Samebike RS-A02 Pro Review 2026: $999 Fat-Tire Folder

Double-folding frame · 1000 W rear hub, 1500 W peak · 48 V 15 Ah, 720 Wh · 40 km/h on the spec table · fork and coil rear shock · mechanical discs on the spec table · 20 × 4.0 tires · 72.8 lb · $999 · verified September 26, 2026

Quick Answer — The Samebike RS-A02 Pro puts 20 × 4.0 fat tires, a 1000 W rear hub, a removable 720 Wh battery, a fork and a coil rear shock on a frame that folds twice, for $999. At a steady 15 mph on the throttle, a 180 lb rider covers a computed 43 miles of level pavement.

Samebike's own figure is up to 110 km (68 miles) at the lowest assist level, and easy pedaling at that same 15 mph stretches the computed charge to 65 miles. The range section turns Samebike's numbers into your ride, and the fit section shows which heights its seat post and handlebar suit.

What this review covers

What $999 buys · What it is · Fit · The motor · The battery · How far it goes · Brakes, lights and controls · Suspension and tires · The fold · Weight and load · 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 Samebike RS-A02 Pro review

We read every figure below on September 26, 2026, from Samebike's RS-A02 Pro product page, its product record, the RS-A02 Pro user manual, our listing, or the federal texts quoted in the class and trail sections. Two sections, range and fit, are arithmetic on published inputs, and each one lists what went in.

The review is specification-verified: each number is Samebike's, a cited source's, or arithmetic set out on this page. Redtail sells the RS-A02 Pro, so weigh the red flags as carefully as the green.

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

What $999 buys

Sources: Samebike's product page (stat strip, description, specification table, size-and-fit list, feature panels, FAQ) and the manual's specification page, both read September 26, 2026. Where Samebike's documents give two figures for one thing, the table shows the one we plan on and Limitations item 14 prints the other.

A 72.8-pound fat-tire folder with a shock at the back

The RS-A02 Pro folds in two places: the stem drops the handlebar down, and a latch in the frame swings the front half back beside the rear wheel. Samebike's FAQ calls it a "double folding design (front and body folded)" that "can be stored in the trunk of a car".

Samebike's studio view of the Black RS-A02 Pro: the rack over the rear wheel, the red coil shock under the saddle and the fork up front.

Its product subtitle reads "4.0" Fat Tires, Conquer Diverse Terrains", and the description says the bike is "perfect for city commuting and outdoor adventures". The FAQ adds that it is "suitable for the beach, off-road, and can be carried for travel".

Several bikes answer to the RS-A02 name, so match the model to every figure you read. Samebike's US store sells the RS-A02 Pro at 1000 W with a 48 V 15 Ah pack beside the RS-A02 Plus at 1200 W with a 48 V 17 Ah pack.

Samebike's European RS-A02 Pro page lists a 250 W motor and 25 km/h in its specification table, where the US page prints 1000 W and 40 km/h.

The RS-A02 Pro reviewed here is the one Samebike's US product page lists at 48 V 15 Ah on 20 × 4.0 tires, and 48 multiplied by 15 gives its 720 watt-hours.

The White RS-A02 Pro from Samebike's gallery; the four colors share one frame and parts list.

Will the RS-A02 Pro fit you?

On the seat post Samebike draws, the RS-A02 Pro puts the saddle at the fit formula's height for 99 of every 100 riders at 5'8" and 5'10", 93 at 5'6" and 85 at 6'0"; at 6'2" the count falls to 46, and at 5'4" it is 59.

At the drawn bar height the median rider leans only 9 to 13 degrees from upright, and a relaxed back puts 11 to 13 percent of body weight on the hands. The model places the 6,068 bodies of the US Army's 2012 survey on Samebike's drawing, each saddle at 109% of inseam.

To place yourself on this frame:

1. Measure your inseam in socks, standing against a wall with a hardcover book pressed up where a saddle would sit; read floor to spine.
2. Look up your height in the saddle table below, and check that your inseam falls inside that row.
3. Set the saddle on delivery with the knee and heel checks at the end of this section.

Samebike prints a recommended height of 6'1" to 7'9" for the RS-A02 Pro on its size-and-fit drawing and on a gallery image, and its FAQ calls the bike "suitable for people of all heights". The tables below compute, from the frame Samebike draws, how many riders at each height it suits, with Samebike's figures printed beside them.

Samebike's drawing, scaled to its published 45.8-inch wheelbase. The overall length and both seat heights, read to the seat clamp, agree with Samebike's figures to within 3.5 percent; the grips as drawn sit 12 to 15 percent above Samebike's listed handlebar heights.

Will the saddle go high enough for me?

Yes for 93 to 99 of every 100 riders from 5'6" to 5'10"; the share is 85 at 6'0" and 46 at 6'2". The formula puts the saddle top at 109% of inseam above the pedal axle (Peveler et al., 2005), and published work accepts 106% as the low end (Ferrer-Roca et al., 2012).

From the ground, that height rides on the crank axle 11.3 inches up, 181 mm cranks and a seat post at 71.6 degrees, all measured on Samebike's drawing.

Riders of 100 at each height whose 109% and 106% saddle heights fall inside the drawn post's 36.1 to 41.9 inches, with the typical rider's ground-to-saddle height; Army survey bodies, men and women together. At 5'0" and 5'2" most riders need a saddle lower than 36.1 inches; the 6'2" riders the post misses sit a median of about 0.7 inches short of the formula, and at 6'4" about 1.8.

Samebike's listed seat heights match its drawing at the seat clamp. Read there, the drawing gives 32.2 and 38.0 inches against the listed 31.89 and 37.79; the saddle adds about 3.8 inches above the clamp, and you sit on the saddle, so the tables use the saddle top as drawn.

Can I put a foot down at a stop?

Yes, from about 5'2": 95 of every 100 riders that tall clear the frame's lowest top edge, 27.9 inches up, with both feet down. At 5'8" the same share clears it by 3.2 inches or more, and the median 5'0" rider clears it by half an inch.

The main beam climbs from the seat post toward the head tube, so the frame's top edge is lowest just ahead of the seat post, where a thin tube arcs above the beam; the drawing puts that edge 27.9 inches up.

