Diamondback Boy's Viper 20" Bike

Priced: $159.00 Rated:   - 1 stars out of 5 by 1 review.
Diamondback Viper 20" Bike
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Color: Green
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Diamondback Viper 20" Bike -

A great bike for kids ready for longer distances and more independence, the Diamondback Jr. Viper 20 in. boys' bike is ready to roll to school, follow along on the riverside path or hit the BMX park.

All bicycles sold at REI include a free warranty tune-up. New bikes go through a normal break-in period, after which readjustment is important for longevity and performance. Bring your new bike in to your local REI for its free tune-up within 20 hours of use or 6 months from purchase, whichever comes first. Contact your nearest REI bike shop to schedule this important service.



  • Sturdy steel frame and fork are built to handle the rigors of riding


  • Specs on the Diamondback Jr. Viper 20 in. boys' bike are subject to change
  • Stout BMX 20 in. wheels are outfitted with Comp III style tires for all-around performance
  • Linear-pull rear brake provides stopping power when needed
  • Single-speed drivetrain offers simplicity and low maintenance
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Also available for: Kids
Bike frame material:Steel
Bike style:BMX bike
Bike suspension:No suspension
Bike weight:How we measure bike weight
Bottom bracket:Loose ball
Brake levers:Rush RX2.1
Brake type:Coaster brake
Brakes:Rush V-brake
Chain:KMC Z410
Crankset:1-piece steel, 36t
Fork:BMX high-tensile steel
Frame:DB high-tensile steel
Front hub:Steel, 36h
Handlebar:Steel BMX
Handlebar shape:BMX bar
Headset:Threaded steel
Pedals:Resin platform
Rear cogs:18t freewheel
Rear hub:Steel, 36h
Saddle:DB BMX Padded
Seat post:Steel pillar
Stem:Alloy quill
Tires:Comp III Style, 20x1.75
Wheel size:20 inches

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Diamondback Viper 20" Bike Review:


Never shipped

I ordered this bike for my sons 6 birthday 8 days in advance of the big day. It was supposed to arrive 2 days prior his birthday but it was never shipped. I found this out not from REI but from UPs on the expected date of delivery. I will never buy anything from REI ever again. If I receive anything that was purchased from REI as a gift I return it immediately or simply throw it in the garbage. Thanks for ruining what was to be a great birthday!
Upset parent at REI on 10/10/2013