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

    Top speed20 mph

  • Icon 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

    Payload275 lb

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


4.5 (1053 reviews)

RadExpand™ 5 Electric Folding Bike

Our rugged fold-and-go model is built for big fun — and small spaces.

Ships within 2 business days

Color: Black
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Build difficulty: Medium

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

Fold in to store. Fold out to explore.

Our fan-favorite folding ebike has fat tires to tackle adventures and a small profile for easy storage. Featuring a step-thru frame, you can customize your ride with adjustable handlebars, seven speeds, and four levels of pedal-assist.

"I love the fact that this is such an approachable and affordable bike."

Electric Bike Review

"The most exciting e-bike of 2022 is way cheaper than you’d expect."

Dive deeper

Select a feature to explore in detail.

Side view of a black RadExpand 5 electric folding bike
Safety & quality

Engineered to put safety first

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

Close-up of grip and brake lever on a Rad Power Bike.

Safety certified

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

RadExpand 5

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


Katya's measurements: bike inseam 30"/ 76cm, height 5'4'/ 163cm

Design driven

Each piece designed for a purpose.

Woman walking out of store with a cup of coffee and books, walking towards her step-thru RadExpand folding electric bike

Easy to get on & off

As the smallest ebike in our lineup, you can simply step thru and ride. No need to swing your leg over the saddle — or struggle to make it over your gear.

A man carries a folded RadExpand ebike out of a trailer

We lightened the load

Our engineers zeroed in on reducing the bike's weight, making it even easier to fold, lift, and store.

Close up of the wide front tire on a RadExpand ebike

Fearlessly fun

Dirt-caked roads, look out. Rugged fat tires help you tackle rough terrain.

A man relaxes in an RV next to a folded black RadExpand ebike

An RV-ready ebike

In a tight spot? The RadExpand is a smart fit for RVs, small apartments, or anywhere else you may be short on space.

Rad accessories

So many ways to ride Rad.

RadExpand electric folding bike with handlebar bag, large front basket, large basket roll top liner and phone mount installed.
Black RadExpand with a phone mount, mirror, small basket and fat tire wheel lock installed.
Black RadExpand with a phone mount, mirror, large front basket, and fat tire lock installed.

Going on an adventure

Enhance your journeys. Enhance your possibilities.

Shop Accessories

The essentials

The must-haves that ensure every ride is a great one.

Shop Accessories

Daily commuter

Get where you need to go with the right accessories for errands and commuting.

Shop Accessories
Smiling woman in a pink helmet riding a RadExpand electric folding bike, which is outfitted with a basket, basket bag and mirror.
Smiling woman in a pink helmet riding a RadExpand electric folding bike, which is outfitted with a basket, basket bag and mirror.

Reliable service and support.

Truck icon in a yellow circle

Free, fast shipping

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

Learn More
Shield with check mark on a yellow background

2-year warranty

Ride in confidence. We’ve got you covered.

Learn More
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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

RadExpand™ 5 Electric Folding Bike Reviews


  • Battery

    14Ah 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

  • Display

    LED display. 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: LED headlight
    Rear: Integrated taillight with brake light

  • Pedal Assist

    Pedal cadence sensor, 4 PAS Levels, plus a zero assist option

  • Range

    Estimated 25 - 45 miles per charge

  • Throttle

    Half twist throttle

  • USB Port

    No 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

    Mechanical caliper

  • Brake Pads

    Semi-Metallic compound

  • Brake Rotors

    180 mm

  • Crank Set

    48T with dual-sided chainring guard, 170 mm crank arms

  • Derailleur

    7-Speed MicroShift RD-M26

  • Fenders

    Full coverage front and rear fenders

  • Fork

    Fixed, Rad custom steel 135 mm hub width, 9 mm quick release

  • Frame


  • Freewheel/Cassette

    7-speed freewheel, 14-32T

  • Gearing

    1x7 speed

  • Grips

    Ergonomic rubber comfort grips

  • Handlebar

    Alloy, 27" wide

  • Kickstand

    Side-mounted, heavy-duty aluminum with wide plastic foot

  • Pedals

    Composite platform, CrMo axle with reflectors, standard 9/16" x 20 TPI threading

  • Rear Rack

    Integrated, 55 lb (25kg) carrying capacity

  • Saddle

    Rad Power Bikes with lifting handle

  • Seatpost

    Aluminum alloy, 390 mm x 27.2 mm

  • Seatpost Clamp

    31.8 mm diameter

  • Shifter

    MicroShift TS71-7, 7-speed thumb shifter

  • Stem

    45 mm length, + 3º rise.

  • Tires

    CST BFT 20" x 4.0"

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 4'10" - 5'10"
(Approx. bike inseam between 24.5" - 32.25")
Bike Weight 62.5 lb, 54.8 with battery removed
Payload 275 lb
Rear Rack Payload 59 lb
Folded Dimensions 29H x 25W x 41L"
Handlebar Height 45-48"
Reach 16"
Seat Height From ground: 29"–36"
From pedal bottom stroke: 24" - 31"
Standover Height 16"
Total Length 68"
Wheelbase 45"
Seat Tube Length 16"


Bike inseam sizing chart(Inches)

23 - 24.5"

24.5 - 32.25"


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.


  • LED panel that includes pedal assist controls and battery charge levels.