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 air 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 38 reviews
Orlando Thompson
Juggernaut Ultra Duo 3 Step-Thru

Exceeding every expectations thus far

Ralph Steiert

So far, so great!! Love the Bike, love the Power, hate the bell.

Frank V Africh
Love my Juggernaut Ultra Duo 3

The bike looks great, powerful Mid hub drive,

Patrick Zalatan
For the kid in you

Having fun with the duo ultra !! Great bike !!

Les Myllymaki
Juggernaut Ultra Due 3 Step-Thru

Allready 121 km,Excellent buy, great for exercizing , used the throttle for assisted hill climbs ,72 years old , enjoy very much… Display is excellent.. Les M

Biktrix Are Awesome!

We definitely made the right decision after extensive research. There are similar bikes on the market but be wary as some are pretty sketchy operations. Biktrix bikes are high quality - you pay for what you get. Customer service has been great and have gone out of their way to answer general questions and help with a billing issue created by PayPal. Just a warning - if you are located in Canada, when purchasing through PayPal make sure your VPN and obfuscation software is off!

Wanda Sexton
Loving my ride

Loving my bike. Never thought I'd like fat tires but yes I do. Enjoyable riding, comfortable and so fun!

Victor Ring

Would be nice if every bike came with a printed manual. Cannot locate online.

Elson Zazulak
For Me the Bike is Great

I bought this bike because my knees are in pain and I need the exercise to strengthen the leg muscles as I need surgery. I find it painful to walk and stand for any time on my legs. I have an old 5speed bike and I was having a difficult time pedalling up small inclines and had to sometimes push my bike up these small inclines and up all the steep hills. With THis Ebike the pedal assist is amazing and I have had no problems at all pedalling. I also have used the throttle and was amazed at the power and speed that you can get out of this bike.