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Diamondback Union 1

Diamondback Union 1
  • Color: Onyx Matte
Color: Onyx Matte
Size: Select size
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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 Store SKU
Onyx Matte / Medium 791964595762 02-790-7021 210000076876
Onyx Matte / Small 791964601753 02-790-7020
Onyx Matte / Large 791964595779 02-790-7022 210000076875
Onyx Matte / X-Large 791964595786 02-790-7023 210000076877