Juggernaut Ultra FS Pro

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

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.

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!

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.

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. 👍

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.

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.

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.

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

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!

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.

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!

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! 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 .

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