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Radster™ Road Electric Commuter Bike

Radster™ Road Electric Commuter Bike



15Ah 720 Wh Safe Shield Advanced Semi-Integrated Battery, Samsung 50GB or LG M50LT cells, UL Certified to UL-2271


48VDC, 2 Amp Rad Power Bikes smart charger, operates on 100V-240V AC power outlets


Class switchable 1 to 3. Ships in Class 2 status.


Rad custom color display. See Display section below for details.

Hub Motor

Rear hub 750W, 100 Nm torque

Stated wattage is the manufacturer’s rated power capacity. Actual power-to-ground wattage is under 750W to ensure ebike regulatory compliance and may vary depending on riding conditions.


Auto-on feature

Front: ~200 lumens LED headlight with built-in reflector

Rear: Integrated taillight with brake light and turn signals

Pedal Assist

Torque sensor, 5 PAS Levels, plus a zero assist option


Estimated 25-65 miles per charge


Half twist throttle

USB Ports

One USB-C port, located on remote

To ensure uninterrupted shipping, some parts may differ from those listed. Rest assured, our engineers rigorously test each component to guarantee quality and compatibility.




Brake System

Tektro Hydraulic Disc E350

Brake Pads

Tektro Semi Metallic P20.11

Brake Rotors

180 mm x 1.8 mm

Crank Set

50T with dual sided chain ring cover, 170 mm crank arms


Shimano 8-speed


Full coverage aluminum alloy fenders with chain guard


SR Suntour hydraulic suspension fork, 80mm travel, tapered steerer tube, thru axle




8-speed freewheel 11-34T


1x8 speed


Ergonomic rubber comfort grips


Aluminum, 710 mm wide


Side mounted, adjustable angle kickstand


Alloy Platform, Boron axle with reflectors, standard 9/16" X 20 TPI threading

Rear Rack

Integrated, 55 lb (25 kg) carrying capacity


Padded sport saddle with shallow anatomic cut-out and contoured sides


Regular: 350 mm x 31.6 mm

Large: 400 mm x 31.6 mm

Seatpost Clamp

38.1 mm


Shimano 8-speed thumb shifter


70 mm A-head


Kenda Kwick Series 29" X 2.2" with Puncture Protection and reflective strip

To ensure uninterrupted shipping, some parts may differ from those listed. Rest assured, our engineers rigorously test each component to guarantee quality and compatibility.




Bike graphic showing the measurements of the Radster Road electric commuter bike, size regular


Rider Heights4'11"-5'8" (150-173 cm)

Bike Weight74.5 lb (33.8 kg), 65.5 lb (29.7 kg) with battery removed

Payload320 lb, (290 lb. max rider)

Rear Rack Payload55 lb (25 kg)

Handlebar Height44" (111.8 cm)

Reach15.2" (386 mm)

Seat HeightFrom ground: 30.5" - 38" (78.7 - 96.5 cm)

From pedal bottom stroke: 25" - 33" (64 - 84 cm)

Standover Height22" (55.9 cm)

Stepover Height19.75" (50.2 cm)

Total Length75.5" (191.8 cm)

Wheelbase46.6" (118.3 cm)

Seat Tube Length15.0" (380 mm)




Bike inseam sizing chart(Inches)

23 - 25"

25 - 33"


You will not be able to ride the bike comfortably.

You will be able to pedal and stand over the frame comfortably.

Your legs may be too long to get full leg extension when pedaling.

What to Measure

Your “bike inseam” — or inside leg length — is the distance between your body where it sits on your bike saddle and the ground.

It’s typically an inch or two longer than the length of your trousers, but measure to be sure.

You’ll use this number on the chart to get a feel for how the different models will fit you.

How to Measure

Gather the tools needed:

Medium-width hardcover book

Tape measure

A wall you can stand against

A trusted friend or relative

Wearing your regular riding shoes and with your back to the wall, stand with your feet spread so there is about 7 inches between them - this is about the distance apart your feet would be when straddling a bike with your feet on the ground (standover height).

Place a hardcover book against the wall with the spine of the book facing upward. Slide the book upwards towards your groin until it is solidly against your body. This may be a bit awkward, but is way more comfortable — and safer! — than trying to ride a bike that is too big.

If you have a buddy helping you, get them to measure from the floor to the top of the book spine while you hold the book in place. If you’re going it alone, carefully hold the book in place and measure from the ground to the top of the book spine.


Class level

Choose speed settings for your ride:

Class 1: up to 20 mph, throttle only works while pedaling.

Class 2: up to 20 mph while pedaling or throttling.

Class 3, Limited: up to 25 mph while pedaling.

Class 3: up to 28 mph while pedaling.

Remember: adhere to posted speed limits and check local regulations for any speed or ebike class restrictions on the road or trail you're using.

Control lock

For an extra layer of security, lock and unlock the controls with the touch of a fob or a personal security code


Fast and Curious? The speedometer will tell you your current speed.


Track the distance you’ve racked up, either by trip or through the bike’s entire lifespan.

Estimated remaining range

Is it time to recharge? To help you keep track, this displays your remaining battery life in either percentage or remaining miles.

Trip time

Did your trip feel like it was just half an hour, or did time fly by? This display will show you the time you spend on each outing. Be sure to reset your trip odometer before a ride you want to track.

Pedal assist level

The higher the number, the more the motor will boost you when you pedal. This shows what level you’re on, from 0 to 5.

Motor watts

Check out how much power the motor is supplying at any given time.

Headlight, tail light, and rear turn signals

It’s always a bright idea to make sure your lights are on and operating.

Note: Rear turn signals can be manually turned off or will turn off automatically two minutes into use.

USB charge indicator

Charging your device? This will confirm if your phone (or tablet, or smartwatch, or headphones, or …) is getting the juice it needs.

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