Juggernaut Ultra FS Pro 3 MTB

Sale price $3,999 USD Regular price $4,699 USD
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**Larger frames will have a higher bar connecting the top-tube and seat tube
Brushed Aluminum
Packages
Battery
Range Extender Battery
 

This option adds an extra battery that mounts on top of the frame providing up to double the range of the stock battery.

Upgrades
Fork
 

Elevate your ride's comfort and control by upgrading your ebike fork, ensuring a smoother journey over any terrain.

**Upgraded front forks are incompatible with front fender included in Rack and Fender Set
Brakes
 

Enhance your safety and control on every ride by upgrading your eBike brakes.

***Tektro and Magura upgrades come with a brake rotor upgrade from 160mm to 203mm
Rear Hub
 

Upgrade your eBike's rear hub for a smoother, more efficient ride, unlocking enhanced performance and reliability with every pedal.

Dropper Seatpost
 

Elevate your ride with a dropper seatpost for seamless adjustments and ultimate control on any terrain.

***Adding a dropper seatpost to your eBike will increase the minimum seatpost height by approximately 75mm/3"
Headlights
 

Illuminate your path to adventure with an upgraded eBike headlight, delivering superior visibility and style for night-time riding.

Biktrix A-Bars
 

The swept-back design of the Biktrix A Bars provides an upright riding position with multiple comfortable hand positions so you can enjoy further and more frequent rides!

Motor Power
 

Program your motor to meet local eBike regulations or opt for unlimited speed and power suitable for off-road use only.

Rear Rack And Fender
 

This rear cargo rack with a solid, integrated fender will keep you nice and dry while riding, allowing you to carry all the cargo you may want on the rear end of your bike!

Puncture Resistant Tire Liner Puncture Resistant Tire Liner
 

Enhance your ride with a tire liner—designed to add an extra layer of puncture resistance and help reduce the chances of flat tires, so you can enjoy more worry-free miles!

Accessories
Coloured Pedals
 

Add some extra flair to your eBike with a set of coloured pedals!

Warranty

Secure your investment by opting for an extended warranty through the BiktrixCare+ plan.

Sale price $3,999.00 Regular price $4,699.00
Shipping Time

Leaves within 6-7 Business Days

1000W Mid-Drive

Motor Power

52V 17Ah 910Wh

est. 45mi Range

+5'8"ft / 265lb

Max Load

Torque Sensor

Powerful Pedal Assist

25+ Point Quality

Control Checklist

85+

Miles Range

160Nm

Torque For Extreme Hills

52V 17Ah

Strong, Reliable Battery

Full Suspension. Full Performance.

Top-of-the-line components and the most powerful torque-sensing mid-drive motor in the industry makes the Juggernaut Ultra FS Pro 3 the best-built full-suspension electric bike on the market. Now available with an optional range extender battery to add on additional range! New to this version is a rear triangle wide enough to support 4.8" tires!

Maximum Traction

With a quality FS system, both wheels stay connected with the ground. That means better handling and higher speeds on tough terrain. This bike is built for the trail.

Ride Anywhere. Any time.

The 27.5x3 MTB+ Tires provide the best of both worlds with a large diameter and narrow contact patch allowing you to overcome obstacles with speed and agility.

Ultra Power. Greater Features.

Distance Range (Single Battery)

PAS 1
Pedal-Assist Lv.1
84km Up To
PAS 2
Pedal-Assist Lv.2
70km Up To
PAS 3
Pedal-Assist Lv.3
61km Up To
PAS 4
Pedal-Assist Lv.4
56km Up To
PAS 5
Pedal-Assist Lv.5
50km Up To
THRL
Throttle Only
35km Up To
**Please note that information regarding the expected range on a single stock battery charge on one of our e-bikes is an estimate, not a guarantee. There are many factors that contribute to the actual, real-world range for an e-bike battery such as the age of the battery, temperature, level of assist, speed, payload, and terrain. Depending on these various conditions, it is possible to get less than the expected minimum range or greater than the expected maximum range.

