Bicycle Archive · Specification report

2004 Haro Backtrail Z20

Velopedia Archive ID 30795

Overview

Model year	2004
Brand	Haro
Model	Backtrail Z20
Bicycle type	Juvenile
Archive ID	30795
Original MSRP	$150.00
Colors	Absolut Red, Candy Blue, Chrome
Sizes	Junior

Frameset

Frame construction	TIG-welded
Frame material	Chromoly/hi-tensile steel
Fork	Haro BMX OS
Fork material	Unicrown
Rear shock	N/A

Drivetrain

Component group	N/A
Shifters	N/A
Front derailleur	N/A
Rear derailleur	N/A
Crankset	Haro, 40 teeth
Bottom bracket	Fusion sealed
BB shell width	American
Rear cogs	1-speed, 16 teeth
Chain	KMC Z410, 1/2 x 1/8"
Pedals	Haro Small Block resin

Brakes

Brakes	Tektro alloy U-brake rear brakes, Tektro aluminum rear levers

Cockpit & contact points

Headset	1 1/8" threadless Tien Hsin Power Pro
Handlebar	Haro 20" Jr.
Handlebar extensions	N/A
Saddle	Haro
Seatpost	Haro straight, 25.4mm diameter

Wheels & tires

Hubs	Front: steel, nutted, Rear: steel, coaster brake
Rims	Aluminum, 36-hole
Spokes	14ga. (2.0mm) straight gauge
Spoke nipples	Brass nipples
Front tire	Front: 20 x 2.25" Haro Catapult, Rear: 20 x 2.10" Haro Catapult
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	485.1 mm
Head-tube angle	73.5°
Seat-tube angle	71°
Chainstay / rear center	365 mm
Wheelbase	881.4 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 2, 2026.