Clearance is barefoot inseam less the 27.9 inches measured at the frame's lowest top edge, read for the shortest-legged riders at each height: 95 of 100 have at least that much. A negative figure means those riders stand lower than the frame there.

Will I feel cramped, or stretched?

Sitting nearly upright: at the drawn bar height the median rider leans 9 to 13 degrees forward, because the grips sit 35.9 to 42.1 inches above the crank axle and 15.6 to 21.0 inches ahead of it.

In one study, twenty recreational cyclists ranking three trunk angles rated the most upright the most comfortable (Priego Quesada et al., 2017). Each angle in the table is the smallest forward tilt at which a straightened arm meets the grip from the sit bones, computed from that body's own torso and arm lengths.

The median rider's forward tilt at each height with the bar at its lowest drawn setting; the range covers every saddle position and the whole grip cluster.

Samebike's listed handlebar heights put the grips lower than its drawing does, so the lean was run a second time. With the grip cluster moved down to the listed 44.88 inches, its reach unchanged:

The median rider's lean with the grips where the drawing shows them, and with the grips moved to Samebike's listed height, reach unchanged.

How much weight goes through my wrists?

Little: with a fully relaxed back the median rider puts 11 to 13 percent of body weight on the grips at the drawn bar height; the second table below moves the grips to Samebike's listed height. In a lab study of ten road racers riding with their hands on the brake hoods, the bars carried 15% of body weight (Carahalios, 2015).

The heel of the hand sits over the ulnar nerve, and in 36 riders hand pressure peaked in the most stretched-out position (Slane et al., 2011). A raised bar and a core that holds the trunk up both take load off the wrists.

The ceiling on hand load with the back fully relaxed and the bar at its lowest drawn setting, using each body's segment weights (Clauser et al., 1969) and the survey's median weight at that height; the range covers every saddle and grip position.

The median rider's share of body weight on the grips, back relaxed, with the grips as drawn and with them moved to Samebike's listed height.

How do I set the saddle when it arrives?

Set it so the knee stays bent 25 to 35 degrees with the pedal at the bottom (Peveler et al., 2007). The heel method finds that height without a goniometer: rest your heel on the lowest pedal, raise the saddle until that leg is just straight, then pedal on the ball of your foot.

Among 19 cyclists, the heel method landed 70% inside the 25-to-35-degree band, more than either inseam formula did (Peveler et al., 2005). The manual's pre-ride check names the brakes, wheels, handlebar, folding buckles and quick releases, so tighten the seat clamp before the first ride.

How we computed fit

Three formulas carry this section: the saddle top sits 1.09 × inseam above the pedal axle; the lean is the smallest trunk angle at which a straight arm meets the grip; and the hand load balances the weight of head, trunk and arms, times how far ahead of the sit bones it hangs, against the grips' own distance ahead.

Worked through for a 5'8" rider with the median 32.6-inch inseam: the formula asks for 35.6 inches from the pedal and 28.5 from the crank axle (88.3% of inseam gives 28.8), which puts the saddle top 38.4 inches off the ground, inside the drawn 36.1 to 41.9.

The drawing was checked against Samebike's own figures before any length was read from it.

The scale comes from Samebike's published wheelbase, 1163.3 mm (45.8 in), with each axle center located by a circle fitted to its tire. Three of the dimensions land within 3.5 percent; the listed handlebar heights sit below the drawn grips, so the lean and hand tables print both readings.

The motor: 1000 W rated, 1500 W peak

Samebike rates the RS-A02 Pro's rear hub at 1000 W, with a 1500 W peak on the specification table, in the stat strip and in the product's title. Its "Brushless Hub Motor" panel says the bike handles "steep hills (up to 20°), rough terrain, and challenging urban or off-road conditions".

The description gives the torque: "a 80+Nm high torque powerful motor". Our range model takes 80 N·m as the motor's ceiling, below the 90 N·m of the comparable motor whose published shape it borrows.

Two controls start the bike moving. A thumb throttle under the right grip drives it without pedaling, and five pedal-assist levels add power as you pedal; the manual numbers them "0-5, 0 is stop power output, 1 is the lowest power, 5 is the highest power", and says the "Meter startup default gear is 0".

Shift gears for your legs; the hub motor turns at wheel speed in all seven. A gear change moves your cadence only, and the battery feels it through the watts you add, which the gear table prices.

The battery: 48 V 15 Ah, 720 Wh, removable with a key

Forty-eight volts at 15 Ah makes 720 watt-hours, and Samebike's battery image prints the same "Upgraded 720Wh Large Capacity Battery". The range tables below all start from that figure.

The manual's charging page gives two routes: turn the key in the battery lock and carry the pack to an outlet, or plug the charger into the bike, where an indicator light confirms the charge. Its specification lists the charger's output as 54.6 V 2 A, and 15 Ah at 2 A comes to 7.5 hours by plain division.

Allow 6 to 8 hours from empty. The specification table, the battery image and the manual all print that window, so an overnight charge covers it.

Samebike's range figures, divided into the pack, set how many watt-hours each mile may use:

720 Wh divided by each figure; the range section finds the steady ride each row describes.

How far the RS-A02 Pro goes on one charge

On level pavement a full charge carries a 180 lb rider about 43 miles at 15 mph on the throttle, 35 miles at 18 mph, and 65 miles at 15 mph with easy pedaling. Holding 10 mph up a steady 4% grade on the throttle, it lasts about 18 miles.

To find your own number:

1. Choose your speed and your effort in the first two tables.
2. Set aside 134 to 169 Wh of the 720 for each 1,000 feet of climbing on the throttle at 10 mph (the hill table).
3. Correct for your weight and the air temperature, then plan on 75% of the result.

Every table computes one steady ride from Samebike's specifications, Bafang's published figures for a comparable geared hub motor, drum data for ten fat tires and a road-cycling power model tested against riders on a real road. The last subsection works one ride through by hand.

Does riding faster cut range? Miles at each speed

On level ground on the throttle, speed moves your range more than weight, cold or tires do. A charge that lasts 59 miles at 10 mph lasts 30 at 20 mph, since the power the air takes rises with the cube of speed.

Level pavement at 77 °F on the throttle alone, a 180 lb rider on the 72.8 lb bike. The last column keeps a quarter of the pack in hand, the share one pedelec left unused in a laboratory range test (Schmitt, Decker and Doppelbauer, 2019).

