Bicycle Archive · Specification report

1999 GT Mach One (01)

Velopedia Archive ID 89775

Overview

Model year	1999
Brand	GT
Model	Mach One (01)
Bicycle type	BMX
Archive ID	89775
Original MSRP	$281.99
Colors	Black/Green, High Octane Red
Sizes	Boys

Frameset

Frame construction	Welded
Frame material	Chromoly
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 1-piece chromoly
Bottom bracket	One piece
Rear cogs	1-speed, 16 teeth
Chain	1/2 x 1/8"
Pedals	GT aluminum platform

Brakes

Brakes	Tektro linear-pull rear brakes, Tektro linear-pull rear levers

Cockpit & contact points

Headset	1 1/8" threadless Aheadset
Handlebar	GT
Handlebar extensions	N/A
Stem	GT Piston
Saddle	GT Drop Nose
Seatpost	GT aluminum micro-adjust

Wheels & tires

Hubs	GT Mohawk
Rims	Weinmann ZAC-X
Spokes	2.0mm straight gauge
Spoke nipples	Brass nipples
Front tire	Front: 20 x 2.125" GT AA Pro, Rear: 20 x 1.75" GT AA Pro
Wheel size	20" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 9, 2026.