Technical Specifications

Frame
6061 aluminum - 145mm frame travel
Front hub
150mm thru 36h
Seat post
31.6mm aluminum
Fork
Biktrix inverted air fork w/140mm travel, lockout and preload
Front axle
15mm thru axle
Seat post clamp
Qr
Headset
Threadless 1-1/8 1-1/2 tapered
Rear hub
197mm thru 36h
Motor
Bafang ultra m620
Shifter rear
Sram nx 11 speed trigger shifter
Rear axle
12mm thru axle
Battery sizes
Total capacity of 52v 34.5ah 1794wh:
52v 17.5ah 910wh (internal battery) +
up to 52v 17ah 884wh (external range extender battery)
Rear derailleur
Sram nx 11 speed
Rims
Black 26" with round cutouts, solid black 27.5"
Display
Dpc-18
Cassette
Sram 11-42t
Tire sizes
Chaoyang 26x4", chaoyang 27.5x3", chaoyang 26x4.9"
Lights
Integrated headlight
Chain
Kmc e11s - 130 links
Handlebar
700mm wide w/25mm rise, 31.8mm clamp
Assist type
Torque + cadence
Crank set
44t chainring w/ 170mm arms
Stem
90mm solid
Assist levels
1-5
Bottom bracket
Bafang isis
Grips
Velo bolt on mtb grips
Throttle
Thumb throttle
Brakes
Biktrix dual piston hydraulic w/180mm rotors
Saddle
Velo plush
Other
2-bolt kickstand
Brake levers
Biktrix adjustable w/ integrated brake cutoff
Rear suspension
Rockshox monarch rl w/ 51mm travel, 190mm eye-to-eye
Frame
6061 aluminum - 145mm frame travel
Front hub
150mm thru 36h
Seat post
31.6mm aluminum
Fork
Biktrix inverted air fork w/140mm travel, lockout and preload
Front axle
15mm thru axle
Seat post clamp
Qr
Headset
Threadless 1-1/8 1-1/2 tapered
Rear hub
197mm thru 36h
Motor
Bafang ultra m620
Shifter rear
Sram nx 11 speed trigger shifter
Rear axle
12mm thru axle
Battery sizes
Total capacity of 52v 34.5ah 1794wh:
52v 17.5ah 910wh (internal battery) +
up to 52v 17ah 884wh (external range extender battery)
Rear derailleur
Sram nx 11 speed
Rims
Black 26" with round cutouts, solid black 27.5"
Display
Dpc-18
Cassette
Sram 11-42t
Tire sizes
Chaoyang 26x4", chaoyang 27.5x3", chaoyang 26x4.9"
Lights
Integrated headlight
Chain
Kmc e11s - 130 links
Handlebar
700mm wide w/25mm rise, 31.8mm clamp
Assist type
Torque + cadence
Crank set
44t chainring w/ 170mm arms
Stem
90mm solid
Assist levels
1-5
Bottom bracket
Bafang isis
Grips
Velo bolt on mtb grips
Throttle
Thumb throttle
Brakes
Biktrix dual piston hydraulic w/180mm rotors
Saddle
Velo plush
Other
2-bolt kickstand
Brake levers
Biktrix adjustable w/ integrated brake cutoff
Rear suspension
Rockshox monarch rl w/ 51mm travel, 190mm eye-to-eye
Frame
6061 aluminum - 145mm frame travel
Front hub
150mm thru 36h
Seat post
31.6mm aluminum
Fork
Biktrix inverted air fork w/140mm travel, lockout and preload
Front axle
15mm thru axle
Seat post clamp
Qr
Headset
Threadless 1-1/8 1-1/2 tapered
Rear hub
197mm thru 36h
Motor
Bafang ultra m620
Shifter rear
Sram nx 11 speed trigger shifter
Rear axle
12mm thru axle
Battery sizes
Total capacity of 52v 34.5ah 1794wh:
52v 17.5ah 910wh (internal battery) +
up to 52v 17ah 884wh (external range extender battery)
Rear derailleur
Sram nx 11 speed
Rims
Black 26" with round cutouts, solid black 27.5"
Display
Dpc-18
Cassette
Sram 11-42t
Tire sizes
Chaoyang 26x4", chaoyang 27.5x3", chaoyang 26x4.9"
Lights
Integrated headlight
Chain
Kmc e11s - 130 links
Handlebar
700mm wide w/25mm rise, 31.8mm clamp
Assist type
Torque + cadence
Crank set
44t chainring w/ 170mm arms
Stem
90mm solid
Assist levels
1-5
Bottom bracket
Bafang isis
Grips
Velo bolt on mtb grips
Throttle
Thumb throttle
Brakes
Biktrix dual piston hydraulic w/180mm rotors
Saddle
Velo plush
Other
2-bolt kickstand
Brake levers
Biktrix adjustable w/ integrated brake cutoff
Rear suspension
Rockshox monarch rl w/ 51mm travel, 190mm eye-to-eye

