VelopediaBicycle Archive · Specification report

2000 GT Thumper

Velopedia Archive ID 45341

Overview

Model year2000
BrandGT
ModelThumper
Bicycle typeFreestyle/jumping
Archive ID45341
Original MSRP$478.00
ColorsGangreen, Propane

Frameset

Frame constructionTIG-welded
Frame materialChromoly
ForkGT
Fork materialChromoly, unicrown crown
Rear shockN/A

Drivetrain

Component groupN/A
ShiftersN/A
Front derailleurN/A
Rear derailleurN/A
CranksetGT 3-piece chromoly, 44 teeth
Bottom bracketSealed cartridge
Rear cogs1-speed, 16 teeth
ChainKMC, 1/2 x 1/8"
PedalsGT aluminum platform

Brakes

BrakesDiaTech 996 U-Brake rear brakes, Dia-Compe MX-101 rear levers

Cockpit & contact points

Headset1 1/8" threadless Aheadset SB-1 w/SST Oryg detangler
HandlebarGT Freestyle
Handlebar extensionsNot included
StemGT Johnson
SaddleGT
SeatpostGT aluminum micro-adjust

Wheels & tires

HubsGT Mohawk
RimsWeinmann ZAC-X, 48-hole
Spokes2.0mm
Spoke nipplesBrass nipples
Front tireFront: 20 x 2.125" Powerlite Retro Tread, Rear: 20 x 1.75" Powerlite Retro Tread
Wheel size20" wheels

Geometry · Legacy reference

Top tube527 mm
Head-tube angle73.5°
Seat-tube angle70°
Chainstay / rear center381 mm
Wheelbase967.5 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 27, 2026.