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Sorry, this Diamondback Union 2 Commuter E-Bike - 2021, X-Large has been sold.
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Diamondback Union 2 Commuter E-Bike - 2021, X-Large

Item #BRD33187
Condition: Certified Pre-Owned
Fit Range: 6'1" - 6'4"
Regular price

Trade In
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Every Certified Pre-Owned bike passes our multi-point inspection
  • Frame integrity verified
  • All components inspected
  • Drivetrain cleaned and tuned
  • Suspension adjusted
  • Wheels trued

Our RideFast shipping means this bike gets to you quickly and securely. Domestic US ground rates are a flat $135 for regular bikes or $150 for e-bikes.

Quick Assembly
  • Bikes arrive tuned and mostly pre-assembled
  • Torque tool & video guide included
  • Get riding in 15 minutes
Canadian Customers

Please note that any duties, taxes, or surcharges as required by Canadian customs and provincial authorities will be the buyer's responsibility. Shipping to Canadian addresses may take longer than expected due to customs.

Guaranteed Buyback

We'll happily purchase this bike back from you when you're ready for your next upgrade. A TPC buyback offer is guaranteed for 18 month on all qualifying bikes.

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30-Day Returns

If this bike isn't perfect for you, our Ride Guides will help you find the right one.

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Might Just Sell the Car...

Why We Love It
The Union is Diamondback's speedy city slicker. This Class 3 (pedal-assist up to 28mph) e-bike will light-up the city streets with the powerful Bosch Performance Line Speed motor and 400Wh battery that keeps the party going for miles and miles. 27.5" wheels provide a comfortable and smooth ride and disc brakes ensure you're confident cornering and stopping even if the weather turns. Speaking of wet weather, Diamondback has your back with front and rear fenders to keep you clean as well as head/tail lights that light up your path and keep you seen from vehicles on the road. Bring all your essentials along for the ride with the rear rack capable of carrying panniers or simply bungee your backpack to the top to minimize unfortunate back sweat.
Master Mechanic’s Notes
  • Light scratches on the fork, down tube, drive side seatstay, & chainstays
  • Light scratches on the seatpost, crank arms, & rear derailleur
  • Moderate scratches on the top tube
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Original MSRP $4,100.00
Year 2021
Brand Diamondback
Model Union 2
Size X-Large
Frame Material Aluminum
Drivetrain Shimano, 1x10 spd
Weight 52 lbs 11 oz
Fork Diamondback, Aluminum
Brakes Shimano MT420, Disc Brakes - Hydraulic
Shifters Shimano Deore SL-M6000, Mechanical
Rear Derailleur Shimano Deore M6000
Bottom Bracket Shell N/A
Crankset FSA Forged Aluminum for Bosch System, 42t, 170mm
Cassette Shimano CS-HG500-10, 11-32t
Chain KMC
Handlebar Alloy, 700mm
Headset Integrated
Stem Alloy, 31.8mm x 80mm, 6°
Seatpost Alloy, 30.9mm
Saddle Custom Ergo Performance
Front Axle Spacing 12x100mm (Thru-Axle)
Rear Axle Spacing 12x142mm
Wheelset Black Anodized Aluminum Clincher , Formula
Front Tire Schwalbe Super Moto, 27.5" x 2.4"
Rear Tire Schwalbe Super Moto, 27.5" x 2.4"
Tire Type Clincher
Tubeless Compatibility Wheels are not tubeless compatible
Motor Bosch Performance Line Speed
Torque 85Nm
Wattage 250w
Battery Bosch PowerTube 500Wh
Top Speed 28mph
Mileage 180mi
Key Included yes
Charger Included yes
Pedals Sold separately
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Bike geometry chart
Inspected. Tested. Trusted.

What is CPO?

CPO bikes are gently ridden bikes that have been meticulously inspected, restored and serviced. Every CPO bike is cleaned, tuned and tested in our top-of-the-line Colorado headquarters. Road, mountain, ebike or gravel, TPC services each bike over 8 phases and multiple points of inspection.

Bikes are meant
to be used.