Radster™ Road Electric Commuter Bike

Battery
15Ah 720 Wh Safe Shield Advanced Semi-Integrated Battery, Samsung 50GB or LG M50LT cells, UL Certified to UL-2271
Charger
48VDC, 2 Amp Rad Power Bikes smart charger, operates on 100V-240V AC power outlets
Class
Class switchable 1 to 3. Ships in Class 2 status.
Display
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.
Lights
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
Range
Estimated 25-65 miles per charge
Throttle
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.
Components
Bell
Yes
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
Derailleur
Shimano 8-speed
Fenders
Full coverage aluminum alloy fenders with chain guard
Fork
SR Suntour hydraulic suspension fork, 80mm travel, tapered steerer tube, thru axle
Frame
Aluminum
Freewheel/Cassette
8-speed freewheel 11-34T
Gearing
1x8 speed
Grips
Ergonomic rubber comfort grips
Handlebar
Aluminum, 710 mm wide
Kickstand
Side mounted, adjustable angle kickstand
Pedals
Alloy Platform, Boron axle with reflectors, standard 9/16" X 20 TPI threading
Rear Rack
Integrated, 55 lb (25 kg) carrying capacity
Saddle
Padded sport saddle with shallow anatomic cut-out and contoured sides
Seatpost
Regular: 350 mm x 31.6 mm
Large: 400 mm x 31.6 mm
Seatpost Clamp
38.1 mm
Shifter
Shimano 8-speed thumb shifter
Stem
70 mm A-head
Tires
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.
Geometry
 Regular
Large
Bike graphic showing the measurements of the Radster Road electric commuter bike, size regular
TitleText
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)
Sizing
 Regular
Large
Bike inseam sizing chart(Inches)
23 - 25"
25 - 33"
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.
Display
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
Speedometer
Fast and Curious? The speedometer will tell you your current speed.
Odometer
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.