Bicycle Archive · Specification report

2011 GT Bump

Velopedia Archive ID 25117

Overview

Model year	2011
Brand	GT
Model	Bump
Bicycle type	BMX
Archive ID	25117
Colors	White, matte green

Frameset

Frame construction	Steel
Frame material	CroMo
Fork	Cromo
Fork material	Steel
Rear shock	N/A

Drivetrain

Component group	BMX Mix
Crankset	CroMO 3 piece, 25t teeth
Bottom bracket	Sealed Bearing
Cassette	Cassette cog
Rear cogs	9 teeth
Chain	KMC Z510
Pedals	GT Dirt/Street platform

Cockpit & contact points

Headset	1 1/8" integrated
Handlebar	GT Pro Steel
Handlebar extensions	Not included
Stem	GT freestyle drop
Saddle	Pivotal Street Design
Seatpost	Pivotal, 25.4mm diameter

Wheels & tires

Hubs	Front: GT Aluminum, Rear: GT Alloy
Rims	Alienation PBR, 32-hole/36-hole
Spokes	14ga. (2.0mm)
Spoke nipples	Brass
Front tire	Front: 20 x 2.125" Kenda K-Rad, Rear: 20 x 2.1" Kenda Ko-Rolla
Wheel size	20" wheels

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