Samebike RS-A02 Plus Review 2026: 816 Wh for $1,199

Double-folding frame · 1200 W rear hub, 1800 W peak · 48 V 17 Ah, 816 Wh · hydraulic disc brakes · fork and rear shock · 20 × 4.0 tires · 45 km/h on the spec table · 72.8 lb · $1,199 · verified September 27, 2026

Quick Answer — The Samebike RS-A02 Plus is a double-folding fat-tire e-bike with a 1200 W rear hub, a removable 816 Wh battery, hydraulic disc brakes and suspension at both ends, for $1,199. On level pavement at a steady 15 mph on the throttle, a 180 lb rider covers a computed 48 miles.

Pedal lightly at that speed and the computed charge reaches 73 miles; Samebike's headline figure is 130 km (81 miles) at pedal-assist level 1. The range section turns both into rides you can plan, and the fit section sets out which heights the seat post suits, on two readings of Samebike's figures.

What this review covers

What $1,199 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 Plus review

Samebike's figures below were read on September 27, 2026, from its RS-A02 Plus product page, its product record, the RS-A02 Plus user manual and our listing; the federal texts are quoted in the class and trail sections. Range and fit are arithmetic on published inputs, and each section lists its inputs with their sources and dates.

This is a specification-verified review: each number is Samebike's, a cited source's, or arithmetic shown on the page. We sell the RS-A02 Plus, so read the red flags as closely as the green ones.

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

What $1,199 buys

Sources: Samebike's product page (stat strip, description, specification table, size-and-fit list, feature panels, FAQ) and the specification page of the manual, both read September 27, 2026. Where Samebike's documents give two values for one thing, the table prints both or the one this review plans on, and Limitations item 14 has the rest.

An 816 Wh fat-tire folder with hydraulic brakes

The main beam of the RS-A02 Plus hinges, so the front half swings back beside the rear wheel. Samebike's FAQ calls it a "double folding design (front and body folded)", and its trunk answer gives the folded size as "9607401010".

Samebike's studio view of the Black RS-A02 Plus: cast wheels, a braced riser bar, the round headlight and a compact black rear shock.

The product subtitle reads "100+Nm Full Suspension Outdoor Folding E-Bike", and the description promises a bike "perfect for city commuting and outdoor adventures". Its FAQ describes a "straddle-style wide-tire folding electric bike".

The RS-A02 name covers more than one bike, so tie every figure you read to its store and model. On Samebike's US store the Plus has a 1200 W motor and a 48 V 17 Ah pack, while the RS-A02 Pro beside it has 1000 W and 48 V 15 Ah.

Samebike's European page for the RS-A02 Plus, priced in euros, describes "a powerful 750W motor" and prints 25 km/h. This review covers the US bike: 48 V by 17 Ah gives its 816 watt-hours, on 20 × 4.0 tires.

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

Will the RS-A02 Plus fit you?

On the seat post Samebike draws, the RS-A02 Plus puts the saddle at the fit formula's height for 94 of every 100 riders at 5'6", 91 at 5'8" and 60 at 5'10"; read at Samebike's listed seat heights, it suits 97 at 5'8", 100 at 5'10" and 94 at 6'0".

The two readings part at 5'10" because the drawing puts the post's top setting 2.8 inches below Samebike's listed maximum. At the drawn bar height the median rider leans 20 to 25 degrees forward and rests 18 to 19 percent of body weight on the hands. The model seats the 6,068 bodies of the US Army's 2012 survey on Samebike's drawing, each saddle at 109% of inseam.

Three steps put you on this frame:

1. Measure your inseam in socks, your back to a wall and a hardcover book drawn up snug where a saddle would sit; measure floor to spine.
2. Find your height in both saddle tables below, and check that your inseam sits inside the row's typical range.
3. Set the saddle when the bike arrives with the knee and heel checks at the end of this section.

Samebike prints a recommended height of 5'3" to 6'3" for the RS-A02 Plus on its size-and-fit drawing and on gallery image 24, whose height scale reads 158 and 192 cm (5'2" to 6'4" to the nearest inch), and its FAQ calls the bike "suitable for people of all heights". The tables below set the frame Samebike draws against riders of each height, with its figures beside them.

Samebike's drawing, scaled to its published 44.4-inch wheelbase. The overall length, the lowest seat height read to the seat clamp, the total height and the wheel all agree with Samebike's figures within 3.5 percent; the drawn top seat setting, read the same way, sits 7.4 percent below the listed highest seat height.

Will the saddle go high enough for me?

On the drawn post, yes for 91 to 94 of every 100 riders from 5'6" to 5'8"; the share is 60 at 5'10" and 17 at 6'0". Read at Samebike's listed heights, the post reaches the formula height for 94 of 100 riders at 6'0" and 72 at 6'2".

Each saddle sits at 109% of the rider's inseam above the pedal axle, the formula evaluated by Peveler et al., 2005, and Ferrer-Roca et al., 2012 support settings as low as 106%.

Measured on Samebike's drawing, the crank axle sits 11.1 inches off the ground, the cranks are about 185 mm long and the seat post leans back at 73.3 degrees; the ground-to-saddle heights below build on those three.

Out of 100 riders at each height, how many have a 109% and a 106% saddle height inside the drawn post's 35.5 to 39.5 inches, beside 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 35.5 inches; the riders the drawn post misses at 6'0" sit a median of about 1.2 inches short of the formula, 2.2 at 6'2" and 3.8 at 6'4".

Samebike lists a higher top setting than it draws, so the post was run a second time. Its lowest listed seat height, 31.9 inches, matches the drawn seat clamp at 31.0, and the saddle stands 4.5 inches above that clamp. Read the same way, the listed highest, 37.8 inches, puts the saddle top at 42.3 inches, 2.8 inches above the drawn top:

Riders of 100 at each height whose 109% saddle height each reading of the post reaches. The listed range suits more tall riders and fewer short ones; at 106% of inseam it reaches 96 of 100 riders at 6'2" and 43 at 5'6".

At 5'10" and up the two readings disagree, and the post's real top height decides which one applies to you. Under 5'6", both readings put the lowest saddle above the formula height for many riders; our CY20 Pro review covers the Samebike folder with the lowest seat.

Can I put a foot down at a stop?

Yes, at every height in the table: 95 of every 100 riders at 5'0" clear the frame's lowest top edge, 26.7 inches off the ground, by 0.4 inches or more, and at 5'6" the margin is 3.6 inches.

On the drawing the frame is lowest just in front of the seat post, where a slim tube curves over the main beam; its top edge there is 26.7 inches from the ground.

Clearance is barefoot inseam minus the 26.7 inches at the frame's lowest top edge, taken at the shortest-legged riders of each height: 95 of 100 have at least this much. Shoes add to every figure.

Will I feel cramped, or stretched?

