Smartravel Rocket ST201F Review: $749.99 or $1,149.99

Moped style · one rear hub motor, 1,200 W sustained · two versions: 873.6 Wh for $749.99, or 1,228.8 Wh with a 1,500 W peak and 32 mph published for $1,149.99 · single speed · hydraulic disc brakes · suspension front and rear · 20 × 4.0 tires · 104.1 lb · a fixed bench published at 33 to 34.25 inches · verified September 26, 2026

Quick Answer — The Smartravel Rocket ST201F is a single-speed, moped-style fat-tire e-bike in two versions: $749.99 with an 873.6 Wh pack, or $1,149.99 with 1,228.8 Wh and 32 mph published. Weighing 180 lb and holding 15 mph on the throttle on flat pavement, you get a computed 48 miles from a charge of the smaller pack, 68 from the larger.

The bench does not adjust, and its published height runs from 33 inches in Smartravel's FAQ to 34.25 on ZOONLAI's geometry table, so the fit section opens with your feet at a light: seated at 34.25 inches, 30 of 100 riders at 5'10" put both feet flat, and 93 of 100 at 6'1".

Either version's motor sits above the 750 W that the e-bike statutes name, and the class section lays those lines side by side before you order.

What this review covers

What each version buys · What it is · Which version · Will it fit you · The motor · The battery · How far it goes · Brakes, lights and display · Suspension and tires · Weight and cargo · What owners report · The Mercer fit test · UL · Recalls · The class question · Where to ride it · Green and red flags · The verdict · Checklist · Buying it from us · FAQ · Limitations · The bottom line · References

How we verified this Smartravel Rocket ST201F review

The figures on this page come from Smartravel's Rocket ST201F page on its US store and the product record behind it, the owner's manual its manuals page files under this model, ZOONLAI's listings of the 1500 W version and the 1200 W version, our own listing, the statutes in the class section, or the reviewers and owners named beside their words.

Everything was read on September 26, 2026. Range and fit are computed, and every formula lists its inputs.

This is a specification-verified review: each number is Smartravel's, a statute's, a named reviewer's or owner's, or arithmetic set out on this page. We sell the Rocket, so read the red flags as closely as the green.

Written by Milad Ghobadibeygvand, BScN (Western University, 2014). Corrections: support@redtailebikes.com.

What each version buys

The first table sets the two versions apart; the second holds what they share. Rows marked ZOONLAI come from the same company's second store, and Limitations lists each place two published figures disagree. Energy is volts times amp-hours: 48 × 18.2 gives 873.6 Wh, and 48 × 25.6 gives 1,228.8.

A retro moped-style bike in two versions

Smartravel sums up the Rocket as a "high-performance 1500W single motor, delivering a top speed of 32 mph", on fat tires "perfect for both urban commuting and off-road adventures", in the feature copy of its US page. The look is a café-racer motorcycle's: a long flat bench, a round caged headlight, a leather bag on the frame and a vented panel below the bench.

Out on a canal bank in Smartravel's own photograph, the rider seated on the bench with both feet on the pedals.

What changes between the versions is the pack, the motor's rating and the top speed; both share one retro frame, with the same brakes, suspension and tires. On our store you choose with a single option at checkout, "Motor and battery", with the two prices $400 apart.

Smartravel's product record dates the listing to January 11, 2023, and owners bought the same bike earlier under another name: two reviews on its page from November 2022 call it the "YYG", one of them the "YYG BR100". Packs have grown since: Pravesh Tiwari's 2024 review gives that pack as "20 amp hour", and TheCrucibleOfNYC read 23.2 Ah off the label of the one unboxed on camera in September 2024.

Which version should you buy?

Buy the 1500 W version if you ride past 20 mph or more than about 36 miles between charges; buy the 1200 W version if your trips are shorter and 20 mph is fast enough. At 15 mph on the throttle a three-quarter plan gives 36 miles on the smaller pack and 51 on the larger, which holds 41% more energy; ZOONLAI lists the smaller version at 20 mph against 32 for the larger one.

The black Rocket, the picture Smartravel's US store shows beside the 1200 W choice.

The gray Rocket, the picture beside the 1500 W choice. Neither store sells the colors as a separate option, so ask us which color ships with the version you order.

Miles from a full charge for a 180 lb rider in 77 °F air, level pavement unless a grade is named; easy pedaling adds 75 W from your legs. The 1200 W version stops at the 20 mph ZOONLAI lists for it. Up 15% its 55 N·m cannot hold a steady speed on the throttle alone; with easy pedaling it holds 11.6 mph.

The extra $400 buys you range at every speed and the speeds above 20. Where both versions run, a mile costs nearly the same energy, since the motor is modeled alike; the larger pack simply holds more of it.

Will the Rocket ST201F fit you?

Fit on the Rocket comes down to a stop light, because the bench is fixed and high. Seated at its 34.25-inch height, 30 of 100 riders at 5'10" in the US Army's survey put both feet flat, and 93 of 100 at 6'1". Every median rider pedals with the bench below the height the 109%-of-inseam formula asks for.

The model sets the 6,068 soldiers the US Army measured for its 2012 survey against the bike's published figures and the frame as ZOONLAI's dimension photograph draws it.

Three steps place you on this frame:

1. Take your inseam in socks: back against a wall, press a hardcover book up between your legs until it is snug, then measure the floor to the book's top edge.
2. Read your height in the stop table, which counts how many riders like you sit flat-footed at each of the three published seat heights.
3. Check the pedaling table if you plan long pedaled miles, since it gives the bend your knee will keep.

The Rocket beside a standing rider in Smartravel's beach photograph; its bench sits at about the height of the rider's upper thigh.

ZOONLAI publishes two rider-height ranges for the Rocket, and Smartravel's US page prints none; the table shows both beside the three seat figures.

Will I pedal with a bent knee?

Yes, at every height: the bench sits 3.0 inches under the formula's pedaling height for the median 5'0" rider and 11.9 inches under it at 6'3". The formula sets the saddle's top at 109% of inseam above the pedal axle (Peveler et al., 2005), and studies accept heights down to 106% (Ferrer-Roca et al., 2012).

A seat that cannot rise leaves one question: how far below the formula it keeps your leg. That runs through the crank axle, 12.2 inches off the ground, and the 5.8-inch cranks, both measured on ZOONLAI's dimension photograph.

The saddle height off the floor that 109% of inseam asks for, the gap to the 34.25-inch bench for the middle rider of each height, and the riders of 100 whose 106 to 110.4% band reaches down to the bench; Army survey bodies, men and women together.

The throttle carries the pace, so treat the pedals as help, not a workout. Tarkis ZOne Productions, 6'1" and 200 miles into owning a Rocket, called it "a throttle bike" and said "It's not really designed to pedal all that much" (the 200-mile review).

Can I put a foot down at a stop?

Flat-footed stops start at about 5'11": seated at the 34.25-inch figure, 56 of 100 riders at 5'11" plant both feet, 77 of 100 at 6'0" and 93 of 100 at 6'1". At Smartravel's own 33 inches the same shares arrive two inches of rider height sooner: 55 of 100 at 5'9", and 79 of 100 at 5'10".

