Diamondback Union 1 E-Bike (Onyx Matte)

Price: $2,999.00
Discontinued Online
This item is discontinued and no longer available for purchase. You may want to search our site for a similar item.
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Large lithium batteries are subject to HazMat fees

The evolution of E-bikes over the past couple years has seen dramatic changes with a huge uprising in performance and quality. Diamondback created the Union 1 Class 3 E-bike as the perfect alternative for commuting around the city. With a range up to 55 miles, pedal assist up to 28mph, and a display/control unit up front, the Union 1 will work its way into your life and have you embracing the joy that riding a bike can bring. Electrify your commute, electrify your life.


  • Class 3 E-bike capable of providing pedal assist up to 28mph
  • Bosch Performance Line Speed motor paired w/ a 400Wh downtube battery
  • Bosch Purion on-board computer provides all the data you need in a convenient location
  • Aluminum frame construction w/ internal cable routing
  • 10-Speed Shimano drivetrain with wide range optimized to fine tune riders pedaling
  • Tektro hydraulic disc brakes keep speed under control
  • Integrated rack & fender mounts gives riders the option to carry additional accessories
  • Estimated range of 35-55 miles (56-89km)
Frame: Formed 6061 Aluminum Alloy
Motor: Bosch Performance Line Speed (28mph)
Battery: Bosch PowerTube 400
Display: Bosch Purion
Charger: Bosch 4A 
Rear Shock: - 
Fork: Formed 6061 Alloy w/ Integrated Crown
Headset: Integrated (Sealed)
Handlebar: Aluminum Alloy 3D Forged
Stem: Aluminum Alloy (31.8mm) 
Brake Levers: Tektro M735 (2-Finger)
Brakes: Tektro M735 (180/160mm)  
Shifter: Shimano Deore SL M6000 (10sp)
Front Derailleur: -
Rear Derailleur: Shimano Deore M610 (10sp)
Crank: FSA Forged Aluminum (42T)
BB: Steel Cartridge
Cassette: Shimano (11-32T) (10sp)
Chain: KMC X10e
Pedals: Platform
Seat: Custom Ergo Performance
Seatpost: Aluminum Forged (350mm)
Rims: Aluminum Disc Specific (25mm I.D.) (32H)
Front Hub: Formula (TA) (Disc)
Rear Hub: Formula (TA) (Disc)
Spokes: Steel Spokes
Tires: Schwalbe Super Moto (27.5" x 2.4")  

*Note: These bikes are fully built by our expert bike builders, then partially disassembled as needed for shipping. Bikes will arrive to you with some basic assembly still required. 

This product was added to our catalog on October 4, 2021