Diamondback Union 2
The Diamondback Union 2 is an electric bike with a Powertube 500Wh pack, a stated range of 35-65 miles, assistance to 28 mph km/h and a 27.5-inch wheel.
Last updated: 1 November 2026
Motor and performance
- Assisted speed
- 28 mph
- Motor type
- Bosch Performance Line Speed
- Claimed range
- 35-65 miles
- Vehicle class
- Class 3
“This e-Bike offers powerful acceleration and support up to 28 mph”
Source: diamondback.com/products/union-2
“Bosch Performance Line Speed”
Source: diamondback.com/products/union-2
“an estimated range of 35-65 miles”
Source: diamondback.com/products/union-2
“The Class 3 Union 2 electric bike is fully loaded to get things done.”
Source: diamondback.com/products/union-2
Battery and charging
- Energy
- 500Wh
- Battery
- Powertube 500Wh
- Pack shipped with
- powered by a Bosch Performance Line Speed motor and a Powertube 500Wh battery
“powered by a Bosch Performance Line Speed motor and a Powertube 500Wh battery”
Source: diamondback.com/products/union-2
“powered by a Bosch Performance Line Speed motor and a Powertube 500Wh battery”
Source: diamondback.com/products/union-2
“powered by a Bosch Performance Line Speed motor and a Powertube 500Wh battery”
Source: diamondback.com/products/union-2
Brakes and safety
- Brakes
- Tektro hydraulic disc brakes
- Brake levers
- TEKTRO HD-M735, 2 Finger Lever
“A 10-speed Shimano drivetrain fine-tunes your pedaling, while Tektro hydraulic disc brakes keep your speed under control.”
Source: diamondback.com/products/union-2
“TEKTRO HD-M735, 2 Finger Lever”
Source: diamondback.com/products/union-2
Frame and components
- Fork
- Formed 6061 T6 w/ Integrated Crown, Disc Brake, Thru Axle
- Cassette
- Shimano, 11-32 tooth, 10 Speed
- Frame
- Formed 6061 T6 Oversize Aluminum Alloy Thru Axle Dropout, Disc Brake Specific, Powertube Integrated Battery
- Tires
- 27.5" x 2.4" Schwalbe Super Moto
- Rims
- Aluminum 27.5", Black Anodized, 25mm ID, Disc Specific, 32 Hole
- Chain
- KMC x10e EPT, Ebike Specific
- Gearing
- 10-speed Shimano drivetrain
- Shifter
- Shimano Deore SL-M6000, 10 Speed
- Cranks
- FSA Forged Aluminum for Bosch System
- Pedals
- Shoe Friendly Urban Design, Resin Body
- Headset
- Integrated, Sealed Bearing
- Handlebar
- Aluminum Alloy
- Seat post
- Aluminum Alloy Forged Head, 350mm
- Display
- Bosch Kiox on-board computer
- Wheel size
- 27.5-inch
“Formed 6061 T6 w/ Integrated Crown, Disc Brake, Thru Axle”
Source: diamondback.com/products/union-2
“Shimano, 11-32 tooth, 10 Speed”
Source: diamondback.com/products/union-2
“Formed 6061 T6 Oversize Aluminum Alloy Thru Axle Dropout, Disc Brake Specific, Powertube Integrated Battery”
Source: diamondback.com/products/union-2
“27.5" x 2.4" Schwalbe Super Moto”
Source: diamondback.com/products/union-2
“Aluminum 27.5", Black Anodized, 25mm ID, Disc Specific, 32 Hole”
Source: diamondback.com/products/union-2
“KMC x10e EPT, Ebike Specific”
Source: diamondback.com/products/union-2
“A 10-speed Shimano drivetrain fine-tunes your pedaling, while Tektro hydraulic disc brakes keep your speed under control.”
Source: diamondback.com/products/union-2
“Shimano Deore SL-M6000, 10 Speed”
Source: diamondback.com/products/union-2
“FSA Forged Aluminum for Bosch System”
Source: diamondback.com/products/union-2
“Shoe Friendly Urban Design, Resin Body”
Source: diamondback.com/products/union-2
“Integrated, Sealed Bearing”
Source: diamondback.com/products/union-2
Row from the maker’s page: “HANDLEBAR” | “Aluminum Alloy”
Source: diamondback.com/products/union-2
“Aluminum Alloy Forged Head, 350mm”
Source: diamondback.com/products/union-2
“The Bosch Kiox on-board computer provides ride data at your fingertips via a handlebar remote and easy-to-read color display.”
Source: diamondback.com/products/union-2
“Wide tires on 27.5-inch wheels take the sting out of rough pavement.”
Source: diamondback.com/products/union-2
Sources
- Union 2 | DiamondbackArchived document
Source: diamondback.com/products/union-2
Retrieved October 12, 2026