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The Duo Series. Ebikes for Everyone.

The Juggernaut Duo Series is all about flexibility. Hub-drive or mid-drive, step-over or step-thru, single battery or dual battery, entry-level or high-end. No matter your needs, there's probably a Duo for you.

Watch this video to see how The 3 Duo models stack up.

welcome to the big leagues.

The Ultra Duo sits at the top of the Duo range, so naturally, it boasts one of the most powerful motor systems available today. The Bafang Ultra M620 mid-drive motor is loaded with 1500W of peak power and 160Nm of torque. Pair that with the 11-speed drivetrain and you'll be nearly unstoppable.


Mid-Drive Motor

The Bafang Ultra M620 mid-drive motor features 1000 watts of power and 160Nm of torque. Span cities, climb hills, and explore all the places you want to go with ease.

LCD Display

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

Thumb Throttle & Control Pad

With just a push of the thumb, you can access all of the power the motor has to offer. No need to pedal, just sit back and enjoy the ride.

Suspension Fork

The RST Renegade coil spring fork provides 100mm of travel with pre-load and lockout adjustability


From climbing hills to holding maximum speed on the flats, the SRAM NX 11-speed drivetrain has you covered.

Hydraulic Disk Brakes

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

Integrated Front Light

This bright LED light is powered by the bike's battery and can be turned on/off with a button on the handlebar control pad.

Optional Range Extender

Multiple range-extender battery options can expand your eBike's range all the way to 100 miles.

Rack & Fenders

These fenders will keep you and your bike clean. Need to carry some gear? Strap on the rear rack and make your way!

Technical Specifications

Size & Fittings

16" Step-Thru 17" Step-Over 18" Step-Thru 19" Step-Over

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Customer Reviews

Based on 39 reviews
Richard Dickerson
Juggernaut Ultra Duo 3 Step-Over Review

For this review I will cover 3 things
The bike itself
The range extender
The pannier bags

The bike itself is great, although it's so heavy it feels like a tank.
I am a big guy and weigh approx 340lbs so I needed a bike that handles my weight. The Jugg Ultra duo 3 easily handles this. Once you are mounted it feels like a normal bike and handles well. I have to 4" fat tires, which are new to me, but make gravel roads a piece of cake. I do wish there was an option on the Biktrix shopping site that optionally includes something like tuff-liners to be added before the tubes are put in. Or maybe a tubeless option. As it is the tires are vunerable to flats.
Assisted peddling and a throttle are new to me, and boy it is awesome. You can feel the endorfins without being exhausted too. I like that. My biggest wish is for an option to have a bigger front crank. I find that when using the smallest gear and the high-end of my cadence the speed tops out about 20 mph. I would really like to go faster than 20 without having to peddle like crazy. I'm used to many gears from my other bikes. There isn't much I would change on the bike but this is definitely one of them.
I found I like a peddle assist of 3 being the most comfortable, spoiled already.
From my limited riding, I love the bike. It truly does open up the world to you.

The bike rack is a heavy thing, the bars seem thicker than another one I have on my recumbant, my old paniers (from a different bike) do not fit well due to the bar diameter. I did spend $100 on the offered panniers. I am sorry I bought them. The mounting depends on straps only and that is a big disappointment. You need top hooks over the bars and a lower hook for the bottom to make them solidly mounted. Hand tightened straps are never solid and will work loose. I don't like that. If I was smart I would have looked for other alternatives.

More options I wish for:
A mirror would be great.
A cell phone holder would be nice...maybe not viable due to so many variations.

