Bicycle Archive · Specification report

2004 GT Fly

Velopedia Archive ID 31428

Overview

Model year	2004
Brand	GT
Model	Fly
Bicycle type	Freestyle/jumping
Archive ID	31428
Original MSRP	$199.99
Colors	Blue, Yellow
Sizes	One

Frameset

Frame construction	TIG-welded
Frame material	Chromoly down tube/hi-tensile steel
Fork	GT
Fork material	Chromoly, unicrown crown
Rear shock	N/A

Drivetrain

Component group	N/A
Shifters	N/A
Front derailleur	N/A
Rear derailleur	N/A
Crankset	GT one-piece, 39 teeth
BB shell width	American
Rear cogs	1-speed, 16 teeth
Chain	KMC Z410, 1/2 x 3/16"
Pedals	GT BMX Design Aluminum

Brakes

Brakes	Tektro 907A U-brake rear brakes, Tektro 289A rear levers

Cockpit & contact points

Headset	1 1/8" threadless Victor VP-A74F w/SST Oryg
Handlebar	GT BMX
Handlebar extensions	N/A
Stem	GT Piston
Saddle	GT Jr Jump, 9mm rails
Seatpost	Aluminum, 25.4mm diameter

Wheels & tires

Hubs	Steel, nutted
Rims	Jalco, 36-hole
Spokes	Stainless steel, 14ga. (2.0mm) straight gauge
Spoke nipples	Brass nipples
Front tire	Front: 20 x 2.20" GT 1453, Rear: 20 x 2.10" GT LP-4
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	501.6 mm
Head-tube angle	74.5°
Seat-tube angle	71°
Chainstay / rear center	355.6 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 26, 2026.