At the drawn bar height the median rider leans 20 to 25 degrees forward of upright, with the grips 28.6 to 33.9 inches above the crank axle and 16.8 to 22.0 inches ahead of it.

Twenty recreational cyclists who compared three trunk angles rated the most upright the most comfortable (Priego Quesada et al., 2017). Every angle below is the smallest forward tilt at which a straight arm reaches the grip from the sit bones, using the torso and arm lengths of each body in the survey.

The median rider's forward lean at each height with the bar where Samebike draws it; the range spans every saddle position and the whole grip cluster.

Samebike's listed total height, 43.3 inches, matches the drawn grips within 2.4 percent, so the bar needs no second reading. On the listed seat range the saddle rides higher for tall riders: at 6'2" the median rider leans 25 degrees there, against 21 on the drawn post.

How much weight goes through my wrists?

About a fifth: with the back fully relaxed, the median rider rests 18 to 19 percent of body weight on the grips at the drawn bar height. Ten road racers riding on their brake hoods put 15% of body weight through the bars in a lab (Carahalios, 2015).

Across 36 riders, hand pressure over the part of the palm the ulnar nerve crosses was highest in the most stretched-out position (Slane et al., 2011). A higher bar or a core that carries the trunk both lighten the wrists.

An upper bound on hand load with the back fully relaxed and the bar where Samebike draws it, from each body's segment weights (Clauser et al., 1969) and the survey's median weight at that height; the range spans every saddle and grip position.

On Samebike's listed seat range the tallest riders sit higher above the grips: at 6'2" the median share there is 21 percent, against 18 on the drawn post.

How do I set the saddle when it arrives?

Aim for a knee bent 25 to 35 degrees with the pedal at the bottom of its stroke (Peveler et al., 2007). No goniometer is needed: with your heel on the lower pedal, raise the saddle until that leg is straight, then ride with the ball of your foot on the pedal.

Of 19 cyclists, the heel method put 70% inside that knee range, more than either inseam formula managed (Peveler et al., 2005). The manual's pre-ride check lists the brake, wheel, handlebar, "folding buckle, quick release part", so tighten the seat clamp and both fold buckles before the first ride.

How we computed fit

Three formulas do the work: the saddle top sits at 1.09 × inseam above the pedal axle; the lean is the smallest trunk angle that lets a straight arm reach the grip; and the hand load weighs head, trunk and arms against how far ahead of the sit bones they hang and how far ahead the grips are.

For a 5'8" rider with the median 32.6-inch inseam, the formula asks for 35.6 inches from the pedal, or 28.3 from the crank axle (88.3% of inseam would give 28.8), which puts the saddle top 38.1 inches above the ground, inside the drawn 35.5 to 39.5.

Every length came off the drawing only after the drawing had reproduced Samebike's own dimensions:

The scale is Samebike's published wheelbase, 1127.8 mm (44.4 in), between axle centers found by fitting a circle to each tire. Four dimensions land within 3.5 percent; the drawn top seat setting misses the listed highest by 7.4 percent, which is why the saddle tables print both readings. Samebike labels the 22.8-inch figure "Tire width" and draws it across the whole wheel.

The motor: 1200 W rated, 1800 W peak

Samebike rates the rear hub at 1200 W, with an 1800 W peak in the product title, on the stat strip and in the specification table. Its motor panel reads: "Equipped with a powerful 1200W motor and Shimano 7S gear system, the maximum torque (N.M) > 100 and the climbing angle is 20 degrees."

The specification table prints "100+Nm", and the range model takes 100 N·m as the motor's ceiling.

The rear hub in Samebike's photograph: a seven-cog Shimano freewheel on the motor, and a Shimano Tourney TZ derailleur below it.

Two ways to get moving. The thumb throttle drives the bike with no pedaling, and the five pedal-assist levels add power while you pedal; the manual numbers the levels 0 to 5, where 0 stops the motor's output, 1 gives the least power and 5 the most, and the display switches on at level 1.

On a hub motor the gear you pick sets your cadence, not the motor's. The hub turns with the wheel in all seven gears, so a shift changes how fast your legs spin, and your battery sees the difference only in the watts your legs contribute; the gear table puts numbers on it.

The battery: 48 V 17 Ah, 816 Wh, removable with a key

Forty-eight volts at 17 amp-hours is 816 watt-hours, and every range figure on this page starts from it; Samebike's battery panel reads "48V 17Ah Battery" beside "UP TO 130KM Pas 1 Mode Range".

The removable pack in Samebike's photograph, part-way out of the frame.

The manual's charging page shows two ways to charge: turn the key, lift the pack out and charge it off the bike, or plug the charger into the bike, where an indicator light confirms the charge. The charger's printed output is 54.6 V 3 A, and 17 Ah at 3 A is 5.7 hours by plain division.

Allow up to 8 hours from empty. Samebike's specification table says 4 to 6 hours and the manual 6 to 8, and an overnight charge covers either.

Divided into the pack, each of Samebike's range figures sets how many watt-hours a mile may use:

816 Wh divided by each figure; the range section finds the steady ride behind each one.

How far the RS-A02 Plus goes on one charge

A full charge carries a 180 lb rider about 48 miles of level pavement at 15 mph on the throttle, 39 miles at 18 mph, and 73 miles at 15 mph with easy pedaling. Held at 10 mph up a steady 4% grade on the throttle, it lasts about 20 miles.

To work out your own figure:

1. Find your speed and how hard you pedal in the first two tables.
2. Add 135 to 170 Wh for each 1,000 feet of climb, the throttle cost at 10 mph in the hill table.
3. Adjust for your weight and the temperature, then plan on 75% of what is left.

The numbers come from one steady-state calculation: Samebike's specifications, a comparable hub motor's published curve from Bafang, drum tests of ten fat tires, and a cycling-power model checked against riders on an open road. The formula subsection repeats one ride step by step.

Does riding faster cut range? Miles at each speed

On level ground on the throttle, speed moves range further than your weight, the cold or the tires do: a charge that covers 66 miles at 10 mph covers 34 at 20 mph, because the power the air takes grows with the cube of speed.

Throttle only on level pavement at 77 °F, with 180 lb aboard the 72.8 lb bike. The right-hand column leaves 25% of the pack unused, as one pedelec did in a standard laboratory range test (Schmitt, Decker and Doppelbauer, 2019).

Your own pedaling is worth more than any other change here: add 75 W at 15 mph and a full charge goes from 48 miles to 73. In these tables easy is 75 W and steady is 150 W. Without the motor, those efforts would push this bike along level ground at roughly 9.1 and 13.2 mph, a quick test of which column describes you.

Miles from a full charge, level pavement, 180 lb aboard. At 15 mph easy pedaling takes 11.2 Wh a mile from the pack, where the throttle alone takes 17.1. The 142-mile figure depends mostly on your own legs and on the motor's losses at light load, the least certain input in the model (Limitations item 4).

