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Best Value
Diamondback
Union 2
- Year
- 2022
- Size
- XL: ideal for riders between 6ft 1in and 6ft 4in
Only one available
Why we love it
The Diamondback Union 2 is the perfect e-bike for commuting and getting around town. It's a comfortable and stylish bike with a powerful motor. It also has a variety of features that make it perfect for everyday use, such as a rear rack.
Top features
- High-performance, reliable, top of the line engine for powerful assistance on all types of terrain
- High-capacity battery for long range
- High-performance engine for powerful acceleration on the most demanding technical terrain
Specifications
General
Brand: Diamondback
Model: Union 2
Usage: City
Color: Blue
Year: 2022
Mileage: 45 mi
Weight: 53 lb
Frame type: Closed
Sizing
Manufacturer's size: XL (ideal for people between 6ft 1in and 6ft 4in)
Seat tube length: 52 cm
Stand-over height: 84 cm
Equipment & Accessories
Double kickstand: No
Rack position: Rear
Electrical
Battery
Condition: Original
Battery capacity: 500 Wh
Number of cycles of battery charge: 1
Battery location: Frame
Battery removable: Yes
UL certified: Yes. Available for purchase anywhere in the US.
Engine
Brand: Bosch
Model: Performance Line Speed
Engine location: Mid-drive
Engine torque: 85 Nm
Product Reference: BDU490P
Engine power: 350 W
Assistance type: Pedal
Max speed: 28 mph
e-Bike class: Class 3
Display
Display model: Kiox
Mechanical
Drivetrain & Braking
Shifting: Derailleur
Transmission: Chain
Derailleur model: Shimano Deore
Number of speeds: 10
Brakes: Disk | Hydraulic
Wheels & Tires
Wheels size: 27.5"
Tires: Schwalbe Super Moto-X (62-584 - 27.5 x 2.40)
Frame & Suspensions
Frame material: Aluminum
History and Inspection Report
All our bikes go through a 50-point inspection and are refurbished by professional mechanics. Learn more about the checklist
Diamondback Union 2 (2022)
Refurbished in our Los Angeles Upcenter in October 2026
- Frame, drivetrain, braking system, wheels, tires and suspensions inspected and tested
- Saddle and pedals were fixed or repaired
- 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 very good condition. There are some light scratches on the frame and other components.
Ownership history
This Diamondback Union 2 was sold to us directly from an individual in October 2026.
Warranty and Protection
Included with your bike
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.
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.