Electronics

  • 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

    180mm x 1.8mm

  • Crank Set

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

  • Derailleur

    Shimano 8-speed

  • Fenders

    Front and full rear alloy mudguard

  • 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, 710mm 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

    40mm A-head

  • Tires

    Kenda Havok 27.5" X 3.0" with puncture protection and tan sidewall

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

 
Bike graphic with the measurements for a Radster Trail electric off-road bike, size regular
Rider Heights 4'11"-5'8" (150-173 cm)
Bike Weight 77.5 lb (35.2 kg), 68.5 lb (31.1 kg) with battery removed
Payload 370 lb, 290 lb. max rider
Rear Rack Payload 55 lb (25 kg)
Handlebar Height 44.5" (113.0 cm)
Reach 15.2" (386 mm)
Seat Height From ground: 30.5" - 37.5" (78.7 - 95.3 cm)
From pedal bottom stroke: 25" - 33" (64 - 84 cm)
Standover Height 21" (53.3 cm)
Stepover Height 20" (50.8 cm)
Total Length 74" (188 cm)
Wheelbase 46.6" (118.3 cm)
Seat Tube Length 15.0" (380 mm)

Sizing

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.