An assist level only decides how the controller adds power while you pedal; the miles follow the speed you actually hold and the watts you put in, so read the row that matches your ride.

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

Choose whichever gear your knees like; the battery's share depends on how hard you pedal. The hub spins with the wheel in every gear, so only your watts change the draw:

Watt-hours per mile from the battery, 180 lb rider.

On a climb the low gears earn their keep: a steady 150 W at 12 mph up a 4% grade cuts the battery's share from 42.0 Wh a mile to 24.1, and the easiest cog is what lets you sustain that effort.

Does going uphill drain the battery faster?

Yes: holding 10 mph on the throttle up grades of 4 to 10%, each 1,000 feet of climbing costs 135 to 170 Wh more than the same distance on the flat. The lift alone, 252.8 lb raised 1,000 feet, is about 95 Wh delivered at the rear wheel, and losses in the motor and battery supply the remainder.

Each row holds 10 mph with 180 lb aboard; the middle columns are throttle only and the right-hand one adds 75 W of easy pedaling. The manual lists a "Max Angle of Climb" of 20 degrees.

Split a hilly ride into its flat miles and its climbing, then add them. Ten flat miles at 15 mph on the throttle use about 171 Wh and 500 feet at 6% adds about 73, roughly 245 of the 816 Wh. Stops and wind cost extra, because the model holds each mile at one steady speed.

Does rider weight affect range?

A little on the flat and a lot on a climb. Every added pound loads the tires and the hill, while the air's share stays put, so the gap widens as the road tilts up.

Everything on the bike counts, rider and cargo together, and each row also carries the 72.8 lb bike. Throttle only; the bottom row, 330 lb, is Samebike's load capacity.

Going from 180 lb to 330 lb costs 9 miles on the level at 15 mph, 48 down to 39; on the 8% climb the same step halves the range, 10 miles down to 5.

Does cold weather drain the battery?

Yes: the 15 mph throttle ride that reaches 48 miles at 77 °F drops to about 38 at 32 °F and about 34 at 14 °F.

180 lb rider, level pavement, throttle only. The middle figure in each row follows McMaster University's measurements of an LG HG2 cell discharged at 0.5C at four temperatures (77, 50, 32 and 14 °F), filled in between and taken at air temperature; the bracketed figures show the spread in other published cell tests, which widens below freezing (Limitations item 9).

Below freezing, three effects stack up. At 32 °F the pack holds about 89% of the energy it has at 77 °F, and the air is roughly 9% denser, from the gas law behind the U.S. Standard Atmosphere.

Tires lose some of their bounce in the cold too: the model adds about 0.9% rolling resistance per degree Celsius of cooling, between the rate Rothhämel fitted for a 42 mm tire and the road-tire average from Bicycle Rolling Resistance's temperature test, and stops adding below 41 °F.

Do the tires cut range? Tires and riding position

Your tire choice moves level range at 15 mph between 44 and 55 miles. Bicycle Rolling Resistance tested ten 26 × 4.00 fat tires on its drum (12 psi, 18 mph, 94 lb on the wheel), and they needed 23.2 to 42.1 W; its list has no 20-inch fat tire, so this model takes the median.

Full-charge miles on the level for a 180 lb rider, throttle only. On the drum, Schwalbe's Jumbo Jim LiteSkin rolled easiest of the ten and Kenda's Juggernaut Pro hardest; the RS-A02 Plus wears Kenda 20 × 4.0 tires, the brand on the sidewalls in Samebike's photographs.

The manual leaves pressure to the tire itself, pointing you to the figure printed on it, and names under-inflated tires among the habits that cut range.

Riding posture matters more as speed rises: Tengattini and Bigazzi's roadside measurements put 37 upright cruiser riders at 0.640 m² of drag area, the figure this model uses, and 90 everyday mountain-bikers at 0.603 m². Riding like the second group buys about a mile at 18 mph, 39 to 40.

Samebike's 130 km and 65 km, matched to real rides

Samebike gives four range figures for the RS-A02 Plus, and each describes a different steady ride. The biggest, "UP TO 130KM Pas 1 Mode Range", is quoted for assist level 1.

• 130 km (81 miles), the page's headline: 10.1 Wh a mile, which is easy pedaling at about 14.3 mph on the flat, or steady pedaling near 17.4 mph.
• 56–72 miles, the manual's pedal-assist band: 11.3 to 14.6 Wh a mile, easy pedaling at roughly 15.1 to 17.2 mph.
• 65 km (40 miles), the page's pure-electric figure: 20.2 Wh a mile, or a steady 17.5 mph on the throttle alone.
• 31–34 miles, the manual's pure-electric band: 24.0 to 26.3 Wh a mile, the throttle alone at about 20.0 to 21.4 mph.

So Samebike's biggest numbers assume gentle pedaling, and its smallest a throttle-only ride of roughly 17.5 to 21.4 mph. Its European store's RS-A02 Plus page states that the 130 km comes from a test with a 75 kg (165 lb) rider on flat ground.

Budget three-quarters of the full-charge figure. In a standard laboratory range test, one pedelec used 75% of its nominal energy, the rest held back to prevent deep discharge (Schmitt, Decker and Doppelbauer, 2019), which makes the 48-mile throttle ride at 15 mph a 36-mile plan.

How every figure here is worked out

Cruising at constant speed takes constant power at the rear wheel. For still air, Martin and colleagues (1998) write that power as one equation, and showed it matching riders measured on a real road:

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

Here v is speed, m the mass of rider, cargo and bike together, g gravity, θ the slope, Crr the tires' rolling resistance (0.0105 means a drag of 1.05% of the weight they carry), ρ the air's density, and CdA the drag area, the size of the hole a rider punches through the air.

The calculation walks back from the wheel to the battery in four steps:

1. Your pedaling reaches the wheel through a chain Martin and colleagues put at 97.7% efficient, and the motor supplies whatever is left.
2. The motor borrows its shape from a comparable motor's published data. Bafang's 2021 OEM workbook publishes its RM G0H0 geared hub turning 510 rpm unloaded and 426 rpm at its rated point, at no less than 80% efficiency. The model scales that shape to the RS-A02 Plus's 48 V and 1200 W, sets its no-load speed at 28.0 mph from Samebike's 45 km/h, and caps its torque at 100 N·m.
3. The battery turns a few percent into heat inside the cells, the loss Arango, Lopez and Ceren measured on a 48 V e-bike pack.
4. Watt-hours per mile is the battery's watts divided by the speed in mph, and the miles are the 816 Wh, corrected for temperature, divided by that.

Worked by hand: one throttle-only mile at 15 mph on level pavement, 180 lb aboard. Rolling takes 79.5 W and the air 114.2 W, 193.7 W at the wheel between them.

At that speed the 22.8-inch wheel turns 221 rpm. Built from Bafang's published figures at 48 V, the motor model has a torque constant of 1.112 N·m per amp, 0.253 Ω of winding resistance and a 1.32 A no-load current, so here it makes 8.4 N·m on 8.8 A at 78% efficiency.