Astride a moped-style bench your feet reach down from the seat's height, so the count below is the stop question answered three times, once per published figure:

Riders of 100 at each height whose barefoot inseam reaches the seat's published height: 34.25 inches on ZOONLAI's 1500 W geometry table, 33.46 on its 1200 W table and 33 in Smartravel's FAQ. The inseam column is the median rider's.

Owners' own reports fall along the same line. At 5'11" and 150 lb, one owner wrote that they "can almost put both feet on the ground flat", and at 5'8" another wrote "I can't reach the ground" (owner reviews on Smartravel's page).

At 6'1", where the table seats 93 of 100 riders flat-footed, Tarkis's "toes are touching" (the 200-mile review). A wide bench spreads the legs and costs reach that a straight inseam does not count, so plan on the 34.25-inch column and a margin below it (Limitations covers the bench's width).

Will I feel cramped, or stretched?

Neither, for most riders: the median rider at every height from 5'0" to 6'3" reaches the grips sitting upright, with the elbow bent. The grips sit 14.6 to 17.6 inches ahead of the crank axle and 27.2 to 29.8 inches above it, close enough that the arms, not the back, take up the reach.

In a study of twenty recreational cyclists ranking three trunk angles, the most upright rated most comfortable (Priego Quesada et al., 2017). The table gives the lean the median rider needs for a straight arm to meet the grip, and the elbow bend that is left when that lean is zero.

Seated on the flat of the bench, each body's measured torso and arm against the grips as the dimension photograph places them; a 0° lean means the median rider reaches the grip sitting straight up, and the elbow column is the bend left over.

Stillman, at 6'1", described it in a review: "the sitting position is like sitting on a street motorcycle" (owner reviews on Smartravel's page).

How much weight goes through my wrists?

About 5% of your body weight for the median rider at every height, a few pounds on each hand. Road racers pedaling on the hoods put 15% through the bars in a lab measure of 10 riders (Carahalios, 2015), three times the Rocket's figure for its median rider.

A forward lean moves weight onto the heel of the hand, over the ulnar nerve; in 36 riders the pressure there peaked with the hands in the most stretched position (Slane et al., 2011), and padded gloves cut palm pressure by 10 to 28%.

The most the hands carry with the back relaxed, from each body's segment weights (Clauser et al., 1969) at the survey's median weight for the height; the bracket runs from the bench's front to its back and across the grip's outline.

How do I set it up when it arrives?

Set the handlebar and learn the stop; the bench has no adjustment to make. Smartravel's FAQ calls the Rocket "90% assembled", and its installation video walks through the rest, ending with the battery: unlock it, "turn the keys to the left", pull it out, and charge it indoors if you like.

Cycling research puts the knee at 25 to 35 degrees of bend with the pedal at its lowest point (Peveler et al., 2007); on this fixed bench almost every rider's knee bends further, as the pedaling table shows.

To see your own figure, sit on the bench, rest a heel on the pedal at the bottom of its stroke and note how far the leg is from straight. With the saddle set where that leg just straightened, the heel method placed 70% of 19 cyclists inside the knee range, more than either inseam formula (Peveler et al., 2005); here it measures the bend you will keep.

How we computed fit

Pedaling height is 1.09 × inseam above the pedal axle; the stop is inseam minus each published seat height; the lean is the least trunk angle at which a straight arm meets the grip; the hand load is the upper body's weight times its lean over the reach.

Worked for a 5'8" rider with the survey's median 32.6-inch inseam: 109% is 35.6 inches from the pedal, 29.8 from the crank axle, and 41.8 inches off the floor, which puts the 34.25-inch bench 7.6 inches below the formula.

ZOONLAI's dimension photograph of the smaller-pack version, the image the fit model measures; its printed figures are discussed below and in Limitations.

The camera views the bike at an angle, so both tires were fitted as ellipses and the photograph mapped back to a true side view before any length was read. The scale comes from the photograph's own 45.27-inch wheelbase, and three published figures held against it agree to within half a percent.

Published figures to the tenth of an inch: ZOONLAI's 1500 W table gives 34.25 inches for the seat and 42.12 for the bar. The photograph's own caption prints the seat at 33.46 inches and Smartravel's FAQ at 33, both below the bench as it measures.

ZOONLAI's 1500 W geometry table labels 42.13 inches as the wheelbase, the figure Smartravel's page gives as the bike's height, while its 1200 W table and the photograph give 45.27; scaled to 42.13 the bench would measure lower than all three published seat figures, so the scale stays with 45.27.

On this short crank the two formulas part a little. For the median 5'8" rider, LeMond's 88.3% from the crank axle plus the 5.8-inch crank comes to 106.1% of inseam from the pedal, at the low edge of the accepted band, against Hamley's 109%; in Peveler and colleagues' riders the LeMond method landed at 109.2 ± 0.9%.

One rear hub motor, 1,200 W sustained

Smartravel's page calls it a "1500W Upgraded Brushless Geared Hub Motor" with "advanced heat-resistant technology", and says it "adapts to your riding conditions in real-time using FOC technology".

The specification table rates it "1200W (sustained), 1500W (peak)" at 86 N·m, in the rear wheel. The sustained figure is the one the range model holds the motor to; the 1,500 W is what it can reach for a burst.

The drive side: one chainring, one rear cog and the hub motor in the wheel, with the coil shock above.

There are no gears to shift. Smartravel's own comparison lists the ST201F with no Shimano gears, and Tarkis puts it plainly: "it doesn't have multiple gears" (the 200-mile review, 4:19). The motor and your throttle set the pace.

The throttle works with the assist levels. Ammon, a 500-mile owner, explained that some throttles run to full speed at any level and others stop at the level's own limit: "This bike is the second type" (owner reviews on Smartravel's page), so on Ammon's account the level you pick caps the throttle too. Tarkis reached 34 mph on level 5.

Owners name a spread of top speeds. Of the 17 reviews on Smartravel's page that give one, 6 say 34 mph and the rest run from 26 to 38; Ahmed Hamed, who "got up to 35mph" at 172 lb, added: "Will be slower if u r heavier." Smartravel publishes 32 mph for the 1500 W version, and ZOONLAI 20 mph for the 1200 W.

If you are weighing a hub motor against a mid-drive on any bike, our e-bike motor guide compares the two.

Two battery sizes: 873.6 Wh or 1,228.8 Wh

The 1500 W version carries 48 V 25.6 Ah, 1,228.8 Wh; the 1200 W version carries 48 V 18.2 Ah, 873.6 Wh. Both packs come out, so you can charge yours off the bike: Smartravel's installation video unlocks the pack with its key and slides it free.

The round cap at the rear of the tube under the bench; ZOONLAI's battery image draws the pack inside that tube.

Smartravel's battery panel says "Even after 800 charges, the battery retains 80% of its original capacity", with a battery management system guarding it (its US page). Its FAQ still names an "LG 48V 15Ah battery", an older figure than the two packs sold today.

Charging: allow a full evening, and longer if you choose the larger pack. Smartravel's page rates the charger 54.6 V 3 A, and ZOONLAI's 1200 W listing names a charger without a rating.

At 3 A the 25.6 Ah pack takes 8.5 hours of full current and the 18.2 Ah pack 6.1, while the published times run from "5 hours" in Smartravel's FAQ to "around 6–8 hours" on ZOONLAI; Tarkis said "Usually I can get a full charge in 4 hours".

