36h steel shell w/ coaster brake, 3/8" axle

For kids making the jump from a push-bike to a “big kid” bike, the Jr Viper fits the bill. This bike has all the features you’d expect in a BMX bike, like a bomber steel frame and fork, sturdy wheels, and beefy tires. Then we added a few extras to help smaller riders enjoy neighborhood jaunts even more: a chain guard to protect skin and clothing, a rear hand brake plus a coaster brake to help ease the transition to braking with their hands, plus super short 140mm cranks sized just right for kids. This model fits riders 44"-54" tall, aged approximately 4-9 years old.

Diamondback VIPER 20

A 20″ steel frame mountain youth bike with coaster brakes.

Frame	Steel
Suspension	Rigid
Fork	Steel
Wheels	20″ Aluminum
Drivetrain	Single-speed
Brakes	Coaster

Frame	Hi-Ten steel
Fork	Hi-Ten steel
Bottom Bracket	Loose ball
Headset	1" threaded
Stem	1" quill steel base w/ alloy clamp
Handlebar	Hi-ten steel 2-piece 24" wide x 6" rise
Saddle	DB BMX padded
Seatpost	Steel pillar Type: Rigid
Pedals	Resin platform
Grips	DB Icon Grip w/ Nylon End Plug

Front Derailleur	N/A
Crank	140mm steel 1-piece
Cassette	18t cog
Chain	KMC Z410 1/2 x 1/8
Brakes	Rush linear rear w/ coaster hub Type: Coaster
Brake Levers	Rush RX2.1

Rims	36h aluminum, 30mm wide, ano black
Spokes	14g
Front Hub	36h steel shell w/ 3/8" axle
Rear Hub	36h steel shell w/ coaster brake, 3/8" axle
Tires	Comp III style 20x2.125"

2023 DiamondbackVIPER 20

2023 Diamondback
VIPER 20