VelopediaBicycle Archive · Specification report

1998 GT Speed Series

Velopedia Archive ID 71888

Overview

Model year1998
BrandGT
ModelSpeed Series
Bicycle typeBMX
Archive ID71888
Original MSRP$659.00
ColorsBall-burnished
SizesXlarge

Frameset

Frame constructionTIG-welded
Frame material6061 T6 aluminum
ForkGT
Fork materialChromoly, unicrown crown
Rear shockN/A

Drivetrain

Component groupN/A
ShiftersN/A
Front derailleurN/A
Rear derailleurN/A
CranksetGT 3-piece aluminum, 43 teeth
Bottom bracketGT sealed bearing
Rear cogs1-speed, 16 teeth
Chain1/2 x 1/8"
PedalsGT aluminum platforms

Brakes

BrakesDia-Compe VC-757 rear brakes, Dia-Compe MX-1 levers

Cockpit & contact points

Headset1 1/8" threadless Aheadset SX
HandlebarGT chromoly
Handlebar extensionsN/A
StemGT Piston Invet
SaddleGT Drop Nose
SeatpostGT chromoly micro-adjust

Wheels & tires

HubsGT Mohawk
RimsWeinmann Zac 2521
SpokesStainless steel, 2.0mm straight gauge
Spoke nipplesAlloy nipples
Front tireFront: 20 x 2.125" GT AA Pro, Rear: 20 x 1.75" GT AA Pro
Wheel size20" wheels

Geometry · Legacy reference

Top tube533.4 mm
Head-tube angle73°
Seat-tube angle70°
Chainstay / rear center406.4 mm
Wheelbase990.6 mm

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