Buying a spare or replacement? Match the label, since this model has shipped with more than one pack: Smartravel's battery collection sells replacements by model, and we will confirm the right one for your version before you order.

How far the Smartravel Rocket ST201F goes on one charge

Weighing 180 lb and riding flat pavement on the throttle, you can plan on about 68 miles at 15 mph from the 1500 W version's pack and 48 from the 1200 W version's, or 49 and 35 at 20 mph. Pedaling easily stretches the 15 mph figures to 104 and 74; an 8% grade at 10 mph on the throttle cuts them to 12 and 8.

Your own figure comes from three moves:

1. Pick a speed and an effort in the speed table and the effort table.
2. Add the climbing: each 1,000 feet at 10 mph on 4 to 10% grades costs 173 to 228 Wh on the throttle, or 152 to 204 pedaling easily (hills).
3. Adjust for your load and the temperature, then plan on three quarters of the pack.

The tables compute one steady ride at a time from Smartravel's specifications, Bafang's published figures for a comparable geared hub, drum readings for ten fat tires, the tires as the dimension photograph draws them, and Martin and colleagues' cycling-power model. The formula subsection works one ride through and sets two owners' rides beside the model.

Unless a row says otherwise, each table below is for the 1500 W version and its 1,228.8 Wh pack. The 1200 W version's 873.6 Wh gives about 71% as many miles at any speed both run, and the version table prints its rides side by side.

Does riding faster cut range? Miles at each speed

Yes, sharply: 93 miles at 10 mph on the throttle fall to 29 at 28 mph. Air drag rises with the square of speed and the power to push through it with the cube, so 20 mph asks (20 ÷ 15)³, about 2.4 times, the air power of 15 mph, and the 68 miles at 15 become 49.

The 1500 W version on the throttle, level pavement, 180 lb aboard, 77 °F air. Held to its 1,200 W sustained rating the modeled motor tops out at 28.9 mph on the flat; Smartravel's 32 mph draws on the 1,500 W peak, which a steady figure cannot count on, so that row stays blank. The last column holds a quarter of the pack in reserve.

Pedaling is worth miles at every speed: at 15 mph, 75 W from your legs takes the 1500 W version's charge from 68 miles to 104. Easy pedaling here is 75 W and steady pedaling 150 W; with the motor off, 75 W alone moves this bike at about 8.6 mph on the flat and 150 W at about 12.8.

The 1500 W version, level pavement, 180 lb rider. At 15 mph easy pedaling draws 11.9 Wh a mile from the pack against 18.0 on the throttle. In the 169- and 200-mile cells your legs carry most of the load, so those two depend most on the model's motor losses at light load (Limitations item 7); "legs alone" is a speed 150 W holds without the motor.

On a bench this far below the pedaling height the 150 W column is hard to hold for long (the pedaling table); read the 75 W column as the realistic one.

Which gear saves battery? On a hub motor, your effort does

The Rocket has one gear, so at a given speed the lever on the pack's draw is your effort. The hub motor turns with the wheel; your legs add power through the chain, and the pack supplies the rest:

Watt-hours per mile drawn from the 1500 W version's pack for a 180 lb rider in 77 °F air; easy pedaling is 75 W and steady 150 W.

On the 8% grade at 10 mph, easy pedaling saves 18.6 Wh of every 100.7 the throttle alone would draw. On one gear your cadence rises and falls with road speed: at 15 mph the cranks turn as fast as the single ratio sets them, whether or not that suits your legs.

Does going uphill drain the battery faster?

Much faster: climbing 1,000 feet at 10 mph on 4 to 10% grades costs 173 to 228 Wh on the throttle beyond the same distance on the level, or 152 to 204 with easy pedaling. Raising a 180 lb rider and the 104.1 lb bike through 1,000 feet takes 107 Wh at the wheel; the motor and the pack lose the rest.

On an 8% grade at 10 mph the pack spends 208 Wh for each 1,000 feet, so the full 1,228.8 Wh would lift you about 5,900 feet with nothing left for level ground. Coasting downhill earns nothing back in the model, which keeps the budget cautious.

The 1500 W version on the throttle, 180 lb rider. "Fastest steady" is the speed the motor holds at its 1,200 W sustained rating; the other two columns are at 10 mph. With 75 W of easy pedaling added, a charge at 10 mph lasts 66 miles up 2%, 34 up 4%, 21 up 6%, 15 up 8%, 11 up 10%, 8 up 12% and 6 up 15%.

The owners' hills match the table's shape. Tarkis, at 197 lb, said a hill met at 34 mph can bring the bike "down to almost 22 24 mph", and the model's 1500 W version holds 24.5 mph up 4% and 21.5 up 6%. On the throttle it holds you at 15 mph up grades to 11.8%.

From 8% to 12% the 1200 W version climbs at the same speeds, since its motor carries the same sustained rating; on gentler grades its 20 mph limit sets the pace. Its 55 N·m ends the climb earlier: at 15% it holds no steady speed on the throttle alone, and needs easy pedaling to hold 11.6 mph.

To price your hilly ride, add the level miles to the climbing. Ten level miles at 15 mph on the throttle take about 180 Wh, and 1,000 feet of 8% climbing about 208 more, near 388 Wh of the 1500 W version's 1,228.8. Wind, stop-and-go traffic and hard starts add to that, since the model rides every mile at an even pace.

Does rider weight affect range?

Some on the flat and far more on a climb. Weight adds to the tires' rolling work and to the lift up a grade, and nothing to the air's share, so each added pound matters more as the road tilts.

The 1500 W version on the throttle. The load is the rider plus everything carried; the bike's 104.1 lb rides in every row, since the motor moves it too. 350 lb is Smartravel's limit for rider and cargo.

Going from 180 lb to 300 lb costs 10 miles at 15 mph on the level, 68 down to 58, and cuts the 8% climb from 12 miles to 7. At the 350 lb limit the level ride at 15 mph still reaches about 54 miles; on the 8% grade it falls to 6.

For the 1200 W version, ZOONLAI prints its load as "approximately 330 lbs"; at that load its level 15 mph ride computes to 39 miles and its 8% climb to 4.

Does cold weather drain the battery?

Yes, and each colder row costs more. Pedaling easily at 15 mph, the 1500 W version's 104 miles at 77 °F come to about 78 at 32 °F and 70 at 14 °F.

The 1500 W version on level ground with 180 lb aboard. The middle figures use McMaster University's LG HG2 cell measurements at a 0.5C discharge, the cells taken to be at air temperature; the lab measured at 77, 50, 32 and 14 °F, and the rows between are interpolated. Brackets show how far published cell data disagree.

Each bracket's low end is the least capacity Samsung's data sheets list at that temperature for discharges of one to four times capacity per hour (25R and 30Q at 32 °F, 35E at 14 °F); each high end is the most Casado and colleagues measured in 2025 at a gentler rate.

Three things stack as the air cools: the cells release less energy, denser air pushes back about 9% harder near freezing under the U.S. Standard Atmosphere's gas law, and cold rubber rolls less freely.