After the pack's own losses the cells supply 255.9 W, 17.06 Wh a mile at 15 mph: 816 ÷ 17.06 is 47.8 miles, or 35.9 with a quarter held back.

The checks beneath the model. 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 comparable RM G0H0, and Samebike's product page pure-electric range, which a steady 17.5 mph on the throttle reproduces.

No test of the RS-A02 Plus run to an empty pack, with its speed and load stated, was found to check the chain end to end; Limitations item 5 covers what that leaves open.

Brakes, lights and controls

Samebike's page names hydraulic discs in four places. The specification table lists "Hydraulic disc brakes", the stat strip "Hydraulic Disc Brakes" and the description "hydraulic disc brakes", and the brake panel adds: "Compare with mechanical disc brakes, Hydraulic brakes provide a better braking effect in any condition, ride rain or shine."

Samebike's own brake photograph: the lever and its hose on the left, the front caliper and rotor on the right.

The manual's emergency-stop advice is rear brake first, then front, because grabbing the front brake alone at speed can tip the bike over.

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

A headlight up front, a tail light on the rack, and a horn on the bar. Samebike's headlight panel promises "good illumination whether at dusk or night"; the manual lists an "Electric Horn Installed", and a short press of the display's light key switches the headlight on and dims the screen.

Samebike's lighting photograph: the round SAMEBIKE headlight on, and the tail light across the end of the rack.

The display shows speed (current, maximum and average), trip and total distance, the battery and the assist level, and error codes E001 to E006, which the manual defines. A 2-second press starts the push-assist mode, which moves the bike at under 6 km/h and is only for walking beside it; the USB port supplies 5 V 1 A, and the display switches itself off after 10 idle minutes, all per the manual.

A lockout fork, a rear shock and 20 × 4.0 tires

Both ends are sprung. The specification table lists an "Adjustable front fork+rear suspension" and the stat strip "Fork & Shock Suspension". Samebike calls the fork a "Double Shoulder Fork" and says to "unlock it for bumpy roads to absorb shocks, lock it on flat surfaces for a stable ride"; in its photographs the control is a red "COMPRESSION" knob on the fork crown.

Samebike's suspension photograph: the fork and headlight on the left, the rear shock on the right.

Two parts set the RS-A02 Plus apart from the RS-A02 Pro in Samebike's photographs: the rear shock, a black damper where the Pro shows a red coil spring, and cast wheels where the Pro has wire-spoked ones. Samebike's European version comparison lists a "Hydraulic Shock Absorber" for the Plus and a "Spring Shock Absorber" for the Pro.

The fork crown in Samebike's photograph, the red COMPRESSION knob on the right leg; Samebike's panel says to lock the fork on flat surfaces and unlock it for bumpy roads.

The tires are 20 × 4.0 inches, Kenda on the sidewalls. Samebike's tire panel reads: "Whether it's snow, beach, road, or flat mud, The wide tire design ensures stable riding in any terrain."

Samebike's tire photograph: the 20 × 4.0 Kenda on the cast front wheel, rotor and caliper behind.

The tire table turns rolling resistance into miles.

The fold: 37.8 × 29.1 × 39.8 inches

Folded, the RS-A02 Plus measures 960 × 740 × 1010 mm, or 37.8 × 29.1 × 39.8 inches, the figures in Samebike's specification table and FAQ. The folding panel says "you can put it into your trunk easily"; check your trunk's opening, depth and height against those numbers, the 39.8-inch height above all.

Folded in Samebike's photograph: the two halves side by side, the handlebar upright at the top.

Samebike's image of the folded bike in an SUV's cargo area, a helmet beside it.

The manual pictures the fold in four frames: release each buckle in turn, swing the frame so the two halves meet side by side, and close it up.

Folding shrinks the outline, not the weight: all 72.8 lb still has to be lifted in. At 39.8 inches folded it stands 8.7 inches taller than the RS-A02 Pro, whose fold brings the handlebar down to 31.1 inches.

72.8 pounds to lift, 330 pounds to carry

Samebike weighs the RS-A02 Plus at 33 kg, 72.8 lb, on its specification table, and rates it to carry 150 kg, 330 lb. The manual rounds the bike to 72 lb, and the size chart prints 72.7 lb.

Payload questions come down to one unknown: whether Samebike's 330 lb includes the bike. A 240 lb rider-and-cargo load fits either way, 312.8 lb with the bike; near 257 lb, email us and we will get Samebike's answer in writing first.

It arrives in an 83 lb (38 kg) carton, 57.1 × 11.4 × 28.7 inches (1450 × 290 × 730 mm) per the manual, which is a two-person carry from the curb.

The Mercer fit test

The Mercers are the seven archetype riders every review measures against (meet the Mercers). Their verdicts below use only what Samebike publishes (height window, weight, load capacity) and the fit tables computed from its drawing.

Jack and Frank show where the two seat-post readings split the Mercers. At 5'10", Frank reaches the formula height on 60 of 100 drawn posts and on all 100 at the listed range; at 6'1", Jack's 6 and 85 sit far enough apart that his inseam and Samebike's written answer should come before the order.

The Gray RS-A02 Plus, one of five colors on our listing at $1,199.

Is it UL certified?

The RS-A02 Plus manual carries an "EPAC EN 15194" mark and a CE mark on its last English page. UL 2849 is a different standard: UL Solutions certifies e-bikes to it by testing the electrical drive train, battery and charger as a combination.

If a landlord, building manager or insurer wants to see a UL 2849 certificate, tell us and we will put the request to Samebike before your bike ships.

Has it been recalled?

No. A search of the CPSC's recall database on September 27, 2026 returned nothing for Samebike, for its maker Guangzhou Sameway, or for the RS-A02. Five spellings of the name went against recall titles, product names and manufacturers, and all 623 saved bicycle, e-bike, battery and scooter recalls were read for the model code, while three other brands' known recalls came back as they should.

The same day, the CPSC's site search, which also carries its consumer warnings, returned "No Results." for Samebike and for Sameway, and returned the Commission's warnings for a brand known to have them.

The class question: 1200 W, 45 km/h and a throttle

Samebike's US page assigns the RS-A02 Plus no class, so the definition in your state makes the call. Those definitions weigh three things Samebike publishes: a 1200 W rated motor with an 1800 W peak, a top speed of 45 km/h (28.0 mph), and a thumb throttle that moves the bike without pedaling.

Federally, 15 U.S.C. § 2085 makes low-speed electric bicycles subject to the CPSC's rules for bicycles, 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 Plus manual, each read on September 27, 2026.

If your state's definition turns on a wattage or a top speed, check with us first. Section 2085 leaves open whether its 750 watts is continuous or peak output, and we will get Samebike's written figures for the exact unit you would receive.

