Bicycle Archive · Specification report

1998 GT Speed Series Jr

Velopedia Archive ID 79735

Overview

Model year	1998
Brand	GT
Model	Speed Series Jr
Bicycle type	BMX
Archive ID	79735
Original MSRP	$689.00
Colors	Ball-burnished
Sizes	Junior

Frameset

Frame construction	TIG-welded
Frame material	6061 T6 aluminum
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 3-piece jr aluminum
Bottom bracket	GT cartridge
Rear cogs	1-speed
Chain	1/2 x 1/8"
Pedals	Victor VP-103 clipless

Brakes

Brakes	Tektro dual-pivot caliper brakes, Dia-Compe MX-122 levers

Cockpit & contact points

Headset	1" threadless Aheadset DX2
Handlebar	GT Jr aluminum
Handlebar extensions	N/A
Stem	GT Mini Piston
Saddle	GT
Seatpost	GT aluminum

Wheels & tires

Hubs	GT Mohawk
Rims	Weinmann Mini Zac, 28-hole
Spokes	Stainless steel, 2.0mm straight gauge
Spoke nipples	Alloy nipples
Front tire	20 x 1 1/8" GT AA Pro
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	457.2 mm
Head-tube angle	73°
Seat-tube angle	69°
Chainstay / rear center	355.6 mm
Wheelbase	863.6 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 12, 2026.