For the tires, the model adds 0.5% of rolling resistance per °F below 77 °F, between Rothhämel's fit for a 42 mm tire and Bicycle Rolling Resistance's road-tire average, and holds the 41 °F value for colder rows. The HG2 stands in for the cells, since Smartravel's FAQ names LG without a cell model (Limitations item 13).

Do fat tires cut range? Tires and riding position

The tire matters more than the riding position on level ground. On Bicycle Rolling Resistance's drum, ten 26 × 4.00 fat tires took 23.2 to 42.1 W at 12 psi, 18 mph and a 94 lb load.

No drum reading exists for a 20 × 4.0 tire, so the model uses the median of the ten, a rolling coefficient of 0.0105, and brackets it with the easiest and hardest:

Full-charge miles for the 1500 W version, 180 lb rider, level ground. The lowest reading of the ten was Schwalbe's Jumbo Jim LiteSkin and the highest Kenda's Juggernaut Pro, listed at 0.01262.

Gravel, sand and grass have no drum figure; tell us the surface you ride and we will run it through the model for you.

Posture counts at speed. Tengattini and Bigazzi measured 0.640 m² of drag area on 37 upright cruiser riders, the value this model uses for the Rocket's upright seat, and 0.603 m² on 90 mountain-bike riders; at 0.603 the 20 mph throttle ride would stretch from 49 miles to 51.

Smartravel's 60 to 80 miles, matched to real rides

Smartravel prints three range figures for the 1500 W version, and each fits a steady ride. Its feature copy gives "up to 60 miles on pure electric power or over 80 miles with pedal assist", and its FAQ "60-80 Miles"; ZOONLAI lists the 1200 W version at "45+ Miles".

The 1500 W version's 1,228.8 Wh divided by each figure, and the speed at which the model's level ride with 180 lb aboard draws exactly that; the FAQ's band is read at its top, 80 miles.

So the 60 electric miles fit a ride where you hold about 17 mph on the throttle, and the 80 one where you hold about 17 mph with easy pedaling. For the 1200 W version, ZOONLAI's 45 miles fit 19.4 Wh a mile: about 16.2 mph on the throttle, or 19.5 with easy pedaling.

Tarkis reports being told by Smartravel's distributor that the listing's range "was based on pedal assist one" (the 200-mile review, 12:46), which squares with figures that fit riding in the mid-teens.

Two owners put a charge at about 30 miles on earlier Rockets. Pravesh Tiwari's estimate is for electric power, from a pack he gives as 20 Ah, on a Rocket topping out near 34 mph (the 1,000-mile review); Tarkis, at 197 lb, gets "about 30 miles" on assist level 5 at up to 34 mph, and ran one charge until the pack went dead at about 30 (the 200-mile review, 6:35 and 7:41).

Priced on the 960 Wh pack Pravesh names, since Tarkis names none, the model covers the same miles at a steady 23.7 mph for Pravesh and 23.5 mph for Tarkis, reasonable averages for rides with stops, bursts to 34 mph and hills (the formula subsection).

Plan on 75% of the row that fits your ride, and less in city stop-and-go, keeping 25% in the pack for a headwind or a detour. On the throttle at 15 mph that plan comes to 51 miles on the 1500 W version and 36 on the 1200 W.

How every figure here is worked out

A steady speed needs a steady flow of power to the rear wheel. Martin and colleagues' 1998 model, checked against riders on an open road, gives it for constant speed in still air:

P_wheel = v · [ m g (Crr cos θ + sin θ) + ½ ρ CdA v² ]

In it, v is the speed, m the mass of rider, cargo and bike, g gravity and θ the grade's angle; Crr is the tires' rolling resistance (0.0105 means a drag of 1.05% of the load on the tires), ρ the density of the air, and CdA the drag area that sizes the air the rider shoves aside.

The first bracketed term holds the tires and the grade, and the second the air; multiplied by v, the air's part grows with the cube of speed.

Between the wheel and the pack sit four steps:

1. You pedal through the chain at 97.7% efficiency, the figure Martin and colleagues use, and the motor supplies what your legs do not.
2. The rear hub motor turns with the wheel, on one gear.
3. The motor model borrows a comparable motor's published shape. Bafang's 2021 OEM workbook lists its RM G0H0 geared hub at an n0 of 510 rpm, an nT of 426 rpm and an efficiency of "≥ 80" percent at 48 V; the model keeps that shape, holds the motor to Smartravel's 1,200 W sustained, and caps its torque at 86 N·m, or 55 for the 1200 W version.
4. The pack gives up a small share of its energy as heat inside, at the efficiency Arango, Lopez and Ceren measured on a 48 V pack.

From there, watt-hours per mile = pack watts ÷ mph, and miles = pack watt-hours × the share of energy left at that temperature ÷ watt-hours per mile.

Worked through for the 1500 W version: 180 lb aboard, 15 mph, level pavement, throttle alone. Rolling resistance costs 89.3 W and air drag 114.2 W, a total of 203.5 W delivered at the rear wheel.

The 22.0-inch wheel turns at 229 rpm at 15 mph. The motor model, built from Bafang's published figures, has a torque constant of 0.899 N·m per amp, a 0.253 Ω winding and a 1.32 A no-load current; here it turns out 8.5 N·m on 10.8 A at 78% efficiency and draws 261.3 W.

Counting the pack's own losses, 3.1% here, the cells supply 269.6 W: 17.98 Wh a mile, and 1,228.8 ÷ 17.98 gives about 68.4 miles, or 51.3 with a quarter kept back. The same 15 mph throttle ride on the 873.6 Wh pack comes to about 48.5 miles.

Two published benchmarks, recomputed, and the owners' rides. Each half of the model returns the figure its source prints; the owners' rides show where a real day sits against a steady one:

The model's self-test reruns the first two: Appendix I of Martin and colleagues (8.36 m/s, a 90 kg system, a 0.3% grade) and the RM G0H0's rated point in Bafang's workbook. The owners' rows price each ride as steady miles on a 48 V 20 Ah pack, Pravesh's stated size, and find the steady speed that uses it up.

Brakes, lights and display

Smartravel lists "front & rear mount hydraulic disc" brakes, and ZOONLAI's listing of the 1200 W version says the same: "Front & rear hydraulic disc brakes". They stop 104.1 lb of bike plus you.

The manual adds a motor cut-off: the brake levers carry "a built-in safety switch that automatically cuts off the motor power under normal braking conditions". It also asks for the rear brake "before and while the front brake is applied", and warns that wet roads need "a longer distance to stop" (Smartravel's manual).

The front end: caged headlight, amber turn signal, fork and disc brake.

Lights and signals come fitted. The specification lists an LED headlight and taillight; the manual's control diagram shows a headlight switch and a left and right indicator switch, and its FAQ says the charge shows "on the right handlebar or LED screen".

The "SMART LCD Display with USB Charger" shows you "battery status, speed, and distance", in Smartravel's words. Press and hold M "to switch on/off e bike", and press + or − to "gear up shift" or "gear down shift", in the manual's control diagram.

Suspension front and rear, on 20 × 4.0 tires

Smartravel specifies a "Hydraulic front suspension fork" and a rear "Hydraulic Shock Absorber" that "Provides superior shock absorption for a smoother ride", and its studio photographs show a coil-sprung shock at the rear.

