Bicycle Archive · Specification report

2005 GT Bump

Velopedia Archive ID 93627

Overview

Model year	2005
Brand	GT
Model	Bump
Bicycle type	Freestyle/jumping
Archive ID	93627
Original MSRP	$269.99
Colors	Deep Artic Blue, Madness Pewter

Frameset

Frame construction	TIG-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 tubular chromoly, 39 teeth
Rear cogs	1-speed, 14 teeth
Chain	KMC Z410, 1/2 x 1/8"
Pedals	GT Dirt/Street

Brakes

Brakes	Tektro 907AD rear brakes, Tektro 274A rear levers

Cockpit & contact points

Headset	1 1/8" threadless Tange Seiki Fatty 22
Handlebar	Chromoly 2-piece
Stem	GT Johnson III
Saddle	GT-6 Original
Seatpost	Aluminum micro-adjust

Wheels & tires

Hubs	Aluminum, 3/8" axle
Rims	Alex G22
Spokes	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-IV
Wheel size	20" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 24, 2026.