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Juggernaut Ultra Duo 4 Step-Thru

Sale price$2,999.00 USD
Estimated to be shipped in 6-7 business days
Emerald Green

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 9-speed drivetrain and you'll be nearly unstoppable.

Ultra Power. Greater Features.

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 information about your ride including speed, battery life, range, odometer, pedal assist level and more.

Thumb Throttle & Control Pad

With just a push of a thumb, you can access all of the power the motor has to offer.

Suspension Fork

The RST Guide spring suspension fork provides 75mm of travel with pre-load and lockout adjustability.


From climbing hills top holding maximum speed on flats, the Shimano Alivio 9 Speed drivetrain has you covered.

Hydraulic Disc 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 and off with a button on the handlebar control pad.

Optional Range Extender Battery

Multiple range-extender battery options can expand your eBike’s range all the way to 160 kilometres.

Rack & Fenders

These fenders will keep you and your bike clean. Need to carry some gear? Strap it onto the rear rack and head out!

Technical Specifications

Size & Fittings

1 Effective Top Tube Length 560mm 22in
2 Seat Tube Length (Classic Bike Size) 420mm 16.5in
3 Reach 520mm 20.5in
4 Stack 500mm 19.7in
5 Chainstay Length 480mm 18.9in
6 Standover Height 430mm 16.9in
7 Head Angle 68° -
8 Seat Angle 71° -
9 Head Tube Length 180 mm 7.1 in
10 Fork Length 530mm 20.9in
11 Front Center 710mm 28in
12 BB (Bottom Bracket) Drop 40mm 1.6in
13 Fork Offset 30mm 1.2in
14 Wheelbase 1240mm 48.8in
15 Total Length 2000mm 78.7in
16 Max Seat Height 1000mm 39.4in
17 Min Seat Height 830mm 32.7in
18 Handlebar Height 1100mm 43.3in
19 Weight (Without Battery) 33.5kg 73.9lb
1 Effective Top Tube Length 560mm 22in
2 Seat Tube Length (Classic Bike Size) 460mm 18.1in
3 Reach 560mm 22in
4 Stack 520mm 20.5in
5 Chainstay Length 520mm 20.5in
6 Standover Height 450mm 17.7in
7 Head Angle 68° -
8 Seat Angle 71° -
9 Head Tube Length 180 mm 7.1 in
10 Fork Length 530mm 20.9in
11 Front Center 730mm 28.7in
12 BB (Bottom Bracket) Drop 50mm 2in
13 Fork Offset 30mm 1.2in
14 Wheelbase 1240mm 48.8in
15 Total Length 2000mm 78.7in
16 Max Seat Height 1000mm 39.4in
17 Min Seat Height 880mm 34.6in
18 Handlebar Height 1160mm 45.7in
19 Weight (Without Battery) 34kg 75lb

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Customer Reviews

Based on 102 reviews
James Bean
Great product

First time ebike rider and at 60 years old I feel like a kid again ..I get out and do 30 k a day like a breeze and the pedal assist has helped with back issues ..so win win 🏆 keep the great support 👍 thanks again

Keith Chapman
They are very helpful in fixing problems

I received the bike , in the first week I had problems , but Clayton called me and is going out of his way to be helpful and provide GOOD ! Customer service . He’s been helpful and made a bad situation ALOT better . I would highly recommend Biktrix customer service and help they provide . Even though I did have trouble they stepped right up to the plate with good customer service

Daniel Ives

Having problems with disc front brakes. Very difficult for me to do everything by email. Would love a direct phone number to talk to someone.
My number is

Tim Wright
Ultra 3

Fantastic bike. Easy assembly BUT check your tire pressure! I forgot to do that at the end of assembly and was wondering why on a 30km ride I was using 25% if my dual batteries. Well there was only 5 psi in the tires. Lol. Since filling them to 18 psi the same ride now uses 4%. It’s a fun exciting ride and I’m 69.

Marc LeCavalier

Love the bike

Geoff Dickin
Juggernaut Ultra Duo 3 Step-Thru

After 2 weeks of ownership all is good.
I have been travelling and only have 40km on the bike. Assembly was straight forward using your video for guidance.
The bike works very well, I've had it on asphalt, gravel, and a few trails.
The bike is stable and sure footed. Anyone that has seen it is impressed with the workmanship and quality of the build. I'm very pleased with the ease of shifting gears.
For myself 6'3", 200 plus pounds and 75 years of age this step thru Juggernaut was the right choice.
Thanks Biktrix .


After what I would call an unhappy wait for the delivery, we got our bikes
Hub Duo for her
Ultra Duo 3 for me
We must say we are very pleased with the bikes, the service the day we picked them up and the apology for the long wait.
Ryan at the Saskatoon store was exceptionally good as a man to deal with

Long wait

We bought two bikes. Hub duo and the Ultra dual 3
We were told it would be a few
Days to get them in, only because of the colour choice one one of the bikes.
It’s been three weeks and the excuse is we have 200 bikes come in to get ready, this is our busy season. If you bought in December we could have it sooner

I asked if they could try to have it ready for Saturday when we are in town, the answer. NO. We are closed this Saturday for the long weekend.

Well………. I have owned a couple or three businesses, when it was our “busy season” we worked overtime and 7 days a week to catch up and ensure we had happy customers
Has anyone any work ethics anymore ?????
Very unhappy customer!!!

George Parkson
Awesome ebike

The Ultra 1000 is a real cruiser…takes the hills with no sweat and the 24x4 inch fat tires are very comfortable reducing many bumps. I also have the extender which still allows room to step thru. I have the smallest extender. The mid drive with torque-cadence is a perfect match. If one can afford the Ultra 1000 go for it, however I think the hub 750 would also be a great second choice. Delivery was only one week. Biktrix support were very helpful on sale and customer tech support have answered all my questions after purchase. Glad I choose Biktrix.thank-you!

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