The manual also asks riders to check with their insurance company or broker, since an existing policy may not cover riding an e-bike. Our 50-state e-bike law atlas holds each state's definition.

Where you can ride it

A trail signed for class 1 e-bikes only is off-limits to this bike: the federal definition of a class 1 motor is one that "provides assistance only when the rider is pedaling" (43 CFR 8340.0-5(j)(1)), and the RS-A02 Plus has a throttle. Who sets the rules depends on where you are.

Bureau of Land Management rules (43 CFR 8340.0-5) build their three classes on a motor "of not more than 750 watts (1 h.p.)" and leave each area's e-bike access to a written decision by the authorized officer.

Four kinds of ground, four rule books; the bike's spec sheet settles none of them.

On National Forest land, a trail the motor vehicle use map keeps closed is closed to this bike, and the penalty is federal. The Forest Service counts "any vehicle which is self-propelled" as a motor vehicle (36 CFR 261.2), and breaking a Part 261 prohibition can bring "imprisonment of not more than six months", a fine under 18 U.S.C. 3571, or both (36 CFR 261.1b). Get the district's map before you load the bike.

For the places Samebike built it for, "snow, beach, road, or flat mud", our public-land guide sets out each federal agency's e-bike rules.

Green flags / Red flags

Green flags

• $1,199, Samebike's own US price: matched on September 27, 2026, with $1,699 listed as the regular price on all five colors.
• Hydraulic disc brakes: named on the specification table, the stat strip, the brake panel and the description.
• An 816 Wh removable pack: a computed 73 miles at 15 mph with easy pedaling for a 180 lb rider, charged on the bike or off it.
• A lockout fork and a rear shock: suspension at both ends, on 20 × 4.0 Kenda tires and cast wheels.
• A frame low enough to straddle at 5'0": 95 of 100 riders that height clear its lowest top edge, 26.7 inches up.
• Shipping is free, and we handle damage claims: no charge to the contiguous United States, and if the bike arrives damaged and you tell us within 48 hours, we file with the carrier.
• Headlight, tail light, horn, rack and USB port, all fitted as standard.
• A 330 lb load capacity on a 72.8 lb folding frame.

Red flags

Each one is about fit, and each ends with the page to read next.

• Wrong if you are under about 5'4". On both readings the lowest saddle, 35.5 inches as drawn and 36.4 as listed, sits above the formula height for most riders shorter than that; the CY20 Pro's drawn post reaches it for 99 of 100 riders at 5'4", in our CY20 Pro review.
• Wrong until Samebike confirms the post height, if you are 6'0" or taller. On the drawn post 17 of 100 riders at 6'0" reach the 109% height, against 94 on the listed range; send us your inseam and we will get the post's top height in writing, or measure you against the RS-A02 Pro, whose drawn post reaches it for 85 of 100 at 6'0".
• Wrong if your trunk opening is under about 40 inches tall. Folded, the Plus stands 39.8 inches; the RS-A02 Pro folds to 31.1 inches tall, for $999.
• Wrong if your budget stops at $999. The RS-A02 Pro folds on the same 20 × 4.0 tires with a 720 Wh pack at $999, and the LO26 Plus folds with hydraulic discs on 26-inch wheels for the same price.
• Wrong for class-1-only trails. A throttle bike is not allowed on them; our public-land guide covers each federal agency, and we will read your trail's sign with you.
• Wrong for a rider below your state's age minimum. Look up the age in our 50-state atlas, and tell us the rider's age so we can point to a bike on our shelf that qualifies.

Buy it if / Buy something else if

Buy it if you want hydraulic brakes, suspension at both ends and an 816 Wh pack on 20 × 4.0 fat tires that fold into a car; you are between about 5'6" and 5'8", where both readings of the seat post suit most riders, or taller with Samebike's written post height in hand; and your trunk takes a fold 39.8 inches tall.

For $1,199 the RS-A02 Plus brings a 1200 W hub, a removable 816 Wh pack, hydraulic discs, a lockout fork and a rear shock, Kenda 20 × 4.0 tires on cast wheels, seven gears, a thumb throttle, lights at both ends, a horn and a rack.

Our listing offers Shop Pay Installments with sample plans of $108.22 a month for 12 months at 15% APR, $1,298.64 in total, or $409.70 a month for 3 months, $1,229.10 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; if you want the lowest fold, where the RS-A02 Pro stands 31.1 inches folded; or if $999 is the ceiling, where the RS-A02 Pro and the LO26 Plus both sit. At 6'0" and up, read both saddle tables before you choose.

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

Our RS-A02 Pro review, our LO26 Plus review and our CY20 Pro review measure three more Samebike folders the same way, our RS-A08 II review does it for Samebike's full-suspension 26-inch bike, our M20-III review for its two-motor bench bike, our M20 review for the bench bike with the same 1200 W motor rating, our STORM review for the 1000 W step-over with a 960 Wh pack, our CREST review for its step-through twin, and our e-bike reviews hub sorts reviews of other makers' bikes by style, rider and price. Our Samebike brand profile sets all ten Samebikes we stock side by side.

Before you buy: the checklist

Run these eight checks before you spend $1,199; the first three tell you whether the bike suits your body and your roads.

1. Measure your inseam in socks and find your height in both saddle tables; at 6'0" and up, compare the two readings.
2. Look up your state's definition and minimum age in our atlas, then the class signs on your usual paths.
3. Price your usual ride in watt-hours from the range tables and hold back 25%.
4. Measure the trunk or closet against 37.8 × 29.1 × 39.8 inches, the height above all.
5. Plan a two-person unload: 83 lb in the carton, 72.8 lb out of it.
6. Keep rider plus cargo under 330 lb, and ask us if you are near it.
7. Choose a charging spot where the pack can sit for up to 8 hours.
8. Ask your insurer whether your policy covers e-bike riding; the manual recommends it.

Buying it from us

Why buy the RS-A02 Plus from Redtail

Our $1,199 was the price listed on Samebike's US store for all five colors when we compared the two on September 27, 2026. Buying from us adds everything in the table below.

Returns for a change of mind follow our refund policy: the bike must be unopened in its factory-sealed box and the request made within 72 hours of delivery, and a 15% restocking fee plus return shipping applies; canceling an order costs 3%. So ask us every fit and route question first, since the answers cost nothing.

Frequently asked questions

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

About 48 miles at 15 mph on the throttle for a 180 lb rider on level pavement, by this review's computation, or 73 miles pedaling lightly at the same speed and 39 on the throttle at 18 mph; a steady 4% climb at 10 mph cuts it to about 20. Samebike's own headline is up to 130 km (81 miles) at pedal-assist level 1, and the range tables cover the rest.

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

45 km/h (28.0 mph) on Samebike's specification table and stat strip, and "28 Mph" in the manual. Where your state's definition turns on speed, email us and we will get Samebike's written figure for the bike you would receive.