Of the changes these tables price, pedaling adds the most: at 15 mph, 75 W from your legs lifts a full charge from 43 miles to 65. Easy here means 75 W and steady means 150 W. With the motor switched off, 75 W would move this bike at about 9.1 mph on the level and 150 W at about 13.2, which tells you which column you can hold.

Full-charge miles on level pavement for a 180 lb rider. At 15 mph easy pedaling draws 11.1 Wh a mile from the pack against 16.8 on the throttle alone; the 129-mile cell rests mostly on your legs and on the model's least certain input, the motor's losses at light load (Limitations item 4).

The assist level is the controller's rule for adding power as you pedal. Whichever level you choose, read the row for the speed you hold and the effort you put in.

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

Pick the gear your knees like; your pedaling sets the battery's share. The hub turns at wheel speed whatever the chain is on, so the watts you add are what change the draw:

Battery watt-hours per mile for a 180 lb rider.

Climbing is where a low gear pays: pedaling a steady 150 W at 12 mph up a 4% grade cuts the battery's share from 41.5 Wh a mile to 23.8, and the easiest cog lets you keep that effort up.

Does going uphill drain the battery faster?

Yes: at 10 mph on the throttle up grades of 4 to 10%, every 1,000 feet of climbing costs 134 to 169 Wh on top of the same distance on the level. Lifting 180 lb of rider and the 72.8 lb bike through 1,000 feet takes about 95 Wh at the rear wheel; the motor's and the pack's losses make up the rest.

Every row holds 10 mph with a 180 lb rider aboard; the middle columns use the throttle, the last adds 75 W of easy pedaling. The manual prints a "Max Angle of Climb" of 20 degrees, and the product page says "up to 20°".

Price a hilly ride in two pieces: its level miles and its climbing. Ten level miles at 15 mph on the throttle take about 168 Wh, and 500 feet of 6% climbing adds about 72, so the pair uses roughly 240 of the 720 Wh. Traffic stops and wind come on top, because the model holds every mile at one steady pace.

Does rider weight affect range?

On the flat, weight changes range a little; on a climb, a lot. Extra pounds add to the tires' work and the hill's, while the air's share stays the same, so the difference grows as the road tilts.

Rider plus everything carried, with the bike's own 72.8 lb added in every row, since the motor moves it too; throttle only. 330 lb is Samebike's load capacity.

At 15 mph on the level, going from 180 lb to 330 lb costs 8 miles, 43 down to 35. On the 8% climb the same step costs close to half the range, 9 miles down to 5.

Does cold weather drain the battery?

Yes: at 32 °F the 15 mph throttle ride that reaches 43 miles at 77 °F falls to about 34, and at 14 °F to about 31.

A 180 lb rider on flat pavement, throttle only. The central figure comes from McMaster University's LG HG2 cell data at a 0.5C discharge, measured at 77, 50, 32 and 14 °F with the rows between interpolated and the cells assumed to sit at air temperature; the brackets span published cell data, which spreads out below freezing (Limitations item 9).

Below freezing three things work against you at once. The cells give back about 89% of their 77 °F energy, and the air grows about 9% denser, by the gas law the U.S. Standard Atmosphere applies.

Cold rubber also rolls harder, by about 0.9% for each degree Celsius, a rate between Rothhämel's fit for a 42 mm tire and Bicycle Rolling Resistance's average for road tires; below 41 °F the model holds it at that temperature's value.

Do the tires cut range? Tires and riding position

The tire you ride moves level-ground range between 40 and 49 miles at 15 mph. On Bicycle Rolling Resistance's drum, ten 26 × 4.00 fat tires measured between 23.2 and 42.1 W at 12 psi, 18 mph and a 94 lb load; the table lists no 20-inch fat tire, so the model uses the median of the ten.

Full-charge miles for a 180 lb rider on the level, throttle only. On the drum, Schwalbe's Jumbo Jim LiteSkin rolled easiest of the ten and Kenda's Juggernaut Pro hardest.

Pump the tires to the pressure printed on their sidewalls; the manual's specification says "According to the actual information on the tire", and its warnings count "insufficient air pressure on the tires" among the habits that drain the pack.

How you sit counts more at speed. Tengattini and Bigazzi measured 37 upright cruiser riders at a drag area of 0.640 m², the model's value, and 90 everyday mountain-bike riders at 0.603 m²; the lower figure would add a mile to the 18 mph throttle ride, 35 to 36.

Samebike's 110 km and 55 km, matched to real rides

Samebike states range four ways for the RS-A02 Pro, and each one matches a different steady ride. The page's headline figure is "UP TO 110KM Pas 1 Mode Range", at the lowest assist level.

• 110 km (68 miles) allows 10.5 Wh a mile: easy pedaling at about 14.7 mph on the level, or steady pedaling at about 17.8 mph.
• The manual's 56 to 72 miles with pedal assist allows 10.0 to 12.9 Wh a mile, easy pedaling at about 14.3 to 16.2 mph.
• The page's 55 km (34 miles) of pure electric range allows 21.1 Wh a mile, the throttle alone at about 18.3 mph.
• The manual's 31 to 34 miles on pure electric allows 21.2 to 23.2 Wh a mile, the throttle alone at about 18.3 to 19.7 mph.

Taken together, Samebike's figures describe light pedaling at the top of the band and a steady throttle ride between 18 and 20 mph at the bottom. For its 250 W European version, Samebike's European page says the 110 km was "Tested by a 75KG rider on a flat road".

Plan on three-quarters of any number here. One measured pedelec used 75% of its nominal pack in a standard laboratory range test (Schmitt, Decker and Doppelbauer, 2019); at 15 mph on the throttle, that turns 43 miles into 32.

How every figure here is worked out

A steady speed needs a steady supply of power at the rear wheel. Martin and colleagues' 1998 model, validated against riders on an open road, gives that power in a single line for constant speed in still air:

Power at the wheel = v × [ m × g × (Crr × cos θ + sin θ) + ½ × ρ × CdA × v² ]

In it, v is speed, m the combined mass of rider, cargo and bike, g gravity, θ the road's slope, Crr the tires' rolling resistance (0.0105 is a drag equal to 1.05% of the weight on them), ρ the density of the air, and CdA the drag area, the size of the hole the rider punches in the air.

