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.


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.

Performance. Fully Loaded.

Mid-Drive Motor

The Bafang Ultra M620 mid-drive motor features1000 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 Guide fork provides 80mm of travel with pre-load, lockout, and rebound adjustability.


From climbing hills to holding maximum speed on the flats, the Shimano 9-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 & Rear Light

The ultra bright front & rear LED lights are 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. (160km on .CA site)

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

17" Step-Over Medium 19" Step-Over Large 21" Step-Over Extra-Large

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Customer Reviews

Based on 9 reviews
Gwen Laverdiere
Juggernaut Ultra Duo 2 Step-Thru

Thanks to our Kelowna rep Larry and his quick thinking we were able to bring our bikes to Nuevo Vallarta. Their quality can withstand those always present Mexico roads and sidewalks. It has been as smooth as possible and they seem to be holding strong. Can't wait to give updates.

Richard Drouillard
Step through 1000watt ultra

So far extremely impressed with 1)shipped in a double line box. 2) tons of torque and top end speed .3) love the double sided peddle sprocket 4) love the extra comfortable handle bar grips. One small critique, move the kick stand more closer to the rear so that when your backing the bike up with the kick stand extended the peddle won't get it jammed on the peddle. There are times when you need to back the bike up but you don't want to take the kick stand off. My old ebike does not have this problem. Not that big of a deal. Just saying. Overall so far 10 out of 10 kudos to biktrix

Gord Guy

I'm not impressed,there no manual with this bike.
I don't the computer much,so I feel I have been left high and dry.
Spent 4,600 on this bike and no paper manual

Jeff Cullison
Juggernaut duo

Just received shipment before Christmas. Followed online assembly instructions with no problems. However have not been able to find online operating instructions to explain different pedal assists and how they work, how to change km-miles, and other possible functions of the information screen. Won’t be able to call and speak to someone until after the third of January due to holiday closure.

MaryLou Boggess
Fell in Love Again

OMG I love this bike. I have the biggest grin on my face when I ride. I equipped it with a bike more lights. They get a lot of attention and at 55 years old I am having the time of my life. Will be taking it to Canton Avenue which is the steepest hill in Pittsburgh. So best purchase ever.

Michael Hubbert

Juggernaut Ultra Duo 2 Step-Thru

Ian Kalina
Frustrating start

My bike was shipped on March 4th and took a week to arrive. There were several delays in shipping. Stuff like that happens. But when my bike arrived on Friday March 11th and I returned from work to assemble it, Biktrix was closed. I quickly discovered that there was no assembly manual that the videos tell you is included. I have some mechanical aptitude so was able to assemble the bike with relative ease. Until I had to attach the front fender and armageddon headlight. I tried every way possible to try and attach the fender. It was impossible. The fender stays would not reach the fork. I emailed my concerns hoping I would hear from Biktrix support on Monday. They emailed me back and asked me to send photos of the problem, which I did. They sent me pics of where the holes and stays were to attach. It was not helpful and my frustration continued as I kept wondering why this was such a persistent issue. Eventually someone from customer support told me to go to my local bike store to get a replacement fender and pre-authorized funds for me to do so. While appreciated what sounded like a fix, they didn’t have 4in fenders in stock.

It was only when they looked at my bike did they see the problem. The fender on my bike was installed backwards at Biktrix. This immediately explained why my fender stays wouldn’t reach and attach. Once the fork was turned around, the fender stays attached perfectly. I have only ridden my bike home and loved it. I am looking forward to riding my juggernaut, but it has taken over 2 weeks. I hope Biktrix Support can learn from my experience and I have many problem free rides ahead of me.

Murray Popplewell

Juggernaut Ultra Duo 2 Step-Thru

Tom Mauro
I’m still waiting for the way kickstand to be replaced and my bike with scratched when I got it a...

I’m still waiting for my kickstand that was broken to be replaced and also my bike with scratched in a few places and it was supposed to be brand new and they just use touch up paint