Bicycle Archive · Specification report

2004 Diamondback Jr. Viper

Velopedia Archive ID 31702

Overview

Model year	2004
Brand	Diamondback
Model	Jr. Viper
Bicycle type	BMX
Archive ID	31702
Original MSRP	$110.00
Colors	Blue Flame, Chrome
Sizes	20"

Frameset

Frame construction	TIG-welded
Frame material	Hi-tensile steel
Fork	Diamondback
Fork material	Hi-tensile steel, unicrown crown
Rear shock	N/A

Drivetrain

Component group	N/A
Shifters	N/A
Front derailleur	N/A
Rear derailleur	N/A
Crankset	OPC w/chainguard
Bottom bracket	One piece
Rear cogs	1-speed, 18 teeth
Chain	KMC, 1/2 x 1/8"
Pedals	BMX style resin

Brakes

Brakes	Coaster w/aluminum linear-pull rear brakes, Steel/alloy w/reach adjust rear levers

Cockpit & contact points

Headset	1" steel
Handlebar	BMX Style w/crossbar
Handlebar extensions	N/A
Stem	BMX 4-Bolt Quill
Saddle	Diamondback BMX Padded
Seatpost	Steel Pillar

Wheels & tires

Hubs	Front: steel, nutted, Rear: steel, coaster brake
Rims	Alloy MTB, 36-hole
Spokes	UCP, 14ga. (2.0mm) straight gauge
Spoke nipples	Brass nipples
Front tire	20 x 1.75" DB BMX
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	488.9 mm
Head-tube angle	71°
Seat-tube angle	69°
Chainstay / rear center	374.6 mm
Wheelbase	894.1 mm
Fork offset / rake	30.5 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 28, 2026.