From the wheel back to the battery takes four steps:

1. Your pedaling reaches the rear wheel through a chain that is 97.7% efficient, Martin and colleagues' figure; the motor covers what is left.
2. The motor takes its shape from a comparable motor's published figures. Bafang's 2021 OEM workbook gives its RM G0H0 geared hub an n0 of 510 rpm, an nT of 426 rpm and an efficiency of "≥ 80" percent. The model scales that shape to the RS-A02 Pro's 48 V and 1000 W, puts its no-load speed at 24.9 mph, the 40 km/h on Samebike's specification table, and caps its torque at 80 N·m.
3. The pack loses a few percent as heat in its cells, at the efficiency Arango, Lopez and Ceren measured on a 48 V e-bike battery.
4. Watt-hours per mile is the battery's watts over the speed in mph, and the miles are the 720 Wh, scaled for temperature, over that figure.

One ride worked by hand: 15 mph on level pavement, throttle only, a 180 lb rider. Rolling takes 79.5 W and the air 114.2 W, about 194 W at the wheel together.

At that speed the 23.05-inch wheel turns 219 rpm. Built from Bafang's published figures at 48 V, the motor model carries 1.265 N·m per amp, a 0.304 Ω winding and a 1.10 A no-load current, and here it gives 8.5 N·m on 7.8 A at 79% efficiency.

With the pack's internal losses the cells supply 252.6 W, 16.8 Wh per mile at 15 mph: 720 ÷ 16.8 is 42.8 miles, or 32.1 with a quarter kept back.

The checks beneath the model, run again. Each part reproduces a figure its own source publishes:

Martin and colleagues' Appendix I example (8.36 m/s ground speed, a 90 kg system on a 0.3% grade), Bafang's rated point for the RS-A02's comparable RM G0H0, and Samebike's page's pure-electric range, matched by a steady ride below 20 mph.

We found no measured ride of the RS-A02 Pro to an empty pack with its speed and load stated, to check the whole chain; Limitations item 5 names what that leaves unchecked.

Brakes, lights and controls

Samebike's documents disagree on the brakes, so here is each one. The specification table lists a "Mechanical Disc Brake", the stat strip "Mechanical Disc Brakes", and the brake panel, headed "Mechanical Disc Brake", promises "superior braking performance and durability"; the description says "hydraulic disc brakes".

Samebike's own brake photograph, front caliper on the left and rear on the right: a cable runs into the arm of each one.

This review plans on the mechanical discs of the specification table, the stat strip and the brake panel. For hard stops the manual says: "when emergency braking, brake the rear wheel first, then brake the front wheel", and warns of "a danger of tipping over if you brake the front wheel suddenly".

Samebike's cockpit photograph: control pad and horn button at the left, shifter, brake lever and thumb throttle at the right, the color display between.

Lights at both ends, and a horn by your left thumb. The page describes "Super Bright Headlights" that "help you be visible at night" and a rear light "to make night riding more eye-catching"; the manual lists an "Electric Horn Installed", and a short press on the display's headlight key turns the light on and dims the screen.

The display shows speed (current, maximum and average), trip and total distance, the battery and the assist level, and the manual's feature list adds a Bluetooth connection indicator. Holding one button for 2 seconds starts walk mode at "less than 6 kilometers per hour", for pushing only, and the USB port puts out 5 V 1 A, all by the manual.

Suspension at both ends and 20 × 4.0 fat tires

The RS-A02 Pro is sprung at both ends. The specification table lists an "Adjustable Front Fork + Rear Suspension", and Samebike's feature panel describes "adjustable front suspension, rear spring shock absorber" that "effectively reduces bumps and vibrations across uneven surfaces".

Samebike's photograph of the rear shock: a red coil spring between the frame and the plate that links it to the swingarm.

The tires measure 20 × 4.0 inches. Samebike's tire panel says the width gives "greater surface contact with the ground" for "sand, mud and gravel, as well as rocky or uneven trails", and a second panel adds "snow, beach, road, or flat mud".

Samebike's photograph of the front wheel, 20 × 4.0, with the disc and the fork's lower legs.

The tire table shows what rolling resistance costs in miles, priced from drum data for ten fat tires.

The fold: 39.0 × 21.7 × 31.1 inches

Folded, the RS-A02 Pro measures 990 × 550 × 790 mm, 39.0 × 21.7 × 31.1 inches, the figures on Samebike's specification table, its FAQ and gallery image 24. The folding panel's promise is that "you can put it into your trunk easily"; measure your trunk's opening, depth and height against those three numbers first.

Folded: the frame hinges in the middle, the front wheel tucks behind the rear, and the stem lays the handlebar down.

The manual's folding procedure runs in four steps: fold the handlebar in the direction of the arrow, open the buckles one at a time, bend the bike to both sides, and finish the fold.

A fold changes the bike's shape and leaves its mass alone. The same 72.8 lb goes into the car, and at 31.1 inches folded it stands lower than the LO26 Plus, whose 26-inch wheels fold to 39.0 inches tall.

72.8 pounds and a 330-pound capacity

Samebike's specification table lists 33 kg (72.8 lb) for the RS-A02 Pro and a 150 kg (330 lb) payload; the manual prints "E Bike Weight 72 lbs (33kg)" and "Max Load 330 lbs (150kg)", and the size chart "72.7LBS".

A 200 lb rider carrying 40 lb of gear totals 240 lb, within the 330 lb even when the bike's 72.8 lb is added. When your load sits near the limit, email us and we will ask Samebike in writing whether its 330 lb includes the bike, before you order.

The shipping box weighs 83 lb (38 kg) and measures 1450 × 290 × 730 mm, 57.1 × 11.4 × 28.7 inches, by the manual; have a second person ready when it arrives.

The rack that ships on the bike: Samebike's page calls it "thickened" and able to "handle your cargo needs with ease".

The Mercer fit test

Every review runs the same seven archetype riders, the Mercers, through the same fit questions (meet the Mercers). Each verdict rests on a figure Samebike publishes (the height window, the weight, the load capacity) or on the fit tables computed from its drawing.