Is the RS-A02 Plus 1200 W or 750 W?

1200 W rated with an 1800 W peak, on Samebike's US specification table and in the product title. The 750W figure comes from the description on Samebike's European RS-A02 Plus page, and 1000 W is the RS-A02 Pro's rating on the US store.

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

It depends on your state, because Samebike assigns it no class. State definitions look at the motor's watts, the top speed and whether a throttle works without pedaling; for this bike those are 1200 W rated (1800 W peak), 45 km/h and yes. Read your state's wording in our 50-state atlas, and the federal definition in the class section.

How much does the Samebike RS-A02 Plus weigh?

It weighs 72.8 lb, the 33 kg on Samebike's specification table; the manual says 72 lb and the size chart 72.7 lb, three roundings of one weight. Its load rating is 330 lb (150 kg), and the delivery carton weighs 83 lb.

Does the RS-A02 Plus have hydraulic brakes?

Yes. Samebike's specification table, stat strip, brake panel and description all name hydraulic disc brakes, and its brake photograph shows a hose running to the lever. The brakes section covers stopping and the manual's emergency-braking advice.

What battery does the RS-A02 Plus have?

It carries a 48 V, 17 Ah pack, 816 Wh, removable with its key. Every range figure on this page is built on that 816 Wh; the battery section has the charging times and what each of Samebike's range numbers asks per mile.

Can you replace the RS-A02 Plus battery?

The pack is designed to come out: turn its key and it slides out of the frame, per the manual. Under Samebike's warranty policy batteries are covered for a year, and after that Samebike offers a prorated credit toward a new one based on months of use. When the time comes, send us your order number and we will source the matching pack.

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

Samebike's specification table says 4 to 6 hours and the manual 6 to 8; the 54.6 V 3 A charger fills 17 Ah in 5.7 hours by plain division. Plan on an overnight charge, on the bike or with the pack removed.

How do you fold the Samebike RS-A02 Plus?

The manual shows it in four steps: open each buckle in turn, bend the bike so its two halves meet, and finish the fold. Folded, it measures 37.8 × 29.1 × 39.8 inches (960 × 740 × 1010 mm).

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 Plus has the bigger motor and pack, 1200 W and 816 Wh against 1000 W and 720 Wh, hydraulic discs where the Pro's specification table lists mechanical, and 45 km/h against 40, for $1,199 against $999. In Samebike's photographs the Plus rides on cast wheels with a rear damper, the Pro on spoked wheels with a red coil shock; both weigh 33 kg.

What rider height fits the RS-A02 Plus?

Samebike prints 5'3" to 6'3" on its size chart and says the bike suits "people of all heights". On its drawing, a 5'8" rider with the median 32.6-inch inseam needs the saddle 38.1 inches off the ground, inside both the drawn post (35.5 to 39.5 inches) and Samebike's listed range read at the clamp (36.4 to 42.3); from 6'0" the readings differ (the fit tables).

Does the Samebike RS-A02 Plus have a throttle?

Yes: a thumb throttle, listed on Samebike's specification table and pictured at the right grip, alongside five pedal-assist levels. The range tables put a number on what the throttle and your pedaling each cost.

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

It has a lockout fork, a rear shock and 20 × 4.0 tires, and Samebike says the wide tires suit "snow, beach, road, or flat mud". Whether a given trail is open to it depends on that trail's posted rules; the trail section shows who writes them.

What tire pressure does the RS-A02 Plus use?

The manual sends you to the tire for the figure, so inflate within the range printed on the 20 × 4.0 Kenda sidewalls; it counts low pressure among the habits that shorten range, and the tire table prices rolling resistance in miles.

Where do I find the RS-A02 Plus manual?

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

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

Yes, through Shop Pay on our listing: sample plans of $108.22 a month for 12 months at 15% APR, $1,298.64 in total, or $409.70 a month for 3 months, read September 27, 2026 and subject to an eligibility check by Affirm's lending partners.

Is Samebike a legit brand?

Samebike is the brand of Guangzhou Sameway Electric Bicycle Co., Ltd., which its about page dates to 2004. The CPSC's recall database and site search held no recall or warning naming Samebike on September 27, 2026, and every figure in this review comes from Samebike's US store or its manual.

Limitations of this review

Eighteen questions this review cannot settle on its own, numbered so you can weigh each one before you buy, with what would settle it where we know.

1. Redtail sells this bike. Weigh the red flags as carefully as the green ones.
2. This is a specification-verified review: its figures come from Samebike's published documents, federal texts, our store record, the research the range and fit sections cite, or arithmetic on this page.
3. Each range figure is one steady ride at a single speed and grade, with no wind or stops; stop-start riding and headwinds cost more, tailwinds less.
4. Bafang's published motor stands in for Samebike's. The documents read here name no motor maker and give no no-load speed or efficiency curve, so the model keeps the shape of Bafang's RM G0H0 at the RS-A02 Plus's 48 V and 1200 W, unloaded at 28.0 mph. At 82% efficiency in place of 80%, the 15 mph throttle figure rises from 48 miles to 53; with the comparable at a 750 W rating, it reads 49.
5. No measured ride checks the whole chain. The physics reproduces Martin and colleagues' worked example, the motor reproduces Bafang's 80% at its rated point, and Samebike's 65 km pure-electric figure matches a steady 17.5 mph throttle ride; a ride of the RS-A02 Plus to empty with its speed, load and weather stated would test the rest.
6. The torque ceiling is Samebike's "100+Nm". The model uses 100 N·m, above the comparable motor's published 90 N·m.
7. Every figure assumes the full 816 Wh. How much of the pack the battery management system releases is not stated in the documents read here; one measured pedelec gave up 75% in a standard test (researchers at KIT), the source of the 25% reserve.
8. The tire coefficient is borrowed; the wheel is Samebike's. 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. The 22.8-inch wheel is Samebike's "Tire width" figure, drawn across the whole wheel; circles fitted to the drawn tires read 22.0 inches.
9. The cold figures rest on one cell's laboratory data. The documents read here name no cell maker for the RS-A02 Plus, so the central line uses McMaster University's LG HG2 data, bracketed by other published cells, with the cells at air temperature.
10. The fit figures rest on a measured drawing. 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 four of Samebike's own dimensions agree within 3.5 percent.
11. Two readings of the seat post are printed. Samebike lists seat heights of 31.9 to 37.8 inches; its drawing matches the lowest at the seat clamp but draws the top setting 2.8 inches lower. The main saddle table uses the drawn post and the second uses the listed range read at the clamp; a written answer from Samebike on the post's top height would settle which applies.
12. The riders are soldiers. All 6,068 bodies are from the Army's 2012 ANSUR II survey rather than the general public; if your build is unusual for your height, the tables fit you less exactly.
13. The hand load is an upper bound. It lets the upper body hang on the arms; engaging your core to hold the trunk up lowers it.
14. Samebike's documents sometimes give two values for the same thing; the other value is listed here. Charge time: 4–6 hours on the specification table, 6–8 hours in the manual. Range: 65–130 km on the page, 31–34 and 56–72 miles in the manual. Unfolded size: 1.7 × 0.66 × 1.1 m on the specification table, 1710 × 660 × 1100 mm in the manual and FAQ. Wheelbase: 44.4 in on the size-and-fit list, 1130 mm on gallery image 24. Rider height: 5'3"–6'3" on the drawing and gallery image 24, whose scale reads 158 and 192 cm, and "suitable for people of all heights" in the FAQ. Warranty: the warranty policy lists 3 years on the frame and 1 year on batteries, motors and other accessories, the product page's policy block reads "12 Months Warranty" and its FAQ "1-3 year". Motor: 1200 W on the US store, "750W" in the description on Samebike's European store. Rear shock: a black damper in Samebike's photographs and a "Hydraulic Shock Absorber" in its European comparison, while the size-and-fit drawing sketches a coil spring. Email us and we will ask Samebike which applies to the bike you order.
15. Whether the 330 lb includes the bike is open. Rider plus cargo of 257.2 lb or less fits under either reading.
16. Certification: the manual shows EN 15194 and CE marks. No UL 2849 certificate number appears on the US product page, the product record or the manual; we will request one from Samebike on your behalf.
17. The recall check is the CPSC's US record, under the names listed; a recall filed under a different company name would not show.
18. Price and stock change. Both were read from our listing and Samebike's store on September 27, 2026.

