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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 41 reviews
Linda Smith
Gray Hair Lady and a Juggernaut

More fun than I have had in a very long time. I am not a very adventurous person but a good friend convinced me to get one. LOVE IT. Every time I venture out I get braver. Highly recommend.

Raymond Schiller
Duo 3 Step Thru

Love it

Laura Robinson
Love this bike!!!

I absolutely love this bike! I’m back on the trails after being crippled for 7 years. I feel like my old self! The staff is very helpful too! The coral pink is beautiful. I can’t say enough good things about biktrix!

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!

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