Frank and Jack show where the RS-A02 Pro splits the Mercers. At 5'10", Frank's formula height sits inside the drawn post for 99 of 100 riders his height; at 6'1", Jack's does for 62, and for 92 at the 106% setting, so Jack reads the saddle table and sends us his inseam before he orders.

The Dark Green RS-A02 Pro, one of four colors on our listing at the same $999.

Is it UL certified?

The certification mark in the RS-A02 Pro manual reads "EPAC EN 15194", on its last page. UL Solutions certifies e-bikes to UL 2849 "by examining the electrical drive train, battery, and charger system combinations in e-bikes".

If your building, landlord or insurer asks for a UL 2849 certificate, email us and we will ask Samebike for one in writing before the bike ships.

Has it been recalled?

No. On September 26, 2026, no recall in the Consumer Product Safety Commission's recall database named Samebike, its maker Guangzhou Sameway or the RS-A02. Five spellings (Samebike, Same bike, Samebikes, Sameway, Guangzhou Sameway) went through the title, product-name and manufacturer fields, and every field of 623 bicycle, e-bike, battery and scooter recalls was read for "RS-A02".

That day the CPSC's site search, which also holds its consumer warnings, returned nothing for Samebike or Sameway, while identical searches found the recalls and warnings filed for other e-bike and bicycle brands.

The class question: 1000 W, 40 km/h and a throttle

Samebike's US page gives the RS-A02 Pro no class, which leaves the call to the definition in your state. Those definitions look at three things, all of which Samebike publishes: a 1000 W rated motor with a 1500 W peak, a 40 km/h (24.9 mph) top speed, and a thumb throttle that moves the bike with no pedaling.

At the federal level, 15 U.S.C. § 2085 brings low-speed electric bicycles under the Consumer Product Safety Commission's bicycle rules, and subsection (b) defines one as "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."

Sources: 15 U.S.C. § 2085, Samebike's product page and the RS-A02 Pro manual, each read on September 26, 2026.

When a watt or speed figure in your state's definition decides where you may ride, ask us before you order. Samebike prints two top speeds for the RS-A02 Pro across its images and tables, and the federal text does not say whether its 750 W means peak or continuous power. Write to us and we will ask Samebike in writing about the power and speed of the unit you would receive.

The other call is to your insurer: the manual notes that your current policy "may not cover the situation you may encounter when riding an electric bike" and points you to your insurer or broker. Our 50-state e-bike law atlas holds every state's definition.

Where you can ride it

Each road, path and trail answers to its own manager. Where a trail's rule names classes, one open to class 1 bikes only is closed to the RS-A02 Pro: on federal land a class 1 motor "provides assistance only when the rider is pedaling" (43 CFR 8340.0-5(j)(1)), and this bike's thumb throttle works without pedaling.

On Bureau of Land Management ground, 43 CFR 8340.0-5 sets out three classes around "an electric motor of not more than 750 watts (1 h.p.)", and counts an e-bike as a non-motorized bicycle only where "the authorized officer has expressly determined" it.

Each row answers to a different document, and none of those documents is the bike's spec sheet.

Samebike points the fat tires and the rear shock at sand, gravel and uneven trails; where a trail's rules admit a throttle bike, our public-land guide walks through each federal agency's.

Green flags / Red flags

Green flags

• $999, the price on Samebike's own US store: matched on September 26, 2026, with $1,299 listed as the regular price for Black, Dark Green and Navy.
• 20 × 4.0 fat tires that fold twice: the frame and the stem both fold, to 39.0 × 21.7 × 31.1 inches by Samebike's specification table.
• A fork and a coil rear shock: sprung at both ends, in the specification table, the feature panel and the photographs.
• A frame you can straddle from about 5'2": 95 of 100 riders that tall clear its lowest top edge with both feet down.
• A removable 720 Wh pack: a computed 65 miles at 15 mph pedaling easily for a 180 lb rider, charged in the bike or off it in 6 to 8 hours.
• Free delivery, and transit damage is ours to claim: shipping costs nothing in the contiguous United States, and a damaged arrival reported within 48 hours becomes our claim with the carrier.
• Headlight, rear light, horn and rack, all standard on the bike.
• A 330 lb load capacity on a 72.8 lb bike.

Red flags

These are about fit: who the RS-A02 Pro is wrong for, and where to go instead.

• Wrong if you are under about 5'4". The drawn saddle's lowest setting, 36.1 inches, sits above the formula height for most riders under 5'4"; the CY20 Pro's drawn post reaches it for 99 of 100 riders at 5'4" in our CY20 Pro review.
• Wrong if you are 6'2" or taller and want the full 109% saddle height. The drawn post reaches it for 46 of 100 riders at 6'2" (81 at 106%); email us your inseam and we will run it against the RS-A02 Pro and the other Samebike models we carry.
• Wrong if you want hydraulic brakes on a folder at $999. The specification table lists mechanical discs; the LO26 Plus folds with hydraulic discs at the same $999.
• Wrong if you want a bigger pack on the same kind of folder. The RS-A02 Pro carries 720 Wh; the RS-A02 Plus folds on 20 × 4.0 tires with a 48 V 17 Ah pack, 816 Wh, and our RS-A02 Plus review runs the same range and fit models on it.
• Wrong for trails open to class 1 bikes only. The throttle keeps it off them; our public-land guide quotes each agency, and we can read your trail's rule with you.
• Wrong for riders under your state's minimum age. Our 50-state atlas prints each state's age floor; send us the rider's age and we will name a bike from our shelf that clears it.

Buy it if / Buy something else if

Buy it if you want fat 20 × 4.0 tires on a bike that folds down to 31.1 inches tall for a car trunk or a closet; you are between about 5'6" and 6'0", where the drawn seat post suits most riders; you want to sit upright; and you want a fork, a rear shock and a 720 Wh pack for $999.

For $999 the RS-A02 Pro brings a 1000 W hub, a removable 720 Wh pack, suspension at both ends, 20 × 4.0 tires, seven gears, a thumb throttle, lights at both ends, a horn and a rear rack.

Our listing offers Shop Pay's four interest-free installments; its sample plans read $333.00 every two weeks for six weeks at 0% APR, $999 in total, or $90.17 a month for 12 months at 15% APR, $1,082.04 in total, each subject to an eligibility check.

