Defiant Folding Electric Fat Tire Bike - JupiterBike

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28 MPH
25-40+ MILE
UL2849 Certified

48 volts matched with a 1130 watt (peak) 750 watt (sustained) motor delivers more power when you need it. Instant torque for uphill, sand, snow, or any high performance need.

Tire rugged

The all terrain fat tires on the Defiant are designed to easily roll over any terrain. Grip sand, snow, or any terrain with 4" fat tires.

Ride all day with the Defiant electric fat tire bike's impressive 40+ mile range. Go even farther, quick swap the battery to double your range.

This product has given my freedom back to me.

- James F.

It handles the cold like a polar bear.

- Moose

Handles very well and has an impressive amount of torque!

- Christopher C.









Defiant Fat Tire Folding Electric Bike

(33 reviews)

  • $1499.00

  •   Fast and Free Shipping

Defiant Key Features

High end materials and attention to detail makes the Defiant a step above the rest for appearance, reliability, and comfort. On the trail or on the road, the Defiant handles it all beautifully.

All-Terrain Fat Tire

All-Terrain Fat Tire

The Defiant's 4" x 20" all-terrain fat tire powers through snow, sand, mud, or whatever your trail throws at you. Sturdy knobs on wheels are perfect for both on and off-road riding. Brand may vary.

Concealed Removable Battery

Concealed Removable Battery

Charge things up when you're on the go. The Defiant features a removable battery hidden in the center frame that locks with a key. Keep it safely stored, or take it out and recharge, worry-free.

Twist Throttle Grip

Twist Throttle Grip

Get power on-demand with the variable speed twist throttle grip. High torque power is available on demand! Press the button under the left grip for loud electric horn.

Bright 5 Speed Display

Bright 5 Speed Display

Easy to read even in full daylight, the Defiant's LCD display shows you your speed, distance traveled, pedal assist level, and battery life all in a clean design. Choose between 5 levels of Pedal Assist.

4 Bulb LED Headlight

4 Bulb LED Headlight

Bright adjustable front headlight for low light conditions. Powered from the Defiants's main Lithium Ion battery, improves visibility & safety.

7 Speed Shimano Derailleur

7 Speed Shimano Derailleur

The Defiant features the 7 Speed Shimano Tourney Derailleur for manually pedaling your bike. Use the 7 Speed Thumb Shift Lever to rapidly shift between the gears on the rear cassette.

Quick Release Front Wheel

Quick Release Front Wheel

Quickly detach the front wheel for quick storage and transportation options.

Front and Rear Disc Brakes

Front and Rear Disc Brakes

Superior performance and smooth stopping power. The Defiant's dual 160mm stainless steel disc brakes provide even, reliable braking.

Dual Spring Comfort Saddle

Dual Spring Comfort Saddle

Dual spring suspension, mesh top, and a middle opening for breathability. The Defiant comes stock with the amazing JupiterBike Upgrade Seat.

Quick Release Front Wheel

1130 Watt (Peak) 750 Watt (Sustained) High Torque Motor

Dominate any terrain and climb hills effortlessly with this ultra powerful geared hub motor. A major boost to the enjoyment of your ride.

Front & Rear Fenders

Front & Rear Fender Mudguards

Fenders make a huge difference when you are riding on roads that are wet from drizzle, recent rain, or snowmelt.
*Fenders not included on refurbished Defiant bikes.

Rear Cargo Rack

Rear Cargo Rack*

Take your cargo with you with the Defiant Rear Cargo Rack. Built tough from aluminum alloy and mounted directly to the Defiant frame. A must have for any commuter. *Optional accessory

Defiant qtr left v2 Defiant pro qtr left black Defiant st left profile
Model Defiant Fat Tire Folding Electric Bike Defiant PRO Fat Tire Folding Electric Bike Defiant ST Fat Tire Folding Electric Bike
Wheel 20" x 4" Spokes 20" x 4" Rims 20" x 4" Rims
Max Speed 20 mph / adjustable to 28 mph 20 mph / adjustable to 28 mph 20 mph / adjustable to 28 mph
Max Range 40 miles 40 miles 50 miles
Lithium Ion Battery 48V 10.4Ah 48V 10.4Ah 48V 13.2Ah
Suspension None Front Front & Rear
Drivetrain 7 Speed 7 Speed 7 Speed
Geared Hub Motor 1130W (Peak)
750W (Sustained)
1130W (Peak)
750W (Sustained)
1130W (Peak)
750W (Sustained)
Throttle Twist Thumb Thumb
Derailleur Shimano Tourney Shimano Altus w/ Paddle Shifter Shimano Altus w/ Paddle Shifter
Brakes Mechanical Hydraulic Hydraulic
Fender Sport Full City Style Full City Style
Grips Rubber Leather Leather
Rear Rack Optional MIK Compatible Included MIK Compatible Included


Tackles Any Terrain
Folds Down for Travel
Easy to Remove Battery
7 Speed Shimano Drivetrain
750 Watt (Sustained) Hub Motor
Travel 20-40+ Miles on a Charge


Max Speed: 20 mph / Adjustable to 28 mph
Battery: 48V, 10.4Ah Li-Ion
Motor: 750 Watt (1130 watt peak) Hub Motor
Water Resistance: IP54 Safe in Rain & Spray
Brakes: Front and Rear Disc
Wheels: 20" x 4" Fat Tire
Folded: 38" x 22" x 28"
Unfolded: 65" x 22.5" x 48"
Product Weight: 55 lbs
Weight Limit: 300 lbs
Wheel Base: 42" (front to rear axle)
Cross Bar Height (step over): 29 inch
2 Years Bike and Battery

Customer Reviews

(33 reviews)

5 out of 5 stars

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  Greatest bike ever!

By tjkays1 on June 01, 2024

We have had our two Defiant bikes now for about a year. We have been on all kinds of different terrain and trails. These bikes are awesome! They have handled everything we have tried so far and we love them. The fat tires give some shock absorption and handle sand, lose gravel well. We are in the process of upgrading our bikes with front suspension and can’t wait to try them out with the front shocks. I am a little heavier than my wife so my battery doesn’t last quite as long as hers but we can get 40 plus miles on one charge. We ride hilly trails and have a blast just riding together enjoying our time. These are by far the best bikes you can buy and we are so happy we purchased Jupiter! The service has been outstanding also. I want to especially thank Mathew Russell for the customer support he has given us with purchasing the upgraded front forks. Thanks Jupiter for making such a great bike.

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135 of 169 people found this review helpful

  Great Bike

By buerklep8484 on May 17, 2024

We love this bike-so much so that we purchased another one and have recommended to our neighbors.

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136 of 162 people found this review helpful

  Good service

By mendezmendez002 on February 08, 2024

Every time I have gone to buy an electric bicycle all the sellers are friendly and always helpful and help me with what I need

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109 of 139 people found this review helpful

  Jupiter Defiant

By derekpappalardo8 on February 08, 2024

Great customer service, Will and Neal made the process very easy and delightful.

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118 of 144 people found this review helpful

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