Defiant Folding Electric Fat Tire Bike - JupiterBike

CYBER WEEK - $1295 Atlas or Summit Electric Bike

28 MPH
25-40+ MILE

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

(24 reviews)

  • $1495.00

  •   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


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 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
1 Year Limited

Customer Reviews

(24 reviews)

5 out of 5 stars

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  Defiant Review

By tbip on July 14, 2022

After a little over a year my review of the Defiant... I have spent more time on my bike that I ever have, it brought the fun back to biking. With a few very minor tweaks it became even more solid: - Kinect Seat-Post for an even smoother ride - Snow Air Fork - Brooks Seat You can go a pretty good distance on level 1, approximately 30 to 40 miles depending on the terrain. Overall, I highly recommend this VERY SOLID bike and I would definitely buy again. Pound for pound a bargain.

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123 of 134 people found this review helpful

  3500 miles on her and just about as many smiles

By mooseknuckle51 on June 27, 2022

Six months ago I left this review on Google maps. I can't say enough good about this company and the commitment to quality of product, service and consumer relations. Customer Service has been excellent in answering my questions or concerns usually within a couple hours of email if not the same day... I highly recommend this company and their products... proud owner of a JupiterBike Defiant. Almost 1200 miles on it and looking forward to many more. I now have over 3500 miles on my Defiant and have had a wonderful experience with the Tech Department and Customer Service when any concerns have popped up they have done a good job at addressing my concerns and getting me rolling again.

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106 of 118 people found this review helpful

  Decisions, Decisions, Decisions...

By boatflorida on June 13, 2022

I bought the Discovery X5 (2 of them) for the boat and they do everything we expected. The Discovery X7 is perfect for the RV too. But the Defiant is the preferred choice for my sons (they are in their 30's). Love the support/service as we travel - any bike shop can repair or fine-tune any issues we've experienced.

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108 of 119 people found this review helpful

  Awesome Bike, Awesome Service, Great RV Bike!!

By tbridges201248 on May 10, 2022

Received my JupiterBike Defiant in 3 days! Bike is all and more of what I had searched for and more! Built like a tank! Customer Service 100% Happy Camper! Thank you Rob!! The E-Bike is way too fast for me, but may have the need for speed to keep up with the kids. Lol. Btw, speed control is adjustable for your safety. I am 345 lbs. Pulls me just fine. Just need a wider seat for bigger chops. Lol The actual seat that comes with it is fantastic for small butted people. I'm 5'5" and the center bar is just perfect to get on or off the bike. Just ordered the cool rear cargo rack to go with it. Oh btw, order the safety chain lock, its awesome! It rides great, but I don't intend to be in a bumpy yard or riding rough trails. So the smoothness of the ride will be fantastic in RV parks and trails. Did many nights and days of research to find the perfect E-Bike for the money and product reviews. This is it"...The Jupiter Defiant". Seriously, thinking 🤔 about buying another Defiant E-Bike for my roommate next week. Kind-a waiting on a discount to come about on the second one. Just hoping 🙏 Very Satisfied Customer!! Thank you for your customer service! Ask for Rob! He's "the man"!!! JupiterBike Company Location: Tampa, FL USA

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123 of 138 people found this review helpful

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