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Juggernaut Ultra Duo 4 ST

Sale price £2,515.00 Regular price£2,934.00Save £419
Emerald Green
Packages
Battery
Range Extender Battery
 

Add an additional battery to extend your bikes range and give you that boost!

**This option adds an extra battery that mounts on top of the frame that doubles the range of the stock battery.
Upgrades
Motor Power
 

Program your motor to meet local eBike regulations or opt for unlimited speed and power suitable for off-road use only.

Seatpost
 

Suspension seatposts offer great riding comfort as they absorb many of the imperfections on the road/trail.

***Adding a suspension seatpost to your eBike will increase the minimum seatpost height by 75mm/3" to 150mm/6"
Headlights
 
Fork
 

Elevate your ride's comfort and control by upgrading your ebike fork, ensuring a smoother journey over any terrain.

**The Upgraded Fork options are incompatible with the front fender included with the bike.
Brakes
 

Enhance your safety and control on every ride by upgrading your eBike brakes.

***Tektro and Magura upgrades come with a brake rotor upgrade from 160mm to 203mm
Drive Train
 

Unmatched power, smooth performance, and eco-friendly commuting in one seamless package.

**Drivetrain upgrade included Shifter, Cassette, Derailleur and Chain
Rear Hub
 

Upgrade your eBike's rear hub for a smoother, more efficient ride, unlocking enhanced performance and reliability with every pedal.

Biktrix A-Bars
 

The swept-back design provides an upright riding position with multiple comfortable hand positions so you can enjoy further and more frequent rides!

Accessories
Warranty

Secure your investment by opting for an extended warranty through the BiktrixCare+ plan.

Sale price £2,515.00 Regular price£2,934.00
Shipping: Leaves within 6-7 business days
1000W Mid-Drive

Motor Power

52V 17Ah 910Wh

est. 45mi Range

+5'6ft / 330lb

Max Load

Torque Sensor

Powerful Pedal Assist

On-Demand Throttle

Pedaling Optional

25+ Point Quality

Control Checklist

90+

Miles Range

160Nm

Torque For Extreme Hills

52V 17Ah

Strong, Reliable Battery

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.

Ultra Power. Greater Features.

Distance Range

PAS 1
Pedal-Assist Lv.1
84km
PAS 2
Pedal-Assist Lv.2
70km
PAS 3
Pedal-Assist Lv.3
61km
PAS 4
Pedal-Assist Lv.4
56km
PAS 5
Pedal-Assist Lv.5
50km
THRL
Throttle Only
35km
**Please note that information regarding the expected range on a single charge on one of our e-bikes is an estimate, not a guarantee. There are many factors that contribute to the actual, real-world range for an e-bike battery such as the age of the battery, temperature, level of assist, speed, payload, and terrain. Depending on these various conditions, it is possible to get less than the expected minimum range or greater than the expected maximum range.

