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Juggernaut Ultra FS pro

Top-of-the-line components and the most powerful torque sensored mid-drive motor in the industry make the Juggernaut Ultra FS eBike the best-built full-suspension electric bike available.

Product features

Bafang M620 Ultra Mid-Drive System

The Bafang M620 system features the G510 electric motor with over 1500 watts of peak power, 160Nm of torque and torque-sensing assist. This allows you to span cities, climb hills, and explore all the places you want to go with ease.

Rear Suspension

The rear suspension sets the Ultra FS Pro apart from the rest of our lineup, making it the ultimate eBike. Take on any trail with maximum comfort and control.

Removable Lithium-Ion Battery

Our removable battery system offers unmatched convenience for re-charging. With the twist of a key, your battery can be brought inside and set to charge.

11-Speed Drivetrain

The SRAM NX 11-speed drivetrain has the versatility to provide max torque while climbing hills and max speed on the flats.

Hydraulic Disc Brakes

When it's so easy to go fast on an electric bike, you need strong stopping power. These hydraulic disc brakes will swiftly and reliably bring you to a halt.

26" x 4.0" Fat Tires

Whether you're up against sand, mud or snow, these tires will handle it with ease. The Juggernaut Ultra FS Pro is ready for all-season, all-terrain riding.

Colour LCD Display

The LCD Display shows you all kinds of important information about your ride including speed, battery life, range, odometer, pedal assist level, and more.

Front Light

Light the path with the front light powered by the bike's battery. It can be turned on/off on the handlebar control pad. The light is upgradable to the Biktrix Armageddon 2000 lumen light

Thumb-Throttle & Control Pad

With just a push of the thumb you can access the motor's full power! No need to pedal, just sit back and enjoy the ride. The control pad allows you to turn the bike on/off and adjust your settings.

Technical Specifications

Size & Fittings

17" Boost 17" Fat 18.5" Boost 18.5" Fat Tire

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Customer Reviews

Based on 102 reviews
Jack Stinson
FS Pro

I love it!

Shayne baldwin
Im the bionic fatman!

Well, i am 54 years old and not at fighting weight anymore but also not completely out of shape. I was looking for some help in the woods of Medford Massachusetts . Boy was i impressed. WOW! this thing is invincible. If anyone has any doubts about biktrix it is unfounded. I dare you to pedal 5 miles at 32mph sustained on a regular fat tire bike. Many smiles per mile. Thankyou biktrix!

Troy Steele
Best bike at almost any price

I absolutely love my Biktrix. It was such a good value and shipped to me extremely quickly. After the first couple rides and comparing it to my friends bikes, I realized it’s the best bike at almost any price. It’s so good now I have to get my wife one. Sincerely, Thank you Biktrix!


Amazing bike, my wife and I now both have this model and couldn’t be happier!- Even with the distance from the factory in Canada they have provided great customer service with all of our questions and issues! Well done Biktrix!

William Douglas
As promised

The bike arrived a week early, which was a pleasant surprise. It was undamaged, and the assembly was straight forward. The quality seems good across the board. The motor is powerful, and the power comes on smoothly. The brakes are incredible. The suspension works well, although I haven’t gotten onto the dirt yet. I am still adjusting the fit, with a new seat, and raising the handlebars. I am very long waisted. It’s been 30 years since I was on a bicycle, so I’m taking it slowly. So far so good, and I have zero complaints at this time.

Manuel Lowenhaupt
Unstoppable bike

My 4th ebike and the most powerful by far. Can go anywhere with speed and stability. Great machine.

Jeff Doyle
All the fun of a mountain bike, dirt bike, and motorcycle in one!

This bike is amazing and so versatile, I’ve ridden gravel cycling trails, mountain single tracks, and roads with it. The motor power and battery life is equally excellent. Unboxing and setup were simple and enjoyable getting to learn a bit about the bike. I added the 4 piston brakes, armageddon headlight, and rear fender. I’m 150lb and 5’ 8.5” and went with the 17” frame. The fit is perfect. I also bought an extra THULE bike trailer adapter and drilled it out slightly for the larger fat tire axle and it works great.

Awesome bikes

Awesome bikes! My son and I started out with two Aventon Rear hub motor bicycles. That was fun for a while but grew to want something more so I was looking at the mid drives and bumped into the Biktrixx FS pro ultra and bought one. Once my son wrote it he wanted to sell his event in and buy one as well, we love the bikes the suspensions great the throttle response is great they’re quick they climb hills fantastically, we just love them. However that being said I’d be curious to know if anyone else has this issue but when our batteries run close to the 30% battery life left we experience power drops to zero, yes from roughly 30% straight to zero losing all power . We will shut the bikes off turn them back on and it will read back to 30% or somewhere close to that the bike will begin to move but just for a short short time and then it cuts out again. We both bought our bikes with a few barns in between each purchase and they’re both doing it , I’ve got some more tests to do Biktrixx has responded in an oppressive way, just love their customer service and their willingness to help hoping to solve this problem to get the battery not to cut out at 30% curious if anyone else has had this problem. That aside we really love the bikes .

Charles Mason

Great bike , I love the sports mode when going up hills!!!

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