Your weight decides how the rear feels. Two owners found it firm: Deon B, at 155 lb, called the rear shocks "far to stiff for my weight", and Logan C. Larsh found the factory springs "a little to stiff" (owner reviews on Smartravel's page). Tell us your weight and your roads and we will tell you what to expect.

The tires are 20 × 4.0 inches, "Unibody, puncture protection", in Smartravel's specification, with fenders over both. The manual's advice on a flat is short: "Simply replace the tube with a tube of the right size and inflate it."

104.1 pounds and a 350-pound limit

Smartravel gives 104.1 lb (47.3 kg) and a "Maximum total weight limit (combined weight of rider and cargo) of 350 pounds (158.8kg)". For the 1200 W version ZOONLAI prints both 350 lb and 330 lb, so if you choose that version, plan on 330 until it is settled.

The limit counts you and what you carry; the bike's own 104.1 lb is on top. A 210 lb rider with a 25 lb bag and a lock comes to 235 lb, 115 lb under 350.

The leather bag on the frame, the Rocket's built-in carrying space.

Carry one rider. Smartravel's photographs show no footrests for a passenger, and an owner who tried found it awkward with "no pegs". For your cargo the frame bag is what comes fitted; an owner wrote that the bag "holds my chain", and ZOONLAI's 1200 W geometry table gives the battery as 22.48 × 4.72 × 4.72 inches.

Find it a ground-level home: at 104.1 lb, owner Jan wrote that "going up or down steps isn't really practical for this weight bike" (owner reviews on Smartravel's page). Its 66.54 × 25.20 × 42.13-inch footprint parks in a garage beside a car, and the pack comes out to charge indoors.

What owners report

The 108 reviews on Smartravel's page average 4.62 of 5: 78 give five stars, 20 four, 9 three, 1 two and none one, as read on September 26, 2026. They run from November 2022 to September 2026, and some reviewers say they bought on Amazon.

The reviews describe earlier packs as well as today's two, so their range reports belong to their own batteries. What stays constant is the frame, the bench and the ride:

Quoted as written, spelling included, from the reviews on Smartravel's product page, read in full on September 26, 2026.

Rene Pereyra, commuting 24 miles a day, wrote in a review on Smartravel's page that on "full power (All Electric)" with a few hills the bike goes "just about 22-23 miles before I have to start peddling back". Read against the range tables, that fits hard throttle riding on an earlier pack.

The Mercer fit test

Each review we publish seats the same seven family members, the Mercers, on the bike in question, so every machine faces the same fit questions (meet the Mercers).

A verdict here stands on a published figure (ZOONLAI's two height ranges, the three seat heights, the load limit, "to suit most adults" on ZOONLAI's geometry table) or on the model's row for that height in the stop table. Every adult row reads the stop at 34.25 inches, the highest figure and the one the photograph measures.

Jack and Frank show where the bench divides a family. At 6'1" Jack stops flat-footed on 93 of 100 bodies his height, while at 5'10" Frank does on 30 of 100 at the 34.25-inch figure; both sit inside ZOONLAI's ranges, and the seat's true height decides Frank's stops.

Is it UL certified?

Smartravel says so: its Rocket page carries a "UL Certified" badge reading "Safety Certified in Accordance with UL 2849", and a second badge further down reads "TUV Certified" and "In accordance with UL 2849" (its US page). ZOONLAI's listings of both versions carry the same "UL Certified" badge.

A landlord, building manager or insurer may ask for the certificate itself; email us and we will request it from Smartravel in writing, naming the model and the version you own.

Has it been recalled?

No. A September 26, 2026 search of the Consumer Product Safety Commission's recall database turned up no recall under Smartravel, Smart Travel, Smartravelor, ZOONLAI or ZonMen, or under YYG and BR100, names its 2022 owners used, or Tomofree, a name a reviewer's video title gives it, in the recall title, product name or manufacturer field. None of 623 bicycle, e-bike, battery and scooter records names the brand or the ST201 or BR100 model codes.

That empty answer was trusted only after the same search found recalls known to exist: 1 for Ancheer, 54 for Specialized and 24 for Trek.

The class question: 1,200 W, 20 or 32 mph

Read this before you order either version, because the Rocket's published figures sit above the power line the e-bike statutes draw. Smartravel's page rates the motor "1200W (sustained), 1500W (peak)" with 32 mph for the 1500 W version, and ZOONLAI lists the 1200 W version at 1,200 W and 20 mph.

Federal law draws the first line, in the words of 15 U.S.C. § 2085(b):

For the purpose of this section, the term "low-speed electric bicycle" means a two- or three-wheeled vehicle with fully operable pedals and an electric motor of less than 750 watts (1 h.p.), whose maximum speed on a paved level surface, when powered solely by such a motor while ridden by an operator who weighs 170 pounds, is less than 20 mph.

States write their own lines, and California's illustrate them. Vehicle Code § 312.5(a), read September 26, 2026, covers a bicycle "equipped with fully operable pedals and an electric motor that does not exceed 750 watts of power"; § 406(a) defines a moped by "a motor that produces less than 4 gross brake horsepower" and "a maximum speed of not more than 30 miles per hour on level ground".

From the three texts, Smartravel's page and ZOONLAI's 1200 W listing, each read September 26, 2026. At 745.7 W to the horsepower, 1,200 W is 1.6 horsepower and 1,500 W is 2.0.

As published, both versions exceed the 750 W in both e-bike texts; the 1500 W version's 32 mph is also past California's 30 mph moped line, while the 1200 W version's 20 mph falls under it.

Your state's vehicle code decides what a machine of this power is on its roads and what it asks of you; our 50-state e-bike law atlas prints each state's definitions, and our California e-bike law page that state's in full.

Dennis, an owner, put the buyer's side of it plainly: "in most states in the US an ebike has to be under 750 watts", Dennis wrote, planning to keep the speed down (owner reviews on Smartravel's page).

Where you can ride it

Off the pavement, whoever manages the land you ride decides, and the federal agencies define e-bikes around a 750-watt motor. The BLM's definitions cover "an electric motor of not more than 750 watts (1 h.p.)", which a 1,200 W motor is not.

Under the Forest Service's final e-bike directives of March 31, 2022, e-bikes of every class are managed "as motor vehicles", and opening a non-motorized trail to them takes "local-level decision-making and environmental analysis", as the notice at 87 FR 41278 records.

On a Ranger District with a motor vehicle use map, 36 CFR 261.13 bars running a motor vehicle "other than in accordance with those designations"; the map shows which roads and trails are open to one.

The land manager's rule governs; no specification sheet answers any of these alone.

Breaking the Forest Service's prohibitions carries "imprisonment of not more than six months or a fine in accordance with the applicable provisions of 18 U.S.C. 3571 or both", under 36 CFR 261.1b. Our public-land e-bike guide works through the agencies one by one. If off-highway riding is the plan, our Smartravel M23 review covers the group's dirt bike with pedals.