The bottom line

For $1,199, the RS-A02 Plus gives you a 1200 W rear hub, a removable 816 Wh pack, hydraulic disc brakes, a lockout fork and a rear shock, Kenda 20 × 4.0 tires on cast wheels, seven gears, a thumb throttle, five assist levels, lights at both ends and a rack, on a frame that folds to 37.8 × 29.1 × 39.8 inches.

A 180 lb rider on level pavement gets about 48 miles at 15 mph on the throttle and 73 pedaling easily. Samebike publishes 1200 W and 45 km/h for it and lists no class, so your state decides where you may ride it.

It fits riders of about 5'6" to 5'8" on either reading of its seat post, lets a 5'0" rider straddle the frame with both feet down, and asks riders of 5'10" and up to confirm the post's top height. Through Shop Pay on our listing it comes to $108.22 a month for 12 months at 15% APR, subject to an eligibility check.

Before you order, tell us your height, inseam and usual route. We'll reply with your saddle and grip positions, your ride's watt-hours against the 816, and what the posted rules on your paths say about throttles.

Source register

The tier beside each source names the authority behind it: T1 is law, regulation or government data, T2 is an organization's own publication about its products, terms or measurements, and T3 is peer-reviewed research or a standards body.

Expiry conditions

This page goes out of date when any of these change: the price, specification, range figures or size-and-fit drawing on Samebike's US page for the RS-A02 Plus; Samebike's written answers on the post's top height, the certificate, the delivered speed and power, or the load basis; or the price, stock or Shop Pay terms on our listing.

Federal or recall news does the same: an amendment to 15 U.S.C. § 2085, a class published by Samebike for this model, or any CPSC recall or warning naming Samebike or Sameway. Verified September 27, 2026.

References

Each document cited on this page, with its publisher, title, the part relied on and the date it was retrieved; the two computations of this review are listed last, with the sections that set them out.

