RadMini Step-Thru 2
Electric Folding Fat Bike
• In stock, ships next business day
Winner, Best Folding Electric Fat Bike of 2020
Ebikes from Rad Power Bikes were named the Best Electric Bikes in 7 categories by ElectricBikeReview.com, the most of any electric bike company.
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Hear from Real Rad Owners
Most popular accessories
Front Rack
$69.00
ABUS Bordo Granit X-Plus 6500
$179.00
SR Suntour SP12 NCX Seatpost
$109.00
The Rugged Space Saver
The new RadMini Step-Thru 2 encompasses so much of our design philosophy: to make bikes that combine power with ease, convenience, and accessibility. With a streamlined throttle design and handlebars that have been upgraded for a more comfortable, ergonomic ride, we’ve taken that mindset to a whole new level.
The RadMini Step-Thru features our lowest standover height of any model. Add to that the adjustable handlebar stem and the most robust folding mechanism ever built, and you've got a remarkably accessible fat tire ebike.
Geared Hub Motor
Miles per Charge (estimate)
Lithium-Ion Battery
Payload Capacity
Technical specs
Puncture-Resistant Tires
The integrated tire liner is a line of defense designed to provide extra protection against punctures from thorns, glass, and other small materials.
7-Speed, 11-34 Tooth Freewheel
A wider range of gearing at your disposal means more torque for treacherous uphill climbs and maintain pedal authority at top speed.
Front and Rear Fenders
Included front and rear fenders made from durable PVC and stainless-steel hardware help protect you from the elements
Integrated Brake Light
Powered using the main battery pack and features brake light functionality that is activated any time the brakes are applied.
Twist Grip Throttle
750W of power on-demand.
Front Suspension Fork
Our custom Rad Power Bikes RST suspension fork has 60 mm of travel, preload adjustment, and lockout.
The Strongest Hinge Ever Made for a Folding Ebike
Over-built on purpose, the primary folding hinge has multiple safety redundancies to help prevent accidental unlatching and ensure the RadMini Step-Thru feels solid and secure when locked properly.
Low-Step Frame
Featuring a 16" stand over height, this bike is perfect for those needing a more approachable package without sacrificing features or functionality.
48V, 14 Ah (672 Wh) with Lithium NMC Samsung 35E cells, rated for 800 charge cycles
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
750W brushless Bafang geared hub motor with 80 Nm of torque, 5:1 planetary gear reduction
Lights
Front: Standard Rad Power Bikes LED headlight
Rear: Integrated taillight with brake light
Pedal Assist
Intelligent 5 level pedal assist with 12 magnet cadence sensor
Half twist throttle
Wiring
Water resistant connectors and wiring harness
USB Ports
Display: 5V, 1 Amp
Tektro Aries (MD-M300)
Brake Levers
Aluminum alloy comfort grip levers with motor cutoff switch and integrated bell
Brake Pad Material
Sintered metal
Brake Rotors
Tektro 180 mm front and rear
Chain
KMC Z7
Crank Set
48T, 170 mm ProWheel Pioneer forged alloy, dual-sided aluminum bashguard
Derailleur
7-Speed Shimano Altus
Fenders
Front and rear
Fork
RST spring fork, 80 mm travel, with lockout and preload adjustment
6061 aluminum
Freewheel
DNP 7-speed freewheel, 11-34T
Gearing
1 x 7-speed
Grips
Durable imitation leather ergonomic grips
Handlebar
Custom formed aluminum, 26" wide, 2.5" rise
Headset
Semi-integrated, 1-1/8" straight steerer tube
Kickstand
Heavy-duty aluminum with wide plastic foot
Pedals
Wellgo P256 CrMo axle, forged aluminum folding platform with reflectors, standard 9/16" x 20 TPI threading
Racks
Optional
Double wall, 36H
Saddle
Velo Plush with lifting handle
Seatpost
Promax, 350 mm x 27.2 mm
Seatpost Clamp
Quick release
Shifter
Shimano SL-TX50-7R thumb shifter, 7-speed
Spokes
12-gauge stainless steel, black
Stem
High-rise folding stem with 3" vertical adjustment
Tires
CST Big Boat 20” x 3”, puncture-resistant liner
4'10" - 5'10"
Frame Size
14"
Handlebar Height
45" - 48" (adjustable)
Handlebar Reach
16"
Seat Height
24" - 31"
*Measured from bottom of the pedal stroke
Standover Height
16"
Total Length
68"
45"
Dropout Width
Front: 135 mm
Rear: 170 mm
Bottom Bracket Shell Width
100 mm
Square Taper Bottom Bracket
Seat Tube Length
14.5"
Top Tube Length (effective)
n/a
Headtube
4.75"
Chainstay
19"
660mm (26")
Crank Length
170 mm
Seatpost Diameter
27.2 mm
Max Tire Width
4.25"
Bike Weight
69 lb
Payload Capacity
275 lbs
Folded Dimensions (LxWxH)
42" x 23" x 30"
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:
- 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.
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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.
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 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 lbs, it's one of the lightest and most energy-dense packs on any electric bike.
Miles per Charge
To Fully Charge
Total Battery Capacity
Compact, Discreet, Maintenance-Free Hub Motor
With 750W and 80 Nm of torque at your disposal, this Bafang geared hub motor is what is going to help power you up steep inclines and get you up to top speed quickly from a dead stop, all while remaining quiet and inconspicuous. These kinds of numbers aren't even found on some of the most expensive mid drive systems out there, so prepare to outperform and outclass everyone you see on the road.
Motor Power
Max Motor Torque
Winner, Best Folding Electric Fat Bike of 2020
"This is a unique bike, there just really isn't a lot on the market that's like this, especially at this price point."
- ElectricBikeReview.com
Looking for something more traditional?
The RadMini 4 is a great option if you want many of the same features as the RadMini Step-Thru but with a mid step frame.