Green flags / Red flags

Green flags

• Two battery sizes in one listing: a computed 68 miles at 15 mph on the throttle for a 180 lb rider on the 1,228.8 Wh pack, 48 on the 873.6 Wh.
• A 1,500 W peak and 32 mph published on the 1500 W version, from a rear hub rated 1,200 W sustained and 86 N·m.
• Climbing that keeps its pace: the 1500 W version holds 15 mph on the throttle up grades to 11.8%.
• Hydraulic disc brakes at both wheels, with a motor cut-off in the brake levers, in Smartravel's manual.
• Suspension at both ends on 20 × 4.0 tires.
• An upright seat: the median rider at every height from 5'0" to 6'3" reaches the grips sitting straight up.
• About 5% of body weight on the hands, a third of the 15% measured on road racers.
• No federal recall names Smartravel, the Rocket or its earlier names in the CPSC database.
• Owners rate it 4.62 of 5 across 108 reviews on Smartravel's page.
• Free delivery and a claim we file for you, on either version.

Red flags

These are about fit: who the Rocket is wrong for, and where to go instead.

• Wrong if your rides must stay inside an e-bike class. A 1,200 W motor puts both versions above the lines in the class section; our Smartravel DK400 review covers a bike Smartravel rates at 750 W sustained.
• Wrong if you are under about 5'11" and want flat feet at every stop. At 5'10" 30 of 100 riders sit flat-footed at 34.25 inches; tell us your inseam and we will find a lower-seated bike from our range.
• Wrong if you want gears for pedaling hills. It has one speed; our Smartravel Raptor ST202 Pro review covers a bike with seven Shimano gears. So does our Raptor ST202 review, for the single-motor Raptor.
• Wrong if you need to carry a passenger or a rear load. It seats one rider and carries a frame bag; tell us what you haul and we will match you to a cargo bike from our range.
• Wrong for daily stairs. At 104.1 lb, a ground-floor garage or room suits it best; tell us about your stairs and we will suggest a lighter bike. Our ZOONLAI UrbanX review covers a city bike that weighs 58.37 lb.
• Wrong if you are a light rider after a soft rear end. At 155 lb, owner Deon B found the rear shocks firm; send us your weight before you order.
• Not for riders under 18. ZOONLAI's geometry table calls it one size "to suit most adults", and each state's rules for younger riders are in our 50-state law atlas.

Buy it if / Buy something else if

Buy it if you want a retro moped-style bike with a 1,500 W peak, 32 mph published and up to 1,228.8 Wh for $1,149.99, or the same frame, brakes and suspension with 873.6 Wh for $749.99, and you ride where your state's rules for a machine of this power are met. It suits you if you are an adult of about 5'11" or taller and ride mostly on the throttle.

On our listing Shop Pay offers the 1500 W version at $103.80 a month for 12 months at 15% APR, $1,245.60 in all, or $200.14 a month for 6 months, and the 1200 W version as 4 interest-free payments of $187.49, each subject to an eligibility check.

Buy something else if you need a bike inside the e-bike classes (our Smartravel DK400 review), gears for pedaling (our Smartravel Raptor ST202 Pro review), or a lower step-over for a shorter rider (our Freesky Rocky Pro A-320 review). Our e-bike reviews hub indexes each review in this series and the rest.

Before you buy: the checklist

Ten checks before you spend $749.99 or $1,149.99; the first three decide whether the Rocket is yours to ride where you mean to.

1. Know your state's definitions for roads (the law atlas) and the land manager's rule for trails.
2. Confirm the rider is an adult; ZOONLAI sizes the Rocket for adults.
3. Read the class section for your version before any ride on a public road.
4. Measure your inseam and find your row in the stop table; under about 5'11", plan on toes at a stop.
5. Hold your height against the published ranges: 5'3" to 6'3" and 5'0" to 6'7", both ZOONLAI's.
6. Choose the version by distance and speed: past 20 mph or more than about 36 miles between charges, the 1500 W; shorter and slower, the 1200 W.
7. Total the rider and the cargo: 350 lb on the 1500 W version, 330 as ZOONLAI prints it for the 1200 W.
8. Plan a ground-level spot for a 104.1 lb bike, 66.54 inches long.
9. Look up your ride in the range tables, plan on three quarters of it and add the climbing.
10. Pick a charging spot indoors, and allow up to 8.5 hours for the larger pack on the 3 A charger.

Buying it from us

Why buy the Rocket ST201F from Redtail

Our listing priced the Rocket on September 26, 2026 at $749.99 for the 1200 W version and $1,149.99 for the 1500 W, with $1,599.99 and $2,199.99 as the regular prices; Smartravel's US store printed the same four figures that day. Its warranty policy sends buyers who bought elsewhere to "their original dealer", and if you buy here, that dealer is us.

Changing your mind has its own terms: a bike still sealed in its factory packaging, returned on a request within 72 hours of delivery, carries a 15% restocking fee plus return shipping, and a canceled order a 3% transaction fee. Ask us your fit, range and class questions before you order, and we will answer them by email.

Frequently asked questions

How far can the Smartravel Rocket ST201F go on one charge?

If you weigh 180 lb and hold 15 mph on the throttle on flat pavement, you get a computed 68 miles on the 1500 W version and 48 on the 1200 W, or 104 and 74 with easy pedaling (the range tables). Smartravel prints 60 miles on electric power and over 80 with pedal assist for the 1500 W version, figures that fit riding near 17 mph.

What is the top speed of the Smartravel Rocket ST201F?

32 mph for the 1500 W version on Smartravel's page, and 20 mph for the 1200 W version on ZOONLAI's listing. Of the 17 owner reviews on Smartravel's page that name a top speed, 6 give 34 mph and the rest run from 26 to 38; the range model, held to 1,200 W sustained, reaches 28.9 mph on the flat (the motor section).

Is the Rocket ST201F 1200W or 1500W?

Both, by version. The $1,149.99 version's hub is rated "1200W (sustained), 1500W (peak)" at 86 N·m on Smartravel's page, and the $749.99 version carries a 1,200 W motor that ZOONLAI lists at 55 N·m (what each version buys).

Which Rocket ST201F version should I buy?

Choose the 1500 W version if you ride past 20 mph or more than about 36 miles between charges, and the 1200 W if your trips are shorter and slower, at $400 less. At 15 mph on the throttle with 180 lb aboard the packs compute to 68 and 48 miles, or 51 and 36 with a quarter kept back (which version).

Is the Rocket ST201F the same as the Rocket ST201F Pro?

No. The ST201F Pro is a separate dual-motor model; this review covers the single-motor Rocket ST201F sold on our listing in its 1200 W and 1500 W versions (what it is).

Is the Rocket ST201F street legal?

That depends on your state's vehicle code. Its 1,200 W motor is above the 750 W in the federal definition and California's, and the 1500 W version's 32 mph is above the 30 mph in California's moped definition; the class section sets those lines beside your version.

Does the Rocket ST201F have gears?

No, it has one speed. Smartravel's comparison marks the ST201F with no Shimano gears, and Tarkis ZOne Productions notes "it doesn't have multiple gears"; you set the pace with the throttle and five assist levels (the motor section).

What is the seat height on the ST201F?

Smartravel's FAQ gives 33 inches, ZOONLAI's 1200 W listing 33.46 and its 1500 W listing 34.25, the figure the dimension photograph measures within 0.3%. Seated at 34.25 inches, 30 of 100 riders at 5'10" put both feet flat. For a median 5'8" rider, whose inseam is 32.6 inches, the bench sits 7.6 inches below the 109% pedaling height (the fit section).