Buy something else if you are under about 5'4", where the $599 CY20 Pro is the Samebike to measure against, or if you want hydraulic brakes and a bigger pack on a folder, where the RS-A02 Plus carries both. At 6'2" and up, find your row in the saddle table before you choose.

The Navy RS-A02 Pro from Samebike's gallery.

Our LO26 Plus review and our CY20 Pro review cover two of Samebike's other folders in the same depth, our RS-A08 II review takes the same measure of a Samebike that does not fold, our M20-III review of the one with two motors, our M20 review of its single-motor bench bike, our STORM review of its 960 Wh step-over bike on 26 × 4.0 tires, our CREST review of the same drivetrain with no top tube, and our e-bike reviews hub sets reviews of other makers' bikes out by style, rider and price. For every Samebike we stock in one table, see our Samebike brand profile.

Before you buy: the checklist

Eight checks before you spend $999; the first three settle whether the RS-A02 Pro fits your body and your route.

1. Take your inseam in socks and read your height's row in the saddle table.
2. Read your state's e-bike definition and age rule in our atlas, and the class wording posted on the paths you plan to ride.
3. Work out your ride's watt-hours from the range tables, then keep a quarter of the pack in reserve.
4. Check the trunk or closet against the folded size, 39.0 × 21.7 × 31.1 inches, the 31.1-inch height too.
5. Line up help for the lift: the box weighs 83 lb on delivery day, and the bike 72.8 lb after.
6. Add up your weight and your cargo and keep the total under 330 lb.
7. Pick where it will charge: 6 to 8 hours from empty.
8. Call your insurer, as the manual suggests.

Buying it from us

Why buy the RS-A02 Pro from Redtail

$999 matched the listed price on Samebike's US store for all four colors when we checked both on September 26, 2026. What we add begins the day your order ships.

A change of mind follows different terms: an unopened bike in its factory-sealed packaging, requested within 72 hours of delivery, carries a 15% restocking fee plus return shipping, and a canceled order a 3% transaction fee. We answer fit and route questions before you order for exactly that reason.

Frequently asked questions

How far can the Samebike RS-A02 Pro go on one charge?

Samebike's figure is up to 110 km (68 miles) at pedal-assist level 1. Computed for a 180 lb rider on level pavement, a full charge lasts about 43 miles at 15 mph on the throttle, 35 at 18 mph and 65 at 15 mph with easy pedaling; at 10 mph up a 4% grade on the throttle, about 18. The range tables set it out.

What is the top speed of the Samebike RS-A02 Pro?

40 km/h (24.9 mph) on Samebike's specification table and stat strip; Samebike's gallery image 26 prints 25 km/h. Email us and we will ask Samebike in writing which figure applies to the bike you would receive.

Is the RS-A02 Pro 1000 W or 1200 W?

1000 W rated with a 1500 W peak, on Samebike's US specification table for the RS-A02 Pro. The 1200 W figure belongs to the RS-A02 Plus, which Samebike rates at 1200 W with an 1800 W peak and a 48 V 17 Ah pack on its own page.

Is the RS-A02 Pro street legal, and what class is it?

Samebike gives it no class, so your state's e-bike definition decides what it counts as where you ride. Those definitions test the 1000 W rating, the 1500 W peak, the 40 km/h (24.9 mph) top speed and the thumb throttle; our 50-state atlas prints each state's definition, and the class section quotes the federal text.

How much does the Samebike RS-A02 Pro weigh?

33 kg, 72.8 lb, on Samebike's specification table; the manual rounds it to 72 lb and the size chart prints 72.7 lb. It carries up to 150 kg (330 lb), and its box weighs 83 lb.

Does the RS-A02 Pro have hydraulic brakes?

Samebike's specification table, stat strip and brake panel list mechanical disc brakes, and its brake photograph shows a cable into each caliper; the page's description says "hydraulic disc brakes". The brakes section shows both, and the RS-A02 Plus is the Samebike folder listed with hydraulic discs.

What battery does the RS-A02 Pro have?

A removable 48 V 15 Ah pack, 720 watt-hours, which the manual takes out with a turn of the key; Samebike's battery image prints "720Wh". The battery section covers charging and the pack's range figures.

Can you replace the RS-A02 Pro's battery?

Yes: the pack comes off the frame once its key is turned, by the manual's charging page. Samebike's warranty policy covers batteries for 1 year, then, in its words, "A prorated credit, based on months of service, will be applied toward the purchase of a new battery." Email us your order number and we will confirm the right replacement pack for your RS-A02 Pro before you buy it.

How long does the RS-A02 Pro take to charge?

6 to 8 hours from empty, the figure on Samebike's specification table, its battery image and the manual. You can charge the pack on the bike or off it.

How do you fold the Samebike RS-A02 Pro?

Fold the handlebar down, open the buckles one at a time, bend the bike to both sides and finish the fold, the four steps in the manual. Folded, it measures 39.0 × 21.7 × 31.1 inches.

What's the difference between the RS-A02 Pro and the RS-A02 Plus?

On Samebike's US pages (RS-A02 Pro, RS-A02 Plus) the RS-A02 Pro has a 1000 W motor, a 48 V 15 Ah pack, mechanical discs on its specification table and a 40 km/h top speed, for $999; the RS-A02 Plus has a 1200 W motor, a 48 V 17 Ah pack, hydraulic discs and 45 km/h, for $1,199. Both fold on 20 × 4.0 tires and weigh 33 kg.

Our RS-A02 Plus review compares their shocks and wheels.

What rider height fits the RS-A02 Pro?

Samebike prints 6'1" to 7'9" on its size chart and says in its FAQ that the bike suits "people of all heights". On its drawn seat post, a 5'8" rider with the median 32.6-inch inseam needs a saddle 38.4 inches off the ground, inside the drawn 36.1 to 41.9, and the fit tables show the post reaching the formula height for 99 of 100 riders at 5'8".

Does the Samebike RS-A02 Pro have a throttle?

Yes: a thumb throttle under the right grip, in Samebike's cockpit photograph and among the manual's handlebar parts, beside five pedal-assist levels. The range tables show what the throttle and your pedaling each cost in miles.

How much torque does the RS-A02 Pro have?

The US description says "80+Nm", and Samebike's European page for the RS-A02 Pro prints "80+Nm Torque". The range model uses 80 N·m as its ceiling.

