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RadWagon 4

Electric Cargo Bike

Electric Bike Review award badge

Winner, Best Electric Cargo Bike of 2021
Ebikes from Rad Power Bikes were named the Best Electric Bikes in 7 categories by ElectricBikeReview.com, the most of any electric bike company.

Standard: Arrives 85% assembled (Free)

White Glove: Delivered fully assembled and tuned (Additional fee)

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Contact Customer Support

Our expertly trained Customer Experience team is here to help.
(800) 939-0310 x1

RadWagon Accessory Bundle

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Let Us Do the Heavy Lifting

It’s the strongest and most versatile version of the RadWagon yet, featuring smaller, innovative new tires developed by our in-house team of expert engineers to achieve a lower center of gravity. Its patent-pending new frame design ensures multiple points of adjustability, including a telescopic seat post and easily maneuverable handlebars.

This is a next-level hauler designed for those who are loading up to go somewhere, whether that’s taking the kids on a trip across town or a weekend visit to the hardware store or farmer’s market. With a standover height 2.4 inches lower than its predecessor and a 750W geared hub motor, the RadWagon 4 is in it for the long haul.

View All Technical Specs

Technical specs

Key Features
RadWagon Electric Cargo Bike Version 4key feature 2

New With RadWagon 4

Smaller, Wider Tires

All-new 22" x 3" tires designed in-house by Rad Power Bikes' team of product engineers and manufactured by VEE Tire Co. provide a lower center of gravity. Features a custom tread pattern that provides a smooth ride over uneven surfaces, withstands bumps, and handles the elements with ease.

RadWagon Electric Cargo Bike Version 4key feature 3

New With RadWagon 4

750W Geared Hub Motor 

Provides twice the torque as the direct drive hub motor found on previous RadWagon models, making uphill hauling and quickly getting up to speed from a stop easier.

RadWagon Electric Cargo Bike Version 4key feature 4

New With RadWagon 4

Telescoping Seatpost

Equipped with a telescoping seatpost with a 375 mm maximum length that's capable of accommodating riders between 5'1"-6'4".

RadWagon Electric Cargo Bike Version 4key feature 5

New With RadWagon 4

Adjustable Handlebars 

An adjustable handlebar stem allows riders to customize the reach, height, and handlebar angle (up to 80 degrees) with zero tools.

RadWagon Electric Cargo Bike Version 4key feature 6

7-Speed, 11-34 Tooth Freewheel

A wide range of gearing at your disposal means more torque for steep climbs and maintained pedal authority at top speed.

RadWagon Electric Cargo Bike Version 4key feature 7

Reflective Tire Sidewall Striping

Extremely durable and with a larger total reflective surface and better visibility than traditional spoke-mounted reflectors.

RadWagon Electric Cargo Bike Version 4key feature 8

Integrated Brake Light

Powered using the main battery pack and featuring brake light functionality that activates any time the brakes are applied.

RadWagon Electric Cargo Bike Version 4key feature 9

Integrated Rear Rack

Attach panniers, platforms, or baskets and let the bike carry your cargo -- up to 120 pounds. Or mount a Yepp Maxi child seat, Caboose, or Deckhand to bring up to two kids along for the ride.

RadWagon Electric Cargo Bike Version 4key feature 10

Twist Grip Throttle

750W of power on-demand allows you to only use the throttle when you don't want to pedal. Ideal for starting from a stop when your bike's loaded with cargo.

RadWagon Electric Cargo Bike Version 4key feature 11

180 mm Mechanical Disc Brakes

Tektro Aries brakes provide you with strong stopping power, even in loose or wet terrain.

48V, 14 Ah (672 Wh) with Lithium NMC Samsung 35E cells, rated for 800 charge cycles

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

48V, 750W

Backlit LCD with charge indicator, speedometer, odometer, trip odometer, pedal assist level, wattmeter, and more

Hub Motor
Geared Hub Motor with 5:1 Planetary Reduction

Auto-on feature
Front: Rad Power Bikes branded standard LED 20 lux (~200 Lumens)
Rear: Integrated taillight with brake light indicator functionality

Pedal Assist
Intelligent 5 level pedal assist with 12 magnet cadence sensor

25-45+ miles per charge (estimate)