Do I need to assemble the Smartravel ST201F when it arrives?

A little. Smartravel's FAQ calls the bike "90% assembled", leaving you the handlebars to secure, and its installation video shows each step; owner Bo "assembled it in 1hr" (setup).

How long does it take to charge the ST201F battery?

Plan on a long evening if you charge from empty. At 3 A, the rating Smartravel's page gives its charger, the 25.6 Ah pack takes 8.5 hours of full current and the 18.2 Ah pack 6.1; Smartravel's FAQ quotes 5 and 5 to 6 hours, and ZOONLAI "around 6–8 hours" for the 1200 W version (the battery section).

What battery does the Rocket ST201F use?

48 V 25.6 Ah (1,228.8 Wh) on the 1500 W version and 48 V 18.2 Ah (873.6 Wh) on the 1200 W, removable with a key. Earlier Rockets shipped with 20 Ah and 23.2 Ah packs, so match the label if you buy a spare; we will confirm the right one for you with Smartravel (the battery section).

Will the ST201F still work if the battery is dead?

Yes, as a pedal bike: Smartravel's FAQ says it "seamlessly transitions into a traditional bike", and the manual lists "PAS 0 Pure pedal mode". On one gear at 104.1 lb it is slow going, so keep a quarter of your pack in reserve (the range section).

Can the Rocket ST201F carry a passenger?

Plan on one rider. Smartravel's 350 lb limit covers you and your cargo together, its photographs show no passenger footrests, and an owner who tried found it awkward with "no pegs" (weight and cargo).

Does the Rocket ST201F have hydraulic brakes?

Yes. Smartravel lists hydraulic disc brakes front and rear, and its manual says the brake levers cut the motor's power when you brake normally (brakes, lights and display).

Is the Smartravel Rocket ST201F worth it?

If you are an adult of about 5'11" or taller, want a retro moped-style bike and ride where a 1,200 W machine is allowed, yes: $749.99 buys hydraulic brakes, suspension at both ends and 873.6 Wh, and $1,149.99 adds 1,228.8 Wh and 32 mph published, each shipped free on our store (the verdict).

What do owners say about the Rocket ST201F?

The 108 reviews on Smartravel's page average 4.62 of 5, with 78 five-star, as of September 26, 2026. Szabo wrote "Work is 20 miles and I get there with battery to spare", and JT, at 5'11": "it fits me perfect" (what owners report).

Is the Rocket ST201F UL certified?

Smartravel's page states "Safety Certified in Accordance with UL 2849" and carries a second badge reading "TUV Certified". For the certificate itself, ask us and we will get it from Smartravel in writing (the UL section).

Can I finance the Rocket ST201F?

Yes. On September 26, 2026 Shop Pay let you pay for the 1500 W version at $103.80 a month for 12 months at 15% APR, or the 1200 W version in 4 interest-free payments of $187.49, subject to an eligibility check by Affirm's lending partners.

What warranty does the ST201F have?

Smartravel's warranty policy sets 12 months for the frame, motor, controller, charger, display and battery, and points buyers from other sellers to their dealer. If you buy from us, send photos or video with your order number, and in our listing's words "Redtail coordinates repair or replacement remotely at no cost to the customer".

Should I buy the Rocket ST201F or the Smartravel DK400?

Take the Rocket if you want the retro moped look, up to 1,228.8 Wh and 32 mph; take the DK400 if you want seven Shimano gears, a motor Smartravel rates at 750 W sustained and $699.99. Our Smartravel DK400 review computes its range and fit by the same method.

Limitations of this review

Twenty-four things this review cannot settle, set out so you can weigh them.

1. We sell this bike. Weigh the red flags as you weigh the green.
2. This review is specification-verified. Its figures come from Smartravel's published documents, ZOONLAI's listings, statutes, our own store record, named reviewers' and owners' words, the published research cited in the range and fit sections, or arithmetic on this page.
3. Every range figure is one steady ride: one speed, one grade, no wind, no stops. Stops, starts and headwinds cost more; a tailwind costs less.
4. The owners' rides ran on earlier Rockets. Pravesh Tiwari gives his pack as 20 Ah and Tarkis does not give his, so both rides are priced on a 48 V 20 Ah pack; each came from riding with stops, hills and bursts to 34 mph, the model matches the miles at steady speeds of 23.7 and 23.5 mph, and no measured ride on today's packs was found to check against.
5. Bafang's figures stand in for Smartravel's motor. Smartravel gives 1,200 W sustained, 1,500 W peak and 86 N·m; the model uses Bafang's published shape for a geared hub. At 82% efficiency in place of Bafang's 80% floor, the 15 mph throttle figure moves from 68 miles to 74.
6. The model holds the motor to its sustained rating, so it prints no steady figure at 32 mph, where the 1,500 W peak would carry the bike for a stretch.
7. Light-load motor losses are modeled, not measured. The physics returns Martin and colleagues' worked example and the motor Bafang's 80% at the rated point; the 169- and 200-mile cells lean most on the model's losses at light load.
8. The 1200 W version's motor is printed two ways. ZOONLAI's strip calls it a "1200W Peak Motor" and its copy a "1200W High-Efficiency Rear Hub Motor (Peak 1500W)"; the model rates it at 1,200 W sustained, and the torque at its 55 N·m.
9. The 1200 W version's 20 mph and 45 miles are ZOONLAI's. Smartravel's US page names the version and prices it; the top speed and range for it are printed on ZOONLAI's listing of the same bike.
10. How much of the pack the battery management releases is not in the documents read here. On one measured pedelec, researchers at KIT found 75% used in a standard range test, and the planning column keeps the other 25% back.
11. The tire coefficient is the median of ten 26 × 4.00 fat tires at 12 psi, a stand-in for the 20 × 4.0 tire on the bike, and the tire table brackets it with the lowest and highest of the ten.
12. The wheel is measured on ZOONLAI's dimension photograph: 22.0 inches across at the photograph's wheelbase scale; "20" is the rim size.
13. The cold figures rest on one cell's lab data. Smartravel names LG cells in its FAQ without a model, so the central line uses McMaster University's LG HG2, bracketed by other published cell data, with the cells taken to be at air temperature.
14. The charge times are arithmetic on the charger's rating. Smartravel quotes 5 and 5 to 6 hours, ZOONLAI 6 to 8 for the smaller pack and 4 to 6 on its battery image, the manual 3 to 6; at 3 A of full current the packs take 8.5 and 6.1 hours, and the 6.1 assumes the 1200 W version ships with the same 3 A charger, since ZOONLAI's listing prints no rating.
15. Where published figures differ, this review prints each with its source. The seat reads 33 inches in Smartravel's FAQ, 33.46 on ZOONLAI's 1200 W listing and 34.25 on its 1500 W listing; the weight 104.1 lb in the specification tables and 92 lb on ZOONLAI's 1200 W geometry table; the load 350 and 330 lb; the torque 86, 80 and 55 N·m; and the FAQ's pack, "48V 15Ah", differs from both packs sold today.
16. The stop figures treat the bench as a line. A wide bench spreads the legs and takes reach an inseam does not count, which may be why Tarkis, at 6'1", reports toes touching where the model seats 93 of 100 riders flat-footed; plan on the 34.25-inch column with a margin.
17. The fit figures use the US Army's ANSUR II bodies: 6,068 soldiers aged 17 to 58, measured in 2010 to 2012, who are not the US public, so your own inseam decides your row.
18. The frame is measured on one photograph of the 1200 W version. Its scale comes from the photograph's 45.27-inch wheelbase, checked against three published figures to within half a percent; the crank, the crank axle and the grips are read from an angled photograph mapped to a side view, and each carries its bracket.
19. The hand figure is a ceiling with the back relaxed. On a real ride the back and arms carry part of it, and the 109% formula is a starting point that the knee range and the heel check refine.
20. Smartravel's specification table lists "rear rack and fenders included"; its photographs and its box list show fenders and the frame bag, so this review plans the Rocket's load as the rider and a bag, and we will confirm a rack for you in writing.
21. Smartravel's documents state more than one warranty term: 12 months on its badge and in its warranty policy's table, a 2-year line in its page's help block, and 18 months in the manual and its June 2026 blog post. This review states the policy's 12 months.
22. The reviewers' and owners' measurements are theirs, taken on their own bikes, packs, surfaces and settings; some owners describe changes they made to their bikes.
23. The UL statements are in Smartravel's own words. The pages read here do not link the certificate itself.
24. The prices, the versions and the stock state were read on September 26, 2026, and each can change; the recall search covers the CPSC's US database under the names listed.