1. SAMEBIKE US (Guangzhou Sameway Electric Bicycle Co., Ltd.), RS-A02 Plus Off Road Peak 1800W Fat Tire Foldable Electric Bike — product page (stat strip; description; Specifications table; Size and Fit drawing and list; feature panels; gallery; FAQs). Retrieved September 27, 2026. https://us.samebike.com/products/rs-a02-plus-off-road-peak-1800w-fat-tire-foldable-electric-bike
2. SAMEBIKE US (Shopify product record), RS-A02 Plus — product record (.json) (variants[].price, compare_at_price, sku; images[]). Retrieved September 27, 2026. https://us.samebike.com/products/rs-a02-plus-off-road-peak-1800w-fat-tire-foldable-electric-bike.json
3. Guangzhou Sameway Electric Bicycle Co., Ltd. (SAMEBIKE), All terrain fat tire electric bicycle — User Manual, Model: RS-A02 Plus (English section) (1 Important warning; 2 Unpacking and specs; 3 Product components; 4.6 Folding procedure; 5.1 Charging method; 5.2 LCD Display; 6 Preparation before riding; back page). Retrieved September 27, 2026. https://cdn.shopify.com/s/files/1/0684/9173/9372/files/RS-A02_Plus.pdf?v=1780732404
4. SAMEBIKE US, Warranty Policy ('Frame warranty for 3 years, batteries, motors and other accessories warranty for 1 year'; 'Batteries'). Retrieved September 27, 2026. https://us.samebike.com/pages/warranty-policy
5. SAMEBIKE US, About Us (company paragraph). Retrieved September 27, 2026. https://us.samebike.com/pages/about-us
6. SAMEBIKE EU, RS-A02 Plus Fat Tire Off Road Ebike — product page (European store) (description; stat strip; battery panel; Version Comparison table). Retrieved September 27, 2026. https://samebike.com/products/samebike-rsa02plus-foldable-off-road-ebike
7. SAMEBIKE US, RS-A02 Pro Off Road Peak 1500W Fat Tire Foldable Electric Bike — product page (Specifications table; variants). Retrieved September 27, 2026. https://us.samebike.com/products/rs-a02-pro-off-road-peak-1500w-fat-tire-foldable-electric-bike
8. US 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. Bureau of Land Management, Department of the Interior, 43 CFR Part 8340 — Off-Road Vehicles, § 8340.0-5 (§ 8340.0-5(a)(5)(iii) and (j)(1)). Retrieved September 26, 2026. https://www.ecfr.gov/current/title-43/subtitle-B/chapter-II/subchapter-H/part-8340
10. Forest Service, Department of Agriculture, 36 CFR Part 261 — Prohibitions (§ 261.13). 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. Department of Agriculture, Forest Service (Office of the Federal Register, eCFR), 36 CFR 261.2 Definitions (§ 261.2, 'Motor vehicle'). Retrieved September 26, 2026. https://www.ecfr.gov/current/title-36/chapter-II/part-261/subpart-A/section-261.2
12. U.S. Department of Agriculture, Forest Service (Office of the Federal Register, eCFR), 36 CFR 261.1b Penalty (§ 261.1b). Retrieved September 26, 2026. https://www.ecfr.gov/current/title-36/chapter-II/part-261/subpart-A/section-261.1b
13. US Consumer Product Safety Commission, CPSC Recall REST service, saferproducts.gov (RecallTitle, ProductName and Manufacturer queries; 623-record corpus). Retrieved September 27, 2026. https://www.saferproducts.gov/
14. US Consumer Product Safety Commission, cpsc.gov site search (queries Samebike and Sameway, with a known-positive control). Retrieved September 27, 2026. https://www.cpsc.gov/search?search_api_fulltext=Samebike
15. Redtail eBikes, Samebike RS-A02 Plus Folding Fat Tire Electric Bike — product listing (price, variants, Shop Pay installments block). Retrieved September 27, 2026. https://redtailebikes.com/products/samebike-rs-a02-plus
16. Redtail eBikes, Shipping policy (Processing & delivery; Receiving & damage claims; Where we ship). Retrieved September 27, 2026. https://redtailebikes.com/policies/shipping-policy
17. Redtail eBikes, Refund policy (Change-of-mind returns; Order cancellations). Retrieved September 27, 2026. https://redtailebikes.com/policies/refund-policy
18. Redtail eBikes, Terms of service (delivery inspection paragraph). Retrieved September 27, 2026. https://redtailebikes.com/policies/terms-of-service
19. Affirm, Inc., Affirm's lending partners (lending partners page). Retrieved September 27, 2026. https://www.affirm.com/lenders
20. BAFANG, BAFANG Workbook OEM 2021 (PDF p.23, MOTORS table, H640 column (RM G0H0.750.DC / RM G0H0.1000.DC)). Retrieved September 23, 2026. https://www.bafang-e.com/Uploaded/Labels/BAFANG%20Workbook%20OEM%202021.pdf
21. Bicycle Rolling Resistance (Jarno Bierman), Fat Bike Tires Test Results ('Rolling Resistance 12 psi (default)' column, the 26 x 4.00 rows). Retrieved September 25, 2026. https://www.bicyclerollingresistance.com/fat-bike-reviews
22. Bicycle Rolling Resistance (Jarno Bierman), Kenda Juggernaut Pro 2016 (Rolling Resistance Test Results). Retrieved September 25, 2026. https://www.bicyclerollingresistance.com/fat-bike-reviews/kenda-juggernaut-pro-2016
23. CRR at Different Temperatures: Examining Temperature Dependence of Rolling Resistance. Bicycle Rolling Resistance (Jarno Bierman), results paragraph. Retrieved September 23, 2026. https://www.bicyclerollingresistance.com/specials/crr-temperature-test
24. U.S. Standard Atmosphere, 1976 (NOAA-S/T 76-1562). NOAA, NASA, US Air Force, Table 3 (composition); sea-level values (1976-10). Retrieved September 23, 2026. https://ntrs.nasa.gov/api/citations/19770009539/downloads/19770009539.pdf
25. 2012 Anthropometric Survey of U.S. Army Personnel (ANSUR II), public data release 2017. U.S. Army Natick Soldier Research, Development and Engineering Center, public data files (male 4,082 rows, female 1,986 rows); TR15-007 tables (2017). Retrieved September 26, 2026. https://www.army.mil/article/188601/for_good_measure_natick_releases_raw_data_from_army_wide_anthropometric_survey
26. Clauser, McConville & Young, Weight, volume, and center of mass of segments of the human body, AMRL-TR-69-70. Aerospace Medical Research Laboratory, Wright-Patterson AFB, segment weight and center-of-mass tables (13 cadavers) (1969-08). Retrieved September 25, 2026. https://ntrs.nasa.gov/api/citations/19700027497/downloads/19700027497.pdf
27. UL Solutions, E-Bikes Certification: Evaluating and Testing to UL 2849 (service summary). Retrieved September 26, 2026. https://www.ul.com/services/e-bikes-certificationevaluating-and-testing-ul-2849
28. Martin JC, Milliken DL, Cobb JE, McFadden KL, Coggan AR. Validation of a Mathematical Model for Road Cycling Power. Journal of Applied Biomechanics (Human Kinetics), 14(3):276-291, Eq. 14 and Appendix I; 'chain drive system (Ec) was 97.698' (1998-08-01). Retrieved September 23, 2026. https://collections.lib.utah.edu/dl_files/b4/8e/b48ef26086091662c561e673d7bd990d77868437.pdf
29. Rothhamel M. On rolling resistance of bicycle tyres with ambient temperature in focus. International Journal of Vehicle Systems Modelling and Testing (Inderscience), volume 17, pages 67 to 80; Table 1 and Table 4 (2023). Retrieved September 23, 2026. https://www.inderscience.com/filter.php?aid=132317
30. Tengattini S, Bigazzi AY. Physical characteristics and resistance parameters of typical urban cyclists. Journal of Sports Sciences (Taylor & Francis), 36(20):2383-2391, Table 4 (2018). Retrieved September 23, 2026. https://civil-reactlab.sites.olt.ubc.ca/files/2022/11/Tengattini_2018_Physical-characteristics-and-resistance-parameters-of-typical-urban-cyclists.pdf
31. Arango I, Lopez C, Ceren A. Improving the Autonomy of a Mid-Drive Motor Electric Bicycle Based on System Efficiency Maps. World Electric Vehicle Journal (MDPI), 12(2):59, Eq. (40) (2021). Retrieved September 23, 2026. https://mdpi-res.com/d_attachment/wevj/wevj-12-00059/article_deploy/wevj-12-00059.pdf
32. Schmitt M, Decker S, Doppelbauer M. Measuring and Characterization of a Pedal Electric Cycle (Pedelec) on a Full System Test-Bench. IEEE / EPE'19 ECCE Europe (Karlsruhe Institute of Technology authors), 'Distance' section and Fig. 7 (2019). Retrieved September 26, 2026. https://publikationen.bibliothek.kit.edu/1000100371/50695920
33. LG 18650HG2 Li-ion Battery Data. McMaster University (Kollmeyer et al.), Mendeley Data, raw cycler files Dis_0p5C at -20, -10, 0, 10, 25, 40 C, recomputed (2020). Retrieved September 23, 2026. https://doi.org/10.17632/b5mj79w5w9.2
34. Peveler W, Bishop P, Smith J, Richardson M, Whitehorn E. Comparing Methods For Setting Saddle Height In Trained Cyclists. JEPonline 8(1):51-55. Journal of Exercise Physiology Online (American Society of Exercise Physiologists), Methods (the Hamley and LeMond paragraph); Results (the 25-35 degree accuracies, n=19) (2005-02). Retrieved September 26, 2026. https://www.asep.org/asep/asep/JEPonlineFEBRUARY2005_PevelerSaddle.doc
35. Ferrer-Roca V, Roig A, Galilea P, Garcia-Lopez J. Influence of saddle height on lower limb kinematics in well-trained cyclists: static vs. dynamic evaluation in bike fitting. J Strength Cond Res 26(11):3025-9; doi 10.1519/JSC.0b013e318245c09d. Journal of Strength and Conditioning Research (NSCA), abstract (2012-11). Retrieved September 25, 2026. https://pubmed.ncbi.nlm.nih.gov/22190163/
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