Bicycle Archive · Specification report

Bicycle comparison

2008 GT Bump · 2006 GT Bump

Specification	2008 GT Bump	2006 GT Bump
Overview
Model year	2008	2006
Brand	GT	GT
Model	Bump	Bump
Bicycle type	BMX	BMX
Archive ID	13609	11306
Original MSRP	$279.99	$269.99
Colors	Off White/Orange, Navy/White	RootBeer Brown, Pink
Sizes	One size fits all	20" wheel
Frameset
Frame construction	TIG-welded	TIG-welded
Frame material	GT cro-moly BMX dirt/street design	3-tube chromoly
Fork	GT BMX design	'05 GT dirt jump design
Fork material	Chromoly, unicrown crown	Chromoly
Rear shock	N/A	N/A
Drivetrain
Component group	BMX	BMX
Shifters	N/A	N/A
Front derailleur	N/A	N/A
Rear derailleur	N/A	N/A
Crankset	GT Tubular Cr-Mo 3pc.	GT Tubular Cr-Mo 3pc, 36 teeth
Bottom bracket	Ball type with 8 spline Cr-Mo axle	Steel, ball type
Rear cogs	1-speed, 12 teeth	1-speed, 13 teeth
Chain	KMC Z410	KMC Z410
Pedals	GT Dirt/Street platform	'05 GT Dirt/Street platform design, aluminum body, cr-mo alxe
Brakes
Brakes	N/A front/Tektro 907A rear brakes, Tektro 274A rear levers	Alloy side-pull caliper front/Tektro, 907AD, dual anchor bolts, forged aluminum U-brake rear brakes, Tektro, 274A, aluminum levers
Cockpit & contact points
Headset	1 1/8" Tange Seiki Fatty 22	1 1/8" Tange Seiki FATTY 22, extra deep cup engagement
Handlebar	GT dirt/street Cr-mo	GT dirt/street bend, Cr-mo, 7" rise
Handlebar extensions	Not included	N/A
Stem	GT FS design	GT Johnson III design, cold forged aluminum
Saddle	BMX mini street	GT "Star 19" two piece design, 9mm rails
Seatpost	Aluminum micro-adjust	Aluminum double bolt micro adjust
Wheels & tires
Hubs	Front: GT aluminum sealed, Rear: GT sealed cassette	Front: '05 GT branded, aluminum body, sealed Mech. bearings, 3/8" Cr-Mo axle, 36 h, Rear: '05 GT branded, aluminum body, sealed Mech. bearins, 14mm Cr-Mo axle, 36 ho
Rims	36-hole	Alex G22, aluminum, 36 hole, 30mm width, 36-hole
Spokes	14ga. (2.0mm)	14ga. (2.0mm) Straight Gauge
Spoke nipples	Brass nipples	Brass nipples
Front tire	20" Kenda K-Rad	26 x 2.20" GT-1453
Rear tire	20" Kenda Konxsion	26 X 2.10" GT LP-IV
Wheel size	20" wheels	26" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on November 13, 2026.