Juggernaut Ultra FS

Sale price $3,799.00 Regular price$4,999.00
Save $1,200

Looking for the latest Full Suspension eBike from Biktrix? Check out the Juggernaut Ultra FS Pro 3!

Juggernaut Ultra FS Pro 3

Technical Specifications


6061 aluminum w/ 100mm rear travel

front hub

Quanta 150mm 36h

seat post

Aluminum 31.6mm


Biktrix inverted tapered w/100mm travel

front axle

15mm thru

seat post clamp

Quick release


Threadless 1-1/8 1-1/2 tapered

rear hub

Quanta 197mm 36h


1000w (1500w peak) bafang ultra mid-drive

shifter rear

Sram nx 11 speed

rear axle

12mm thru

battery sizes

48v17.5ah, 48v21ah, 52v17.5ah

rear derailleur

Sram nx 11 speed


26"- black w/ red cutouts 36h, 27.5"- black 36h


Dpc-18 color display


Sram pg-1130 11-42t

tire sizes

26x4", 27.5x3"


Integrated headlight, battery taillight


Kmc x11


Aluminum 34.9 clamp, 700mm wide, 20mm rise 8° backsweep 5° upsweep

assist type

Torque, cadence

crank set

170mm aluminum arms with 44t steel chainring


90mm aluminum

assist levels


bottom bracket

Bafang ultra isis


Slide on


Thumb throttle


Tektro hd-e500 w/ 180mm rotors


Velo plush narrow

brake levers

Tektro hydraulic w/ adjustable reach & motor cutoff

rear suspension

Rockshox monarch rt3 184x44

Size & Fittings

1 Effective Top Tube Length 620mm 24.4in
2 Seat Tube Length (Classic Bike Size) 420mm 16.5in
3 Reach 460mm 18.1in
4 Stack 580mm 22.8in
5 Chainstay Length 480mm 18.9in
6 Standover Height 730mm 28.7in
7 Head Angle 64° -
8 Seat Angle 73° -
9 Head Tube Length 150 mm 5.9 in
10 Fork Length 570mm 22.4in
11 Front Center 790mm 31.1in
12 BB (Bottom Bracket) Drop 30mm 1.2in
13 Fork Offset 30mm 1.2in
14 Wheelbase 1240mm 48.8in
15 Total Length 1940mm 76.4in
16 Max Seat Height 1060mm 41.7in
17 Min Seat Height 910mm 35.8in
18 Handlebar Height 1080mm 42.5in
19 Weight (Without Battery) 29kg 63.9lb
1 Effective Top Tube Length 620mm 24.4in
2 Seat Tube Length (Classic Bike Size) 410mm 16.1in
3 Reach 460mm 18.1in
4 Stack 580mm 22.8in
5 Chainstay Length 490mm 19.3in
6 Standover Height 790mm 31.1in
7 Head Angle 71° -
8 Seat Angle 75° -
9 Head Tube Length 150 mm 5.9 in
10 Fork Length 580mm 22.8in
11 Front Center 815mm 32.1in
12 BB (Bottom Bracket) Drop 80mm 3.1in
13 Fork Offset 30mm 1.2in
14 Wheelbase 1300mm 51.2in
15 Total Length 2020mm 79.5in
16 Max Seat Height 1120mm 44.1in
17 Min Seat Height 960mm 37.8in
18 Handlebar Height 1080mm 42.5in
19 Weight (Without Battery) 30.6kg 67.5lb

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Customer Reviews

Based on 249 reviews
B sting
Juggernaut ultra fs pro

I took my time, looking at, and tested so many EMTB’s. It was a very difficult decision. This machine is perfect for my needs. The ride off road is so smooth, and the ability to drop down in to some canyon with the power to pull you back out with absolutely no problem is amazing. Then there’s the distance, with the duo battery pack in sport mod you have miles. The 27.5x3+ tires on 2.5” wide rims are perfect for the weight and well needed, but they’re not to big for my weight 170lbs they’re perfect. I choose this bike because of its wheel base stance. And a few other things and it has absolutely exceeded my expectations. The whole process of ordering, delivery, and assembly was great. I have read the reviews on this product and I agree it is an amazing machine. It performs so well will pedaling. It invites you to pedal and pedal harder, but then there’s always that throttle for when you get tired and don’t want to pedal. Despite its weight with two batteries, 85lbs it is quite nimble, and with that weight you feel so planted and can climb out of anything. Can’t say enough about this product. Good work friendly people.

Donald Myers
Wait to ride it

The bike passed my inspection. Now I must wait to ride it. Having kidney stone removed on 12/21/23. It is in the living room now. Cannot wait to ride it in the mountains. Nice to look at while recovering from surgery. I know it will be a big step up from the Juggernaut Classic Duo I own. The motor and suspension will make the difference. Again CANNOT WAIT TO RIDE IT!!!! It will be like riding my dirt bike. Pleased with it. GOOD BUY. More review after I heal up and rlde it. Sold my Juggernaut Classic Duo Mid drive to my friend who moved up from a Hemingway hub drive. Ready to rip up the trails.

Juggernaut FS Pro 3

This is my first Ebike. I wasn't sure what to expect. This bicycle far exceeds my expectations.
Assembly is easy for 1 person. Fit and Finish and Quality is awesome.
I rode it for the first time around my driveway and yard without the battery power turned on. I was very impressed
with how easy it was to peddle, it felt like a regular mountain bike.
Next I took it on a 7 mile ride with the battery power, I toggled through all the pedal assist levels and used the throttle only.
I couldn't stop saying to myself WOW, this bike is a blast to ride.
When I purchased this bike I selected the Sulfur Yellow powder coating (beautiful powder coating job, I love the color) I also opted for the upgraded Tektro Quad Piston brakes (fantastic brakes, they work very well)
The Armageddon Headlight (very bright) The Wren Star Ratchet Rear Hub and the Rear rack and fender set.
I am still fine tuning the suspension, seat and handle bar placement to make it all perfect for me.
I'm looking forward to many fun miles of riding, Thank You Biktrix.

earl vandenberg

Very impressed with the bike and the service has been excellent.

Kevin Knodel
Sent out replacement hardware

Very happy with final resolution

Christoph Gschossmann
Juggernaut fs pro 3

I love the bike lots of power and it’s a lot of fun riding

Douglas Gedak
Simply Astonishing

Super happy with the quality of my new bike. I took to the steepest city path hill, I was astonished at the true strength and ease the climb was. My previous e-bike could not make it.

Chris Robertson
Frank the Tank

Bike is really nice! A bit heavy. Could use a bit more speed! Nice Bike

Rudolf Würfl
Great bike

Till now i only drove on asphalt roads, this was really great.
The following weeks i will Test it on gravel and Im sure that the bike is also great there.