Canecreek Thudbuster seat post
I spent another $150 on short-travel seat post. I really, really regret that. That is because the seat attachment assembly is a poor design. It's insane for one person to reassemble if it ever comes apart. New bikes always involve at least 100 seat adjustments to get dialed in to max comfort. Between height, tilt, forward or back rail adjustments, it takes a while to get right. Unfortunately, the assembly is finicky and the whole thing (my entire weight) depends on the robustness of a single bolt that is not big enough for the job. Plus you have to torque the crap out of it to keep it from rotating, there are no friction guards (teeth) to keep that from happening. So when going down the road at 20 or so and with a little uneven terrain, bounces will almost certainly rotate the seat tilt out of position. You can readjust in the field, but not well so your ride is compromised. (you can't really get the torque you need from a portable multi-hex tool). The normal seat post (thankfully was shipped with the bike) has a much better design. A bigger bolt and small gear teeth that mesh together to prevent tilting. Easier to slide forward or backward on the seat rails so you can position as good as can be had. So the Thudbuster is a bust for me.

Range Extender
For me, the range extender is essential. With my weight I need the extra juice for range. I don't know what my max range is but it's a lot less than 100 miles. It is a variable depending how much I use the throttle and peddle assist level. I would hope for 50 miles but I'm pretty sure it's closer to 40. That being said, I have no regrets using the throttle or higher assist. It's just way too much fun.

With the exceptions mentioned above, I have no regrets purchasing this bike and plan to put a great many miles on it.

Jeff Hennessee
Great bike

Really enjoying my first e-bike, the Juggernaut Ultra Duo 3. Very well built bike. Only have 15 miles on it but looking forward to putting many more on it. No complaints at this point.

Rick S
Great Bike - Quality and Power More Than Expected

Bike assembly was straight forward. Good customer support on a few newby questions. Exceeded expectations. Would definitely recommend

Todd Brown
Judging the Juggernaut

This is my third e bike, it has the most power and battery capacity (910 Wh extender) of the three. It also has the highest load rating of the three which was a big factor in my purchase. So far it has been exactly what I expected. I have the fat tires and I have never been that comfortable on dirt and gravel, truly remarkable. This is a great bike at any price ( I chose it over a $9000 bike). I made the right call! I’ve ordered the narrower rims for asphalt riding but I’ll be putting on the fatties for off road.

randy gronlund

love my bike!!!!

Derek Rogers

Juggernaut Ultra Duo 3 Step-Over

Erica Yaskowich
Best Purchase

I had been thinking about an E-bike for awhile and looked at many different companies. Super glad I chose what I did. The Ultra Duo 3 with the range extender I purchased is perfect for me. It is nice having the ability after you have been pedalling hard to get the extra boost from the throttle when you need it. Hills are a breeze and a long ride is no problem. I have never been happier with my bike and would highly, highly recommend anyone who is interested in an e-bike to take the time and visit the showroom. I learned a lot and really saw what they had to offer. Again, best purchase I have made in a very long time and I can’t wait for more adventures to begin!

Kenton Kusch
Ultra Dou 3

The bike is awesome.Igive it a 4.5 The rims lwish were 80mm
Its power is great.l love it.

Peter LaGrandeur
All Great Except High Stepover Height

Yes, life is always a compromise. I bought the Juggernaut Ultra Duo 3 with the 17" frame, stepover, and 27.5" wheels. I'm "inseam challenged" and have a short inseam height, 28". It's a bit high for me to mount, but once I'm seated, it fits me well, and is a pleasure to ride.
Other than that, the bike is very sturdy and seems very well designed. It is powerful, has many great features, and it rides very smooth with excellent stability. Its performance has exceeded my expectations.
I got it for riding urban streets, country gravel roads, paved back roads, forestry roads, rail trails, and canal pathways.
It's a bit too big and fast for urban bike paths.
The frame seems very strong and well designed. Its mechanical componentry is industry standard and should be able to be serviced at any bike shop.
The electronic and electric componentry uses the Bafang system which is industry standard, and hopefully will have parts available for years to come.
I'm looking forward to a BikTrix shop opening in Calgary soon.
I definitely recommend this bike to anyone who wants an eBike, and will use it for the same things as me.
A possible option for us who are short in the inseam would be to offer the option to buy just a basic front fork with no suspension. This would drop the height of the top bar by a few inches, making it much easier to straddle the bike. Just a thought ...
Anyway, a great product for a great price, in comparison to the name brand competition.

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