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Best Value
Biktrix
Juggernaut Ultra Duo 4 Step-Thru
- Year
- 2023
- Size
- L: ideal for riders between 5ft 4in and 6ft 3in
Only one available
Why we love it
The Biktrix Juggernaut Ultra Duo 4 Step-Thru is a powerful all-terrain e-bike built for riders who want to tackle steep climbs and rough trails with ease. Its low step-through frame makes it easy to hop on and off while the natural-feeling assist delivers a smooth and confident ride. Whether you’re commuting through the city or heading off the beaten path, this rugged and comfortable bike is ready for wherever the day takes you.
Top features
- High-capacity battery for extended range
- High-performance engine for powerful acceleration on the most demanding technical terrain
- Pedal motor provides smooth, proportional electric assistance
Specifications
General
Brand: Biktrix
Model: Juggernaut Ultra Duo 4 Step-Thru
Usage: City
Color: White
Year: 2023
Mileage: 935 mi
Weight: 79 lb
Frame type: Open
Sizing
Manufacturer's size: L (ideal for people between 5ft 4in and 6ft 3in)
Seat tube length: 46 cm
Equipment & Accessories
Double kickstand: No
Electrical
Battery
Condition: Original
Battery capacity: 910 Wh
Battery location: Frame
Battery removable: Yes
UL certified: No. Unavailable for purchase in New York City. Learn more.
Engine
Brand: Bafang
Model: M620
Engine location: Mid-drive
Engine torque: 160 Nm
Engine power: 1000 W
Assistance type: Pedal and Throttle
Max speed: 20 mph
e-Bike class: Class 2
Mechanical
Drivetrain & Braking
Shifting: Derailleur
Transmission: Chain
Derailleur model: Shimano Alivio
Number of speeds: 9
Brakes: Disk | Hydraulic
Wheels & Tires
Wheels size: 26"
Tires: Chao Yang (100-559)
Frame & Suspensions
Frame material: Aluminum
Dropper post: No
History and Inspection Report
Every e-Bike we sell undergoes our 50-point inspection process. Anything that doesn’t meet our standards is repaired or replaced by our mechanics. Learn more about the checklist
Biktrix Juggernaut Ultra Duo 4 Step-Thru (2023)
Refurbished in our Los Angeles Upcenter in October 2026
- Frame, drivetrain, braking system, wheels, tires and suspensions inspected and tested
- Battery, motor and display diagnosed and in healthy condition
- Software up-to-date
- Test ride, deep cleaning and final quality control check
Mechanic's note
This bike is in fair condition. There may be some external damage like scratches, abrasions or dents. The battery needs to be removed to be plugged in. The only charging port is on the battery itself, their is no functional one on the frame.
Ownership history
This Biktrix Juggernaut Ultra Duo 4 Step-Thru was sold to us directly from an individual in June 2026.
Warranty and Protection
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Optional coverage available at checkout
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Frequently asked questions
Yes you can contact us via our chat (from 9am to 6pm ET), via email at helpdesk@upway.shop or you can schedule a call with one of our Upway experts using this link.
A large percentage of our stock is actually brand new. In many cases, we get these bikes still-in-box from both manufacturers and bike shops as overstock. While you will typically not be eligible for manufacturer warranty for these bikes, this is how we are able to offer them at such a steep discount. You can find all our new bikes here.
Yes! A professional bike mechanic has repaired, inspected, and certified your electric bike, meaning we are happy to offer a 1-year warranty that covers mechanical and electrical defects. If you experience any problems within the next 12 months receipt of your bike, please contact us via email: helpdesk@upway.shop.
If you would like, you can purchase a more robust warranty through our partner, Extend. You can read more about Extend's warranty here.
No. Your sales taxes will be calculated at check-out and vary per state. At the same time, you may not see any sales taxes applied to your purchase. If you have any questions, don't hesitate to reach out to helpdesk@upway.shop or via our chat.
Yes! The pictures you are seeing on the product page are the pictures of the exact bike you will receive if you purchase it. At Upway we truly believe in transparency and trust, so we decided to take the time to have at least 7 pictures of each bike we have in stock so that you know exactly what you are buying. If you have any questions or if you want more pictures, don't hesitate to reach out at helpdesk@upway.shop or via our chat.
Yes! You will receive the key(s), charger(s), all the accessories you see on the pictures if there are some (rack, basket, bag, etc except the bike stand in the photo) and the user guide if we have it.Â
Upway lets you choose to receive your bike either in 15-minute assembly or 5-minute assembly options. You can also select additional preferences for delivery speed and appointment choice. Shipping starts at $99 but varies by model (some bikes aren’t eligible for the 15-minute assembly). You can find more info on this page.
Please be assured that Upway has your back in case of any shipping damage. We generally recommend that customers do not refuse shipments. Upway will then credit you back a fair amount for any aesthetic, permanent damages such as scratches, and cover any repairs for functional damage.Â