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.Sturdy steel frame and fork are built to handle the rigors of ridingSingle-speed drivetrain offers simplicity and low maintenanceLinear-pull rear brake provides stopping power when neededStout BMX 20 in. wheels are outfitted with Comp III style tires for all-around performanceSpecs on the Diamondback Jr. Viper 20 in. boys' bike are subject to changeAll 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.Imported. Item 862827