Size & Fittings

1
Effective Top Tube Length
580mm 22.8in
2
Seat Tube Length (Classic Bike Size)
430mm 16.9in
3
Reach
440mm 17.3in
4
Stack
540mm 21.3in
5
Chainstay Length
510mm 20.1in
6
Standover Height
730mm 28.7in
7
Head Angle
63° -
8
Seat Angle
72° -
9
Head Tube Length
160 mm 6.3 in
10
Fork Length
540mm 21.3in
11
Front Center
810mm 31.9in
12
BB (Bottom Bracket) Drop
40mm 1.6in
13
Fork Offset
40mm 1.6in
14
Wheelbase
1320mm 52in
15
Total Length
2030mm 79.9in
16
Max Seat Height
1040mm 40.9in
17
Min Seat Height
840mm 33.1in
18
Handlebar Height
1020mm 40.2in
19
Weight (Without Battery)
32.6kg 71.9lb
1
Effective Top Tube Length
600mm 23.6in
2
Seat Tube Length (Classic Bike Size)
480mm 18.9in
3
Reach
460mm 18.1in
4
Stack
590mm 23.2in
5
Chainstay Length
510mm 20.1in
6
Standover Height
740mm 29.1in
7
Head Angle
63° -
8
Seat Angle
72° -
9
Head Tube Length
160 mm 6.3 in
10
Fork Length
540mm 21.3in
11
Front Center
810mm 31.9in
12
BB (Bottom Bracket) Drop
40mm 1.6in
13
Fork Offset
40mm 1.6in
14
Wheelbase
1330mm 52.4in
15
Total Length
2040mm 80.3in
16
Max Seat Height
1080mm 42.5in
17
Min Seat Height
880mm 34.6in
18
Handlebar Height
1060mm 41.7in
19
Weight (Without Battery)
32.6kg 71.9lb
1
Effective Top Tube Length
600mm 23.6in
2
Seat Tube Length (Classic Bike Size)
520mm 20.5in
3
Reach
460mm 18.1in
4
Stack
590mm 23.2in
5
Chainstay Length
520mm 20.5in
6
Standover Height
770mm 30.3in
7
Head Angle
63° -
8
Seat Angle
72° -
9
Head Tube Length
160 mm 6.3 in
10
Fork Length
540mm 21.3in
11
Front Center
810mm 31.9in
12
BB (Bottom Bracket) Drop
40mm 1.6in
13
Fork Offset
40mm 1.6in
14
Wheelbase
1340mm 52.8in
15
Total Length
2060mm 81.1in
16
Max Seat Height
1120mm 44.1in
17
Min Seat Height
940mm 37in
18
Handlebar Height
1060mm 41.7in
19
Weight (Without Battery)
33.6kg 74.1lb

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  • 5 stars: 232 (86%)
  • 4 stars: 18 (7%)
  • 3 stars: 8 (3%)
  • 2 stars: 4 (1%)
  • 1 star: 8 (3%)
Some of the reviews shown are from related products the merchant grouped with this one.
R
Ryan S.
How was the performance of the bike?:
Poor
Excellent
How comfortable was the bike?:
Uncomfortable
Very Comfortable
How was the bike build?:
Poor
Excellent
Juggernaut FS Pro 3

Bought 2 Juggernauts FS Pro 3's
Exceeded my expextations out of the box.
Honestly the best, fun, dialed bikes Ive ever rode, my wife is ecstatic, smiles for days, you really built a cool, fun, enjoyable e bike, more reviews to come as we ride and adventure

K
Kaeden
How was the performance of the bike?:
Poor
Excellent
How comfortable was the bike?:
Uncomfortable
Very Comfortable
How was the bike build?:
Poor
Excellent
Powerful, Rugged, and Backed by Great Support

