7/09/2010

Diamondback Jr Viper BMX Bike (20-Inch Wheels) Review

Diamondback Jr Viper BMX BikeI purchased this bicycle for my son's 8th birthday. He has been off trainers for a while and is ready for handle brakes. I like that the bike has both a handle brake and a pedal brake. This is perfect for this learning transition. Shorter riders will quickly realize that grabbing the handle brake can help in steadying the bike while mounting.

I am very impressed with the quality of parts. Aluminum rims, easily adjustable gooseneck, long seat post for maximum adjustability, these features can be very helpful in extending the life of the bike.

The size of the bike frame and riding position fit my son perfectly. For your consideration I will say the frame minimum standing clearance is 20 inches. I do not recommend this bike for a child whose inseam is less than 21 inches. My son measures 21 inch inseam and is very comfortable riding.

The package arrived with a full set of allen wrenches and a open ended wrench. All tools necessary for initial assembly are in the box. If you buy, be sure to check all bolts before riding. The factory does not always get every one tight.

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Product Description:
Give your child the gift of BMX racing performance without breaking the bank with the Diamondback Jr. Viper 20-inch BMX bike. The Jr. Viper is built using the same straightforward design as the full-size Diamondback Viper, but in a lower-profile frame designed for smaller riders. The Jr. Viper is equipped with such high-quality features as a heavy-duty steel frame and fork, 36-spoke aluminum wheels, a padded seat, rush alloy linear pull and coaster brakes, and DB "icon" grips with bar ends. The Jr. Viper is an ideal 20-inch wheeled BMX bike for beginners.
Specifications:

    Geometry: 74-degree head tube, 70-degree seat tube, 19.5-inch top tube, and 14.5-inch chain stay
    Frame: Hi-Ten steel
    Fork: Hi-Ten steel
    Headset: FSA 1-inch threadless
    Handlebar: Hi-Ten steel 2-piece, 25 inches wide by 6.75-inch rise
    Grips: DB icon with flange, plastic bar end caps
    Stem: 4-bolt alloy top load
    Brakes: Rush linear
    Brake levers: Rush Rx 2.1
    Cranks: 165mm steel, 1-piece
    Sprocket: 44t steel
    BB: Loose ball
    Pedals: Resin platform
    Rims: 36H aluminum, 30mm wide, anodized black
    Hubs: 36H steel shell with 3/8-inch axle (front and rear)
    Chain: KMC Z410, 1/2 by 1/8
    Freewheel: 16t
    Tires: Comp III style, 20 x 1.25 (front), 1.75 (rear)
    Spokes: 14g
    Seat: DB BMX padded
    Seatpost: Steel pillar

Manufacturer's Warranty
Lifetime on the frame, 5 years on the fork, 1 year on components, 1 year on labor for the frame, 30 days on labor for parts


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