Is the RS-A02 Pro good for off-road riding?

It has a suspension fork, a coil rear shock and 20 × 4.0 tires, which Samebike says suit "sand, mud and gravel, as well as rocky or uneven trails". Whether you may ride a given trail depends on its posted rules; the trail section shows who sets them.

What tire pressure does the RS-A02 Pro use?

The manual's specification points to the tire itself, "According to the actual information on the tire", so inflate within the range printed on the sidewall of the 20 × 4.0 tires. The same manual counts "insufficient air pressure on the tires" among the habits that cost range, and the tire table prices rolling resistance in miles.

Where do I find the RS-A02 Pro manual?

Samebike links the RS-A02 Pro user manual from its product page's FAQ. The English section covers assembly, folding, charging, the display, pre-ride checks and the warranty.

Can I pay for the RS-A02 Pro in installments?

Yes, through Shop Pay on our listing: four interest-free installments, or 12 monthly payments of $90.17 at 15% APR, $1,082.04 in total, read September 26, 2026 and subject to an eligibility check by Affirm's lending partners.

Is Samebike a legit brand?

Begin with this bike's record: no CPSC recall or warning named Samebike on September 26, 2026, the figures this review works from are on Samebike's own US store, and its about page gives the maker as Guangzhou Sameway Electric Bicycle Co., Ltd., founded in 2004. The verdict says who the RS-A02 Pro suits.

Limitations of this review

Eighteen things this review cannot settle, listed so you can weigh them.

1. Redtail sells this bike. Read the red flags as carefully as the green ones.
2. This is a specification-verified review. Its figures come from Samebike's published documents, statutes, our own store record, the research the range and fit sections cite, or arithmetic on this page.
3. Each range figure describes a steady ride at one speed on one grade, with no wind and no stops. Stops, starts and headwinds cost more; a tailwind costs less.
4. Bafang's figures stand in for Samebike's motor. The documents read here name no motor maker and give no no-load speed or efficiency, so the model keeps the published shape of Bafang's RM G0H0 at the RS-A02 Pro's 48 V and 1000 W with a 24.9 mph no-load speed. At 82% efficiency in place of 80%, the 15 mph throttle figure moves from 43 miles to 47; at a 750 W rating, to 43.
5. No measured ride checks the whole model. The physics reproduces Martin and colleagues' worked example, the motor reproduces Bafang's 80% at the rated point, and Samebike's 55 km pure-electric figure matches a steady 18.3 mph throttle ride, but we found no ride of the RS-A02 Pro to empty with its speed, load and weather stated.
6. The torque cap comes from the US description's "80+Nm". The specification table prints no torque row; the model uses 80 N·m, below the 90 N·m of the comparable motor.
7. Every figure assumes the full 720 Wh. The documents read here do not say how much of the pack the battery management system releases; on one measured pedelec, researchers at KIT found 75% used in a standard range test, the source of the 25% reserve.
8. The tire coefficient and the wheel are borrowed or measured. Bicycle Rolling Resistance's fat-bike table lists no 20-inch fat tire, so the model uses the median of ten 26 × 4.00 tires at 12 psi, bracketed in the tire table; Samebike prints the tire size, 20 × 4.0, but not the tire's outside diameter, so the 23.05 inches is measured on its drawing.
9. The cold figures rest on one cell's laboratory data. The documents read here name no cell maker for the RS-A02 Pro, so the central line uses McMaster University's LG HG2 cell, bracketed by other published cell data, with the cells assumed to be at air temperature.
10. The fit figures rest on a measured drawing. The crank length, crank height, seat angle, grip position and the frame's lowest top edge were measured on Samebike's size-and-fit drawing at the wheelbase scale, where the overall length and both seat heights agree with Samebike's figures within 3.5 percent.
11. Two readings of the handlebar height are printed. Samebike lists 44.88 to 49.6 inches; its drawing puts the grip centers at 50.3 to 57.1. The main lean and hand tables use the drawing, the second tables use the listed height, and a written answer from Samebike on where it measures the handlebar would settle which to use.
12. The bodies are the US Army's. The 6,068 riders come from the 2012 ANSUR II survey, not a sample of the general public, so a body unlike the survey's at your height can sit differently on the same bike.
13. The hand figure is a relaxed-back ceiling. It assumes the upper body hangs on the arms; a rider who holds the trunk up with the core puts less weight through the grips.
14. Where Samebike prints two figures for one thing, this review plans on one and names the other here. Brakes: "Mechanical Disc Brake" on the specification table, the stat strip and the brake panel, "hydraulic disc brakes" in the description. Top speed: 40 km/h on the specification table and stat strip, 25 km/h on gallery image 26. Battery: 48 V 15 Ah on the table, the description and in the manual; one feature panel repeats "48V 17Ah Battery 40+40Miles Range". Weight: 33 kg on the table, "72 lbs (33kg)" in the manual, 72.7 lb on the size chart. Unfolded size: 1.72 × 0.63 × 1.2 m on the table, 1710 × 630 × 1260 mm in the manual and 1710 × 630 × 1200 mm in the FAQ. Wheelbase: 45.8 in on the size-and-fit list, and 1145 mm on gallery image 24's axle-to-axle line, which it labels "Straddle Height". Rider height: 6'1"–7'9" on the size chart, "suitable for people of all heights" in the FAQ. Email us and we will ask Samebike which applies to the bike you order.
15. The load capacity's basis is not stated. The documents read here do not say whether Samebike's 330 lb counts the bike's own 72.8; a load that stays within 257.2 lb of rider and cargo fits either reading.
16. The certification read here is the manual's EN 15194 mark. The US product page, product record and manual print no UL 2849 certificate number; email us and we will ask Samebike for one in writing.
17. The recall search covers the CPSC's US database under the names listed; a recall filed under another company name would need that name searched.
18. Stock and price were read on September 26, 2026, and both can change.

The bottom line

For $999, the RS-A02 Pro gives you a 1000 W rear hub, a removable 720 Wh pack, a fork and a coil rear shock, 20 × 4.0 tires, seven gears, a thumb throttle, five assist levels, lights at both ends and a rack, on a frame that folds to 39.0 × 21.7 × 31.1 inches.

