RadWagon 4 Electric Cargo Bike

The Trusted Cargo Carrier

The minivan has met its match.

RadWagon 4 Electric Cargo Bike

Holds the kiddos. Plus groceries.

This next-level hauler is perfect for taking the kids across town or loading up at the hardware store. The electric cargo bike's elongated frame and lower center of gravity provide stable, reliable rides, even when you’re taking full advantage of the 350 lb. payload capacity. Take a passenger (or two!) for a spin. Our family-friendly accessories get the whole gang outside.

"Best Electric Cargo Bike"

Electric Bike Review

"RadWagon 4 is the best electric cargo bike we've tested."

Outdoor GearLab
What’s the range?

Up to 45 miles+ per charge

How much can it carry?

350 lb.

How powerful is the motor?


Ebikes built to handle your everyday.

Size guide

Tailor-fit comfort. For every rider.


30" bike inseam

Slide the scale for your bike inseam measurement


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

Chelsey's measurements: bike inseam 26"/ 66cm, height 5'4"/ 163cm

Dive deeper

Select a feature to explore in detail.

RadWagon 4 Electric Cargo Bike
Design driven

Each piece designed for a purpose.

Built to share

Whose turn is it to take the kids? Either way, the ecargo bike’s adjustable handlebar and telescoping seat posts let you quickly achieve a custom fit for either parent.

Master of the drop-off line

Maneuver easily - even when loaded up! Our in-house team of engineers kept a low center of gravity for balanced, stable rides.

Put the ‘go’ in ‘cargo’

Max out the RadWagon's impressive 350-lb. payload capacity by strapping on bulky items, attaching panniers, platforms, or baskets.

Your minivan may get jealous

Create the ebike setup ideal for you and your crew by adding a childseat, caboose, deckhand, running boards, and more.

Safety & quality

Engineered to put safety first

Explore our first-class safety features for all rider types.

We go the extra mile.

Rad frames are designed to meet international standards, including the guidelines set by the U.S Consumer Product Safety Commission and European Committee for Standardization.

Reliable service and support.

Free, fast shipping

Wait less, ride more. Enjoy fast, free shipping on all ebike orders.

Learn More

1 year warranty

Ride in confidence. We’ve got you covered.

Learn More

Ask our experts

Can’t choose a bike? Need to fix a flat? We’re here to help.

Learn More


  • Battery

    672 Wh

  • Charger

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

  • Controller

    48V, 750W

  • Display

    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. 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: 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

  • Range

    24-45+ miles per charge (estimate)

  • Throttle

    Half twist grip throttle

  • Wiring

    Water resistant connectors and wiring harness

  • USB Ports

    Display: 5V, 1 Amp

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 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

  • Chain

    KMC Z7

  • Crank Set

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

  • Derailleur

    7-speed Shimano

  • Fenders

    Full coverage front and rear fenders with hardware included

  • Fork

    Rigid steel fork for 22" wheel

  • Frame

    6061 aluminum

  • Freewheel

    7-speed freewheel, 11-34T

  • Gearing

    1 x 7-speed

  • Grips

    comfort rubber ergo grips

  • Handlebar

    Swept-back, RPB custom

  • Headset

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

  • Kickstand

    Dual leg, spring loaded, steel

  • Pedals

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

  • Rims

    Shinning DB-X50, alloy, double wall, black powder coated, 36 hole
    Rim width: 45mm

  • Saddle

    Plush with lifting handle

  • Seatpost

    Telescoping, max length = 375 mm x 34.9 mm

  • Seatpost Clamp

    Quick release

  • Shifter

    Shimano thumb shifter, 7-speed

  • Spokes

    12 gauge, stainless steel

  • Stem

    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.

  • Tires

    Rad Power Bikes, custom 22" x 3"

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


Title Text
Rider Heights 5'1" - 6'4"
(Approx. bike inseam between 24.5" and 36.25")
Frame Size 13.5"
Handlebar Height 43.5" - 47.2 in"
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)
Wheelbase 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)
Chainstay 29" (739 mm)
Handlebar Width 27.5" (700 mm)
Crank Length 170 mm
Seatpost Diameter 34.9 mm
Max Tire Width 4.0"
Bike Weight Total: 76.7 lb (with battery)
Battery: 7.7 lb
Payload Capacity 350 lb
Rear Rack Capacity 120 lb
Running Boards Capacity 30 lb per side (optional accessory)


Bike inseam sizing chart(Inches)

23 - 24.5"

24.5 - 36.25"


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.


  • 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.

  • Odometer

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

  • Speedometer

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

  • Wattmeter

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


The wagon leaves riders smiling