VelopediaBicycle Archive ยท Specification report

2008 GT Power Series Ultra-Box

Velopedia Archive ID 13601

Overview

Model year2008
BrandGT
ModelPower Series Ultra-Box
Bicycle typeBMX
Archive ID13601
Original MSRP$799.99
ColorsSilver/Black
SizesOne size fits all

Frameset

Frame constructionTIG-welded
Frame materialGT 6061 Aluminum
ForkGT Aluminum
Fork materialAluminum, single crown
Rear shockN/A

Drivetrain

Component groupBMX
ShiftersN/A
Front derailleurN/A
Rear derailleurN/A
CranksetTruVativ Racing Team
Bottom bracketTruVativ Gigapipe DH ISIS
Rear cogs1-speed, 14, 15, 16 teeth
ChainKMC Z610HX
PedalsGT Alum Platform with cr-mo spindