Bicycle Archive · Specification report

Bicycle comparison

2004 GT Power Series Jr. · 2007 GT Power Series Jr.

Specification	2004 GT Power Series Jr.	2007 GT Power Series Jr.
Overview
Model year	2004	2007
Brand	GT	GT
Model	Power Series Jr.	Power Series Jr.
Bicycle type	BMX	BMX
Archive ID	31445	16139
Original MSRP	$299.99	$399.99
Colors	Blue	Blue/Black
Sizes	Junior	20" wheel
Frameset
Frame construction	TIG-welded	TIG-welded
Frame material	6061 T6 aluminum	6061 T6 aluminum
Fork	GT	GT BMX design
Fork material	Chromoly, unicrown crown	Aluminum/chromoly, unicrown crown
Rear shock	N/A	N/A
Drivetrain
Component group	N/A	BMX Mix
Shifters	N/A	N/A
Front derailleur	N/A	N/A
Rear derailleur	N/A	N/A
Crankset	3-piece aluminum, 38 teeth	GT forged aluminum 3pc.
Bottom bracket	Sealed cartridge	Euro cartridge
BB shell width	68mm English	—
Rear cogs	1-speed, 15 teeth	1-speed, 14 teeth
Chain	KMC Z30, 1/2 x 1/8"	KMC Z610
Pedals	Aluminum	Aluminum body with bolt on aluminum cage
Brakes
Brakes	Tektro 926A Mini V rear brakes, Tektro 316A rear levers	Alloy side-pull caliper front/Tektro, 926AL rear brakes, Mini BMX levers
Cockpit & contact points
Headset	1" Semi integrated threadless	1" integrated FSA Orbit IS-2A
Handlebar	GT Mini BMX	GT BMX aluminum
Handlebar extensions	N/A	Not included
Stem	GT Mini Piston	GT Mini Piston
Saddle	GT Mini	GT Mini
Seatpost	Aluminum, 22.2mm (7/8 inch) diameter	Aluminum, 22.2mm (7/8 inch) diameter
Wheels & tires
Hubs	GT Mini	Front: GT BMX sealed, Rear: BMX Race cassette
Rims	Alex DR-13, 28-hole	Sun M13-II, 28-hole
Spokes	Steel, 15ga. (1.8mm) straight gauge	15ga. (1.8mm) straight gauge
Spoke nipples	Aluminum nipples	Aluminum nipples
Front tire	20 x 1 1/8" IRC Siren	20 x 1-3/8" Kenda Small Block Eight
Wheel size	20" wheels	20" wheels

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