Half twist grip throttle

Water resistant connectors and wiring harness

USB Ports
Display: 5V, 1 Amp

Bike Components
Brake Calipers
Tektro Aries (MD-M300)

Brake Levers
Aluminum alloy comfort grip levers with motor cutoff switch

Brake Pad Material

Brake Rotors
Tektro 180 mm front and rear

160 Link

Crank Set
46T chainring; 170 mm crank length; square-taper J.I.S.; dual-sided chainring guard

7-speed Shimano

Full coverage front and rear fenders with hardware included

Rigid steel fork for 22" wheel

6061 aluminum

7-speed freewheel, 11-34T

1 x 7-speed

Velo comfort rubber ergo grips

Swept-back, RPB custom

Semi-integrated, 1-1/8" straight steerer tube

Dual leg, spring loaded, steel

forged aluminum platform with reflectors, standard 9/16" x 20 TPI threading

Shinning DB-X50, alloy, double wall, black powder coated, 36 hole

Plush with lifting handle

Satori telescoping seatpost, Telescoping, max length = 440 mm x 34.9 mm

Seatpost Clamp
Quick release

Shimano thumb shifter, 7-speed

12 gauge, stainless steel

Satori EZ3 AHS toolless adjustable handlebar stem with built in top cap bolt. Reach, height (stack), and handlebar angle adjustment (80 degrees) with press of a button/lever lift.

Rad Power Bikes, custom 22" x 3"
Manufacturer: VEE Tire Co.

RadWagon Electric Cargo Bike Version 4 geometry
Recommended Rider Heights
5'1" - 6'4"

Frame Size

Handlebar Height
43.5" - 47.2"

Handlebar Reach
21.6" - 25" (550 mm - 635 mm)

Seat Height
27" - 37" (690 mm - 940 mm) (adjustable)
*Measured from bottom of the pedal stroke

Standover Height
23.6" (60 cm)

Total Length
78.7" (2000 mm)

53.76" (1365.7 mm)

Dropout Width
Front: 135 mm
Rear: 175 mm

Bottom Bracket Shell Width
84 mm

Seat Tube Length
13.5" (345 mm)

29" (739 mm)

Handlebar Width
27.5" (700 mm)

Crank Length
170 mm

Seatpost Diameter
34.9 mm

Max Tire Width

Bike Weight
76.7 lb (34.8 kg)

Payload Capacity
350 lb (158 kg)

Rear Rack Capacity
120 lb (54 kg)

Running Boards Capacity
30 lb per side (optional accessory)

Rad Power Bikes sizing chart

What to Measure

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

This will typically be an inch or two longer than the length of your trousers, but you’ll want to 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:

  1. Medium-width hardcover book
  2. Tape measure
  3. A wall you can stand against
  4. 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 Technology
RadWagon Electric Cargo Bike Version 4 display
Battery Life
A fuel gauge for your electrons.

Pedal Assist Level
The higher the number, the more the motor will boost you when you pedal.

USB Charging
5V, 1 Amp port to charge your phone or portable electronics on the go.

Calculate how many miles you didn't drive this year and how much money you saved on gas.

Can be set to current speed, max speed, or average speed.

Shows how much power the motor is outputting at any given time.

Rad Battery Pack

The Rad Battery Pack

With over a decade of designing and building ebikes under our belts, we know that a high-capacity battery like this isn’t something you cheap out on. We designed and built our batteries using genuine Samsung 35E cells, which are some of the most energy-dense and reliable lithium-ion cells on the market today. These cells have allowed us to build an overall better battery, and at only 7.7 lb, it's one of the lightest and most energy-dense packs on any electric bike.

Miles per Charge
5-6 Hours
To Fully Charge
672 Wh
Total Battery Capacity

Powerful, Effective Geared Hub Motor

For the first time ever, the RadWagon now features a geared hub motor, which provides twice the torque compared to the direct drive motor used in previous models. This motor, which can be found on several of our off-road and utility-oriented models, offers improved uphill hauling and helps riders quickly get up to speed from a stop. Whatever your ride calls for, you can complete your mission in confidence — even with up to 350 lb of cargo.

Motor Power
80 Nm
Max Motor Torque
Geared Hub Motor
Turn Off the Lights Black RadWagon 4 lights on