A 180 lb rider on level pavement gets about 43 miles at 15 mph on the throttle and 65 pedaling easily. Samebike publishes 1000 W and 40 km/h for the bike and lists no class for it, so where you may ride it is your state's call.

It fits riders from about 5'6" to 6'0" best on its drawn seat post, sits them upright, and lets a rider from about 5'2" straddle the frame with both feet down; the brakes are mechanical on Samebike's specification table. Through Shop Pay on our listing, it comes to four interest-free installments, or $90.17 a month for 12 months at 15% APR, subject to an eligibility check.

Send us your height, your inseam and your route before you buy, and we will reply with numbers: where the saddle and the grips land for you, how far your ride goes on a charge, and whether the paths you ride admit a throttle.

Source register

The documents this review relies on, and what each one supports.

T1 is the record itself, read from the party that issued it: a statute, a federal regulation, the maker's own product page, record and manual, our own store record. T2 is a party's own publication about its product or its measurements: the motor maker's workbook and the research groups' and laboratories' published measurements.

Expiry conditions

Re-read this page if Samebike changes the RS-A02 Pro's price, specification, brake listing, range figures or size-and-fit drawing on its US product page; if Samebike answers our written questions on the handlebar height, the brakes, the certificate, the delivered speed and power, or the load basis; or if the stock, the price or the Shop Pay terms change on our store.

Re-read it too if Congress amends 15 U.S.C. § 2085, if Samebike publishes a class for the RS-A02 Pro, or if a recall or warning is published naming Samebike or Sameway. Verified September 26, 2026.

References

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

1. SAMEBIKE US, RS-A02 Pro Off Road Peak 1500W Fat Tire Foldable Electric Bike — product page (stat strip, description, Specifications, Size and Fit, feature panels, gallery, FAQs, as rendered). Retrieved September 26, 2026. https://us.samebike.com/products/rs-a02-pro-off-road-peak-1500w-fat-tire-foldable-electric-bike
2. SAMEBIKE US, RS-A02 Pro — product record, variant prices, compare-at prices, SKUs and images. Retrieved September 26, 2026. https://us.samebike.com/products/rs-a02-pro-off-road-peak-1500w-fat-tire-foldable-electric-bike.json
3. Guangzhou Sameway Electric Bicycle Co., Ltd., Model: RS-A02 Pro product instruction manual (English section: Important warning, Unpacking and specs, Product components, Method of assembly, Product instruction, Preparation before riding, Warranty policy). Retrieved September 26, 2026. https://cdn.shopify.com/s/files/1/0684/9173/9372/files/RS-A02_Pro_User_Manual.pdf?v=1780639507
4. SAMEBIKE US, Warranty Policy. Retrieved September 26, 2026. https://us.samebike.com/pages/warranty-policy
5. SAMEBIKE US, About Us. Retrieved September 26, 2026. https://us.samebike.com/pages/about-us
6. SAMEBIKE EU, RS-A02 Pro Fat Tire Off Road E-bike — product page (torque, speed and range test figures). Retrieved September 26, 2026. https://samebike.com/products/rs-a02-pro-fat-tire-off-road-e-bike
7. SAMEBIKE US, RS-A02 Plus Off Road Peak 1800W Fat Tire Foldable Electric Bike — product page. Retrieved September 26, 2026. https://us.samebike.com/products/rs-a02-plus-off-road-peak-1800w-fat-tire-foldable-electric-bike
8. U.S. Government Publishing Office, 15 U.S.C. § 2085, Low-speed electric bicycles, subsections (a) and (b). Retrieved September 26, 2026. https://www.govinfo.gov/content/pkg/USCODE-2024-title15/html/USCODE-2024-title15-chap47-sec2085.htm
9. Electronic Code of Federal Regulations, 43 CFR part 8340, § 8340.0-5 Definitions, paragraphs (a)(5) and (j). Retrieved September 26, 2026. https://www.ecfr.gov/current/title-43/subtitle-B/chapter-II/subchapter-H/part-8340
10. Electronic Code of Federal Regulations, 36 CFR § 261.13, Motor vehicle use. Retrieved September 26, 2026. https://www.ecfr.gov/current/title-36/chapter-II/subchapter-B/part-261/subpart-A/section-261.13
11. U.S. Consumer Product Safety Commission, Recalls REST service (saferproducts.gov), queries for Samebike, Same bike, Samebikes, Sameway and Guangzhou Sameway; controls Ancheer, Specialized and Trek. Retrieved September 26, 2026. https://www.saferproducts.gov/
12. U.S. Consumer Product Safety Commission, site search for Samebike and Sameway, with a known-positive control. Retrieved September 26, 2026. https://www.cpsc.gov/search?search_api_fulltext=Samebike
13. Redtail eBikes, Samebike RS-A02 Pro Folding Fat Tire Electric Bike — product listing, with its Shop Pay installment terms. Retrieved September 26, 2026. https://redtailebikes.com/products/samebike-rs-a02-pro
14. Redtail eBikes, Shipping policy, Refund policy and Terms of service. Retrieved September 26, 2026. https://redtailebikes.com/policies/shipping-policy · https://redtailebikes.com/policies/refund-policy · https://redtailebikes.com/policies/terms-of-service
15. Affirm, Lending partners. Retrieved September 26, 2026. https://www.affirm.com/lenders
16. UL Solutions, E-Bikes Certification: Evaluating and Testing to UL 2849. Retrieved September 26, 2026. https://www.ul.com/services/e-bikes-certificationevaluating-and-testing-ul-2849
17. BAFANG, Workbook OEM 2021, MOTORS table, RM G0H0 column: n0, nT, rated power, efficiency, maximum torque at 48 V. Retrieved September 23, 2026. https://www.bafang-e.com/Uploaded/Labels/BAFANG%20Workbook%20OEM%202021.pdf
18. Martin, J. C., Milliken, D. L., Cobb, J. E., McFadden, K. L. and Coggan, A. R., Validation of a Mathematical Model for Road Cycling Power, Journal of Applied Biomechanics 14(3):276–291 (1998), Eq. 14 and Appendix I; doi 10.1123/jab.14.3.276. Retrieved September 23, 2026. https://collections.lib.utah.edu/dl_files/b4/8e/b48ef26086091662c561e673d7bd990d77868437.pdf