The bottom line

For $749.99 or $1,149.99, the Rocket ST201F puts a rear hub motor rated 1,200 W sustained on a retro moped-style frame with hydraulic disc brakes, suspension at both ends and 20 × 4.0 tires, and lets you choose the pack: 873.6 Wh, or 1,228.8 Wh with a 1,500 W peak and 32 mph published.

With 180 lb aboard on level pavement at 15 mph on the throttle, count on about 68 miles from the larger pack and 48 from the smaller, or 104 and 74 pedaling easily; each 1,000 feet of climbing at 10 mph costs 173 to 228 Wh on the throttle, and the plan keeps a quarter in reserve.

Our Smartravel brand profile sets those miles beside the DK400's and the Raptor ST202 Pro's, with every Smartravel we sell priced side by side.

It suits you if you are an adult of about 5'11" or taller (where flat-footed stops begin), ride mostly on the throttle and have a ground-level place for 104.1 lb. Through Shop Pay the 1500 W version is $103.80 a month for 12 months at 15% APR, and the 1200 W version 4 interest-free payments of $187.49, each subject to an eligibility check.

Settle the class question first: the motor holds 1,200 W, above the e-bike definitions quoted here. Before you order, name the roads and trails you will use, and we will spell out what each one's rule requires of a 1,200 W bike.

Source register

Each document this review relies on, and what it supports.

T1 is the record itself, read from the party that issued it: a statute, a federal regulation or notice, the maker's own product page, record, manual, policy and videos, and our own store record.

T2 is a party's own publication about its product or its measurements: the motor maker's workbook, the research groups' and laboratories' published measurements, and the reviewers' and owners' recorded words and measurements.

Expiry conditions

Re-read this page if Smartravel changes the Rocket's prices, versions, specification, range figures, seat height or motor ratings on its US page; if ZOONLAI changes the 1200 W version's speed, range, torque or load; if Smartravel publishes or confirms in writing the rack, the certificate or a single warranty term; or if the prices or Shop Pay terms change on our store.

Re-read it as well if a recall is published naming Smartravel, ZOONLAI, the ST201 or its earlier names. Verified September 26, 2026.

References

The full bibliographic record for each document cited above, with the date it was retrieved.

1. Smartravel, Smartravel Rocket ST201F 1500W Fat Tire Electric Bike for Adults — product page (feature copy, Spec&Size table, FAQs, trust badges, 108 customer reviews, as rendered under the US market). Retrieved September 26, 2026. https://www.smartravelor.com/products/electric-bike
2. Smartravel, Rocket ST201F — product record, the two versions' prices and compare-at prices, SKUs ZM21-D and ZM22, the variant images and the creation date. Retrieved September 26, 2026. https://www.smartravelor.com/products/electric-bike.json
3. Smartravel, User manual (controls, battery care, brakes, FAQ, warranty), filed under the Rocket ST201F on its manuals page. Retrieved September 26, 2026. https://cdn.shopify.com/s/files/1/0704/0172/0642/files/User-manual-SMARTRAVEL.pdf
4. Smartravel, Download my owner's manual or view assembly video (manuals page). Retrieved September 26, 2026. https://www.smartravelor.com/pages/download-my-owners-manual-or-view-assembly-video
5. Smartravel-ebike, ST201F ebike Installation instruction, YouTube, April 22, 2023. Retrieved September 26, 2026. https://www.youtube.com/watch?v=rYcCDRgfvUk
6. Smartravel, Warranty&Return Policy (warranty region, the component table, exclusions, claims). Retrieved September 26, 2026. https://www.smartravelor.com/pages/return-policy
7. Smartravel, Electric Bike Replacement Batteries (battery collection). Retrieved September 26, 2026. https://www.smartravelor.com/collections/battery
8. Smartravel, Best 1500W Electric Bikes for Commuting in 2026: Smartravel ST201F & ST202 Reviewed, blog post, June 11, 2026 (comparison table: motor, battery, gears, warranty). Retrieved September 26, 2026. https://www.smartravelor.com/blogs/news/best-1500w-electric-bikes-commuting-2026
9. ZOONLAI, Smartravel Rocket ST201 — product page (geometry table, size slider, FAQs, UL badge). Retrieved September 26, 2026. https://www.zoonlai.com/products/smartravel-rocket-st201
10. ZOONLAI, Smartravel Rocket ST201 D — product page (the 1200 W version: spec strip, FAQs, feature copy, dimension photograph, specification table). Retrieved September 26, 2026. https://www.zoonlai.com/products/smartravel-rocket-st201-d
11. ZOONLAI, Home page, the brand paragraph: "Zoonlai and Smartravel are part of the same company, operating two dedicated product lines to serve different riding needs". Retrieved September 26, 2026. https://www.zoonlai.com/
12. Tarkis ZOne Productions, SMARTRAVEL Electric Bike (My Review after 200 miles), YouTube, August 3, 2023 (fit at 6'1", speed, hills, range to empty, gearing, charge time). Retrieved September 26, 2026. https://www.youtube.com/watch?v=JFNQFtkIa6M
13. Pravesh Tiwari, SMARTRAVEL ST201F/ TOMOFREE YYG BR100 EBIKE REVIEW AFTER 1000+ miles, YouTube, February 6, 2024 (pack size, range, speed). Retrieved September 26, 2026. https://www.youtube.com/watch?v=lh44xefDOgo
14. TheCrucibleOfNYC, Smartravel ST201F E-Bike Unbox and ride, YouTube, September 25, 2024 (battery label, charger). Retrieved September 26, 2026. https://www.youtube.com/watch?v=eR8mhr2VqT0
15. US Government Publishing Office, 15 U.S.C. § 2085 — Low-speed electric bicycles, subsection (b). Retrieved September 26, 2026. https://www.govinfo.gov/content/pkg/USCODE-2024-title15/html/USCODE-2024-title15-chap47-sec2085.htm
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