• Speedometer icon to represent the top speed of this electric bike model

    Top speed20 mph

  • Battery icon with a lightning bolt to represent the max range of this electric bike model

    Range45+ miles

  • Lightning bolt icon to represent the motor power of the electric bike


  • Icon of a weight to represent the payload capacity of the electric bike

    Payload350 lb

  • Shield icon to represent the warranty for Rad Power Bikes electric bikes


4.4 (2025 reviews)

RadWagon™ 4 Electric Cargo Bike

The minivan has met its match. Meet our trusted cargo carrier.

$1,599 $1,799
Ships within 2 business days

Color: Black
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Build difficulty: Hard

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*Shipping fees and restrictions may apply in Alaska and Hawaii, see checkout.

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
Dive deeper

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RadWagon™ 4 Electric Cargo Bike
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.

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

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.

Rad accessories

So many ways to ride Rad.

Replace the minivan

Bring the crew and their gear. Choose an orange or blue child seat.

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Everyone pile in

RadGrins are meant to be shared. Now you can do so with multiple passengers.

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Do it all

Getting from Point A to Point B has never been this easy - or fun.

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Reliable service and support.

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Free, fast shipping

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

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Shield with check mark on a yellow background

2-year warranty

Ride in confidence. We’ve got you covered.

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Explore our Help Center

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

Learn More

RadWagon™ 4 Electric Cargo Bike Reviews


  • Battery

    14 Ah 672 Wh external battery
    Bikes shipped to NYC are compliant with UL 2849 and 2271.

  • Charger

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

  • Class

    Class 2

  • Display

    Backlit LCD. See Display section below for details.

  • Hub Motor

    Rear hub 750W
    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

    Estimated 25-45+ miles per charge

  • Throttle

    Half twist throttle

  • USB Ports

    One port

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


  • Bell


  • Brake System

    Tektro Aries (MD-M300)

  • Brake Pads

    Tektro metallic

  • Brake Rotors

    Tektro 180 mm

  • Crank Set

    46T with dual sided chain ring cover, 170 mm crank arms

  • Derailleur

    7-speed Shimano

  • Fenders

    Full coverage front and rear fenders, plus wheel cover

  • Fork

    Rigid steel fork for 22" wheel

  • Frame


  • Freewheel/Cassette

    7-speed freewheel, 11-34T

  • Gearing

    1 x 7-speed

  • Grips

    Ergonomic rubber comfort grips

  • Handlebar

    Swept-back, RPB custom

  • Kickstand

    Dual leg center stand, spring loaded, steel

  • Pedals

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

  • Rear Rack

    Integrated, 120 lb (54.4 kg) carrying capacity

  • Saddle

    Plush with lifting handle

  • Seatpost

    Telescoping, max length = 375 mm x 34.9 mm

  • Seatpost Clamp

    Quick release

  • Shifter

    Shimano, 7-speed thumb shifter

  • 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")
Bike Weight Total: 76.7 lb., 69 lb. with battery removed
Payload 350 lb.
Rear Rack 120 lb.
Running Boards Payload 30 lb per side (optional accessory)
Handlebar Height 43.5" - 47.2 in"
Reach 21.6" - 25" (550 mm - 635 mm)
Seat Height From ground: 31.5" - 41.3"
From pedal bottom stroke: 27" - 37"
Standover Height 23.6" (60 cm)
Total Length 78.7" (2000 mm)
Wheelbase 53.76" (1365.7 mm)
Seat Tube Length 13.5" (345 mm)
Seatpost Diameter 34.9 mm


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.