Technical Specifications

Frame
6061 aluminum
Front hub
135mm 36h
Seat post
28.6mm
Fork
Rst guide w/75mm travel, lockout & preload
Front axle
5mm qr
Seat post clamp
Qr
Headset
Threadless 1-1/2" 1-1/8" tapered
Rear hub
190mm 36h
Motor
1000w bafang ultra m620
Shifter rear
Shimano alivio 9 speed trigger
Rear axle
5mm qr
Battery sizes
Total capacity of 52v 34ah 1794wh:
52v 17.5ah 910wh (internal battery) +
up to 52v 17ah 884wh (external range extender battery)
Rear derailleur
Shimano alivio 9 speed
Rims
26" black with round cutouts / 27.5" black solid
Display
Dpc-18
Cassette
9 speed 11-34t cassette
Tire sizes
26x4", 27.5x3"
Lights
Integrated headlight, integrated taillight
Chain
Kmc e9s 124 links
Handlebar
700mm wide, 50mm rise w/31.8mm clamp
Assist type
Torque + cadence
Crank set
44t chainring w/ 170mm arms
Stem
Adjustable stem
Assist levels
0-5
Bottom bracket
Bafang isis
Grips
Slide-on comfort grips
Throttle
Thumb throttle
Brakes
Iiipro e500 quad piston hydraulic w/180mm rotors
Saddle
Wide spring supported comfort saddle
Other
Front and rear fenders, kickstand, rear rack
Brake levers
Adjustable w/ integrated brake cutoffs
Frame
6061 aluminum
Front hub
135mm 36h
Seat post
28.6mm
Fork
Rst guide w/75mm travel, lockout & preload
Front axle
5mm qr
Seat post clamp
Qr
Headset
Threadless 1-1/2" 1-1/8" tapered
Rear hub
190mm 36h
Motor
1000w bafang ultra m620
Shifter rear
Shimano alivio 9 speed trigger
Rear axle
5mm qr
Battery sizes
Total capacity of 52v 34ah 1794wh:
52v 17.5ah 910wh (internal battery) +
up to 52v 17ah 884wh (external range extender battery)
Rear derailleur
Shimano alivio 9 speed
Rims
26" black with round cutouts / 27.5" black solid
Display
Dpc-18
Cassette
9 speed 11-34t cassette
Tire sizes
26x4", 27.5x3"
Lights
Integrated headlight, integrated taillight
Chain
Kmc e9s 124 links
Handlebar
700mm wide, 50mm rise w/31.8mm clamp
Assist type
Torque + cadence
Crank set
44t chainring w/ 170mm arms
Stem
Adjustable stem
Assist levels
0-5
Bottom bracket
Bafang isis
Grips
Slide-on comfort grips
Throttle
Thumb throttle
Brakes
Iiipro e500 quad piston hydraulic w/180mm rotors
Saddle
Wide spring supported comfort saddle
Other
Front and rear fenders, kickstand, rear rack
Brake levers
Adjustable w/ integrated brake cutoffs
Frame
6061 aluminum
Front hub
135mm 36h
Seat post
28.6mm
Fork
Rst guide w/75mm travel, lockout & preload
Front axle
5mm qr
Seat post clamp
Qr
Headset
Threadless 1-1/2" 1-1/8" tapered
Rear hub
190mm 36h
Motor
1000w bafang ultra m620
Shifter rear
Shimano alivio 9 speed trigger
Rear axle
5mm qr
Battery sizes
Total capacity of 52v 34ah 1794wh:
52v 17.5ah 910wh (internal battery) +
up to 52v 17ah 884wh (external range extender battery)
Rear derailleur
Shimano alivio 9 speed
Rims
26" black with round cutouts / 27.5" black solid
Display
Dpc-18
Cassette
9 speed 11-34t cassette
Tire sizes
26x4", 27.5x3"
Lights
Integrated headlight, integrated taillight
Chain
Kmc e9s 124 links
Handlebar
700mm wide, 50mm rise w/31.8mm clamp
Assist type
Torque + cadence
Crank set
44t chainring w/ 170mm arms
Stem
Adjustable stem
Assist levels
0-5
Bottom bracket
Bafang isis
Grips
Slide-on comfort grips
Throttle
Thumb throttle
Brakes
Iiipro e500 quad piston hydraulic w/180mm rotors
Saddle
Wide spring supported comfort saddle
Other
Front and rear fenders, kickstand, rear rack
Brake levers
Adjustable w/ integrated brake cutoffs

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 122 reviews
72%
(88)
11%
(14)
5%
(6)
5%
(6)
7%
(8)
R
Richard Stedman
This is a GREAT bike!

A smooth ride and exceptionally easy application of battery assistance. The power levels are fantastic and intuitively selectable. And it looks great too.

C
Cornelius Jouberts
Satisfied with purchase

I ordered a Juggernaut Ultra Duo for myself and a Juggernaut Classic Duo for my wife from Biktrix in Saskatoon. Their staff were very helpful and made my choices easy. Delivery was prompt and free and everything were received in good condition. Delivery was in May 2024 in Alberta, CA and since then we have unfortunately been prevented by bad weather to really try out our new bikes, but so far we are impressed and very satisfied

C
Customer
Enjoyable ride

Really enjoying my ride have only gotten bike in February. Riding only 5-10 km at a time. Shifts like a dream and all kinds of hill climbing power. Have the 4” tires they work well in snow and now it’s spring they handle well in soft ground. Disappointed in no Biktrix logo.

