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Diamondback Union 1

Diamondback Union 1
  • Color: Onyx Matte
Onyx Matte
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We do not ship this item, however it can be reserved online and picked up at your convenience in our store. You will be notified as soon as your order is ready for pickup.


Get it done.

The Class 3 Union 1 gets things done. Built on a sleek aluminum frame with internal cable routing, this e-bike is powered by a Bosch Performance Line Speed motor and a Powertube integrated 400Wh battery. The Bosch Purion on-board computer lets you focus on the important things with a minimalist design and with all the data you need at the touch of a button. A 10-speed Shimano drivetrain fine-tunes your pedaling, while Tektro hydraulic disc brakes keep your speed under control. Wide tires on 27.5-inch wheels take the sting out of rough pavement. With an integrated rack and fenders, the Union 1 lets you cut through city traffic with ease and confidence.

- 350W Bosch Performance Line Speed motor for powerful pedal assistance
- Bosch Powertube 400Wh battery provides up to a 55-mile range
- Tektro M735 hydraulic disc brakes for maximum stopping power in any conditions
- Shimano Deore 10-speed drivetrain offers smooth, reliable shifting

bike frame with labeled dimensions
Bike Sizes:
A. Reach 408mm 408mm 419mm
B. Stack 612mm 612mm 623mm
C. Standover 728mm 750mm 786mm
D. Effective Top Tube 595mm 595mm 610mm
E. Head Tube Angle 70° 70° 70.5°
F. Head Tube Length 160mm 160mm 170mm
G. Seat Tube Angle 73° 73° 73°
H. Seat Tube Length 380mm 430mm 480mm
I. Bottom Bracket Height 288mm 288mm 288mm
J. Bottom Bracket Drop 65mm 65mm 65mm
K. Fork Rake/Offset 50mm 50mm 50mm
M. Wheelbase 1125mm 1125mm 1135mm
O. Chainstay Length 470mm 470mm 470mm
Fork Length, Full 440mm 440mm 440mm
Sizing 5'4" -5'7" 5'7" - 5'10" 5'10" - 6'1"


Frame Formed 6061 T6 Oversize Aluminum Alloy, Thru Axle Dropout, Disc Brake Specific, Powertube Integrated Battery
Fork Formed 6061 T6 w/Integrated Crown, Disc Brake, Thru Axle
Rims Aluminum 27.5", Black Anodized, 25mm ID, Disc Specific, 32 Hole
Hubs Front: Formula, Sealed Bearing, Thru Axle
Rear: Formula, Sealed Bearing, Thru Axle
Spokes Black w/Silver Nipples
Tires 27.5 x 2.4" Schwalbe Super Moto
Crankset FSA Forged Aluminum for Bosch System
Chainrings FSA Forged Spider, 42 tooth w/chainguard, steel
Shifters Shimano Deore SL-M6000, 10 Speed
Rear Derailleur Shimano Deore M610, SGS
Chain KMC x10e EPT, Ebike Specific
Brakes Tektro M735, 4 Piston Front 180mm Rotor, 2 Piston Rear 160mm Rotor
Brake Levers Tektro M735, 2 Finger Lever
Handlebars Aluminum Alloy 3D Forged
Tape/Grips Ergo Comfort Control
Stem Aluminum Alloy 3D Forged
Headset Integrated, Sealed Bearing
Seatpost Aluminum Forged Head, 350mm
Saddle Custom Ergo Performance
Pedals Shoe Friendly Urban Design, Resin Body
Accessories & Extras Aluminum Structural Extrusion Fenders with Integrated Rear Rack, Rear Mounted Kickstand
Motor Bosch Performance Line Speed, 85Nm Torque, 28mph
Battery Bosch Powertube 400Wh
Charger Bosch 4A

* Subject to change without notice.

Part Numbers

Option UPC MPN
Onyx Matte / Large 791964595779 02-790-7022
Onyx Matte / X-Large 791964595786 02-790-7023