This bike has far exceeded my expectations for an electric mountain bike. Yes, it is heavy, but it is so powerful that the weight honestly does not matter much once you are riding it. It feels rugged, capable, and strong enough to handle almost anything I throw at it.
I have ridden it through everything from -30°C winter conditions to mud, snow, sand, water, and rough terrain, and it has handled it all flawlessly without hiccups. The Ultra motor has an incredible amount of torque, and the bike feels like a tank in the best way possible.
That said, there are negatives with anything. The main weak point on this bike, in my opinion, is the rear hub. The stock Quanta pawl-style hub is not ideal for the torque of the Bafang Ultra motor. Mine suddenly grenaded and left me stranded, so I strongly recommend upgrading to a star ratchet rear hub if you ride hard or use the motor’s torque aggressively.
The second thing I would recommend is not really a Biktrix design issue, but more related to the Bafang Ultra motor itself. For maximum longevity, I believe many Ultra motors come under-greased from the factory. I regreased mine with Mobilgrease 28 aircraft grease at around 500 km, and I am very glad I did because mine appeared under-greased. I believe this maintenance can greatly improve the motor’s lifespan.
If you own this bike, I also recommend having a few proper tools: a torque wrench for correct torque specs, the Ultra motor chainring removal/installation tool, crank removal tools, and basic bike tools. I relube my chain about every 100 km, and I use medium-strength Loctite on most bolts where appropriate.
Overall, I am extremely happy with the bike. Between the performance, durability, power, and Biktrix support, I honestly believe this is one of the best e-bikes you can buy. Biktrix support has been a big part of why I am giving this bike 5 out of 5 stars. Compared to other e-bike companies on the market, I believe Biktrix stands out.

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T
Terry V.H.
How was the performance of the bike?:
Poor
Excellent
How comfortable was the bike?:
Uncomfortable
Very Comfortable
How was the bike build?:
Poor
Excellent
A Mtber review

As a long time mtber/racer my review is based on my experience..
I'm 56yrs old and have raced and rode mtb since 1991
I've had emtbs and regular fatbikes
To have a E fatbike is a next level in snow! So nice to have the assistance and flotation to get through softer trails.
The bike is heavy but not that noticeable , until you lift it into your vehicle.
Handling- good, I upgraded the headset to steepen the head angle Because it's kind of slack.
Suspension- better than I thought it would be.The front fork actually works well could, use thinner oil for the winter.
Brakes- i upgraded to 4 piston
Which took the brake safety wires off, also disconnected shift sensor (not cool when motor cuts out when shifting )
Up graded to dropper post
Changed the bars for something wider
The battery is 900wh but the range is comparable to maybe to 600wh, I get 35 to 50km offroad
I bought studded tires and have wider rims on order.
Most of these things are not a deal breaker , but just nice upgrades.
The company is very easy to contact and communicate with! For the price , I would definitely recommend this bike!

N
Nathan T.
How was the performance of the bike?:
Poor
Excellent
How comfortable was the bike?:
Uncomfortable
Very Comfortable
How was the bike build?:
Poor
Excellent
Amazing bike!

This bike is awesome! The whole thing seems to be made very well and with good quality parts. I bought this bike mainly for the power of the motor, because I am towing my special needs son in a trailer with a total weight of about 150lbs. This bike is amazing! I have gone on a few rides now and have gone up steep, long hills with no problem whatsoever! It's like riding on flat ground even on the biggest hills, and doesn't max out the power output. The battery seems to last a long time as well. After about a 30min ride on PAS 3 and going up about 8 decent sized hills while towing my son, the battery only dropped by 2%. The suspension feels like you're gliding on air, which I guess you sort of are seeing as the front and rear both use air-shocks...(You will need a special shock pump to adjust these...a standard bicycle pump can't achieve the high pressure needed)

I am 6' tall and bought a 19" frame which seems to be the right size. It's a bit confusing because the 19" frame says it's a Large frame on the website, but the frame says Medium when you actually get the bike. If you're unsure of what frame size to get I would suggest going with the bigger of whatever 2 options you are looking at, because the frames seem to fit a little bit small. (This is the opposite of what their website recommends, but I find that the seat has to be quite high for me and I can still put my feet comfortably on the ground)

There are only a couple of downsides that I can see so far but they are minor things. First, the motor is a little bit noisy, but that's to be expected from this amount of power output. The other thing is that there is no indicator on the shifter of which gear you're in, so you need to keep track of that yourself. Being a mid drive bike, make sure you are using your gears correctly and starting in an easy gear so that you don't put excessive strain on the motor.

I would highly recommend this bike!
Oh, and a shout out to Henry and Daniel...both of whom helped me out with the sale.

G
Graham C.
Awesome Ebike

This Full Suspension mid-drive MTB Ebike is incredible. Great ride with lots of torque to climb hills. The hydraulic breaks are solid. They can stop the bike quickly if needed. I have had the bike for a couple of weeks and I am thoroughly impressed. Great purchase. Their sales and customer service support is very good. 👍

s
steve b.
After a month now.

It's not easy to give a review with a brand-new bike with only just over 100 miles on it. Buying a new bike this time of year here in the NW of the United States we don't get to ride much being the weather sucks your soul more than you can ride. I find the quality and finish of the bike is very good. Very solid in every way. It's a bit slow in the first 2 PAS modes for my comfort. But understanding how much volts it uses, or let's say how much it doesn't use on the batteries is a plus. But a bit slow. If you put the bike in PAS 3 and above it does fine with keeping pace with others. I'm 5'8 tall. I got the smaller frame bike 17 I think is what it is. I have to raise the seat fairly high for my legs to be comfortable riding. So, it makes me feel like I'm kind of high over the bike. I'm sure over time that should calm down for me. I like the bright yellow color I choose for the frame. The black accent help with the overall look of the bike. The A bar was to flat for my liking. I gave it to a sibling to put on his bike. I bought the real Jones Bike H bar with a 2.5 lift. It feels a lot better on my shoulders. I'm getting use to the Wrem front forks and the Wren rear hub. I got help from Tej with programing my Ultra motor. I thank him very much for his help. The small change in programing I think will help the bike overall feel and keep me wanting to ride the bike more than the other 3 ebikes I own. I would like an invite to review the bike maybe this time next year. And see how many miles I get to put on it by then. Overall, I would recommend buying this bike if you want a large hunting frame bike that is very comfortable with full suspension and is powerful in higher PAS. But with city street manors. I went with the 26x4 inch fat tires. for riding in nearly all conditions. It will with ease.

N
Nicholas G.
The crank arms stripped out.

I like the bike. Would be awesome, but the crank arms threads stripped out where the pedals go. I had the bike for barely a weeks. Rode it three times for a total of 12 miles. Biktrix is working on a solution for me. I tried changing the arms myself, but my universal puller is not working on the arms.

J
Joey E.
Mediocre

Decent bike but some of the components are cheap and they don’t have replacements. Seem to be geared towards very light trail use and gravel paths. The motor is strong and the battery holds up decent. The customer service wasn’t my favorite to deal with. Slow responses and not the answers I was looking for. I ordered a boost bike but it came a fat setup making it not the best fit for me but they didn’t have the correct bike to replace it with and their solution was to send it back and buy a more expensive model. So I settled on a couple front end swap outs but ultimately isn’t what I really wanted and I have already considered selling it locally to buy a better branded e mtb.

J
Jeff S.
“I Found The Fountain Of Youth “ J.Schreck Mad History Adventures

We do Extreme Adventures in the Southwest United States and I have been looking at various machines for exploration . After deciding on an e-bike the next task was picking a manufactuer . Communication and rugged quality was a major concern in the process. My choice ended when I called Biktrix . The staff guided me thru the process and it was painless . I look forward taking you along with me as we go explore the great desert wilderness Let Ride ! J.Schreck

J
Jim R.
Awesome off-road machine

This is my second electric mountain bike. The first was a Rurui XT10 with hub drive and it was not well suited for off-road riding. This bike is! I like more serious off-road riding. I just completed my first 30 miles, mostly off-road. It included long, steep, loamy hills. My last ride was a 22 mile loop that has over 2,900 feet of ascent. Lower rider fatigue than other bikes as well. This off-road riding tends to eat batteries but I went about 30 miles on this charge and had 52% remaining without a range extender battery. Here is a YouTube video of parts of that 22 mile loop: https://youtu.be/NcHmBKLUrgU . I do recommend the Wren hub upgrade (details on why here: https://jimroal.blogspot.com/2023/06/biktrix-juggernaut-ultra-fs-3-350-mile.html ). I also have the range extender battery on this bike and I average around 75 miles of off-road assisted riding before needing a charge. Love this bike!

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M
Michael D.
Great bike!!

The bikers excellent to ride handles very well, but very heavy. It is very powerful and get you where you need to go or use her every day to go to work and back home.

A
Anthony B.
Excellent!

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!

J
Jeff D.
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.

G
G.C.
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 .

R
Roberto D.M.
Better than I expected,

The bike is all I was expecting and way more, The shipping and communication was spot on and very quick to reply to changes that I requested after the purchase. And I just had the best time ever riding trails whit my son in Colorado, no disappointments only great times … thanks