R
Ron Patrick
I did research on mid motor ebikes for months

After months of reading and watching every review on YouTube I decided on
The Juggernaut Ultra Duo 4. I was very fortunate to deal with Mark who was extremely helpful. This wasn't my first rodeo I have had 9 ebikes before getting the Juggernaut. And also having a mid motor ebikes. The process was very easy. Mark do to having to go to a show sent me to Clayton. Again Clay was very helpful and we placed the order. Now some where along the line wires got crossed and when I received the ebike , it was locked at the 20 mph . I'm not one to throw stones I contacted Mark and the programming cable is on it's way to program the Bafang M620. I went to BikTrix because I wanted a company that stands behind every ebike they sell.. And the selection these folks have is enough to keep every guys dreams. The ones with the most toys
comes to mind. These guys have every ebike for every person. I mean every
ebike. As you can tell I really enjoy ebikes , yet I also want the best my money
could buy. The quality of components are remarkable , they just don't cut corners. Don't get me wrong could I spend $10,000 on an ebike quite easily
I also would not have a home. ( My wife would kill me ) The money you will spend at BikTrix will get you the biggest bang for your buck.. Ok enough of what I think of BikTrix. Let's talk about the ebike. We ordered it on 2/13/24 took about 2.5 weeks. You see these folks assemble every ebike they sell. Say if you want a different front fork, you can get it or a bigger battery. Literally every bike you can add on's. So you are getting a custom ebike at not custom ebike prices. We decided on the Juggernaut Ultra Duo 4 now the only add on was the Armageddon head light. Now comes the really great stuff they air freighted the ebike to me, it came double boxed. ( I have 9 ebike s in a year ) only 2 came double boxed. The packing was superb and taking the bike
out box not a scratch. Assembly took us 1/2 an hour, the only down was we had to throw a charge on the battery and could not take the ebike on its maiden run. Now again the only problem was the Juggernaut to being uncorked to allow the ebike to hit 28 mph. And yes we bring our ebikes up to our quaint town hall and let folks get on the ebikes and see how much fun they are. And of course an old client of mine had an Lectric 3.0 and it went faster than the Juggernaut. No worries he will eat my dust very soon. The Juggernaut is just a pleasure to ride, the build quality is bar none terrific. Like I wrote quality of the components are excellent. I prefer a mid motor ebike and on a lot of mid motor ebikes there's always the question of getting off the gas so the motor does not tear up the chain or the cassette or worse the motor. There's a shift sensor so when you do shirt gears it backs of the motor for a second. Just another very nice feature. These guys think of everything. Am I a Happy Camper yes , will I be a really Happy Camper when I get the cable to program the M620 Bafang You Bet. Can I recommend BikTrix to you folks that's a big yes. Now one thing it's 2 days before the first day of spring. How do I know this it's the big 71 for me on the first day of spring. So if you order your ebike .Plan on waiting, and when they tell you it will take a few weeks or a month realize these folks assemble every ebike they sell.. And too all of you happy biking the worlds greatest addiction

E
Eldon Konschuh
Eager to setup and ride

Looking forward to a great spring of riding.
Will update you once I have the opportunity to take the bike out of the box.
EAGER TO RIDE.

C
Charles Reed

It’s sitting pretty
Waiting for spring

D
Desiree Stephens
Amazing Bike

Love the power. Excellent brakes. It handles sand and rough paths like a dream! And handles city cruising like a sports car. Super powerful! Perfect amount of gears and shifts so smoothly! I have no negatives about this bike

C
Customer
Why did I wait???

I have had the bike about a week and it is everything I wanted it to be! Took it out this weekend twice and was able to ride some big hills around my house that I would never have tried before now. My husband has an older Ultra and is jealous of mine. I’m glad I went with the step through frame, because even though I’m not used to that style, it is so much easier on my 5’3” frame. I was worried about the size because I’m so short, but with the step through it isn’t even a problem. My biggest regret is not getting one two years ago.

J
Jon Allen
Solid Quality

I own four other e-bikes, and sprung for the Juggernaut Ultra Duo 4. I finally can say that I am happy with an e-bike. The Juggernaut Ultra Duo 4 is the perfect bike for my area. I live in Southwestern PA where we have rolling hills everywhere, and most of the are steep and hard to climb even with an e-bike.

It arrived rather fast, it was packaged well and was easy to assemble. There is really no assembly. Just mount the front wheel and handlebars, that is it. Takes about 30-40 minutes including unpacking. I did a once over to ensure everything was tightened, pumped up the tires and plugged in the batteries. They needed several hours to fully charge. There was a small issue the front brake rotor (disc) that was quilckly replaced by Biktrix. It arrived today and it took about 20 minutes to replace. Now I am ready.

We had a sunny warm day today, so I took it out for a 12 mile break in ride on some seriously steep and long hills. I am 60 years old, 6ft tall, 250 lbs, and partially disabled. These e-bikes give me a certain freedom like no other activity. The Juggernaut Ultra Duo 4 is a serious powerhouse and allows me to navigate any roads or prepared paths that we have around here. I was going up hills with over 26% grade like nothing. And the Dual battery configuration will allow me to do that all day long. My other e-bikes would not make the hills leaving me to walk them partially, and after the same 12 mile ride, the batteries were 50% depleted. The Juggernaut Ultra Duo 4 used only 6% I was amazed that I still had 94% after the ride.

The Juggernaut Ultra Duo 4 is solid and very high quality. It shifts smooth, rides smooth, is very comfortable and it looks great. I had one customization by adding the A-Handlebars for a more swept back ride that allows me to sit fully upright when riding. This is a terrific e-bike that finally fulfills my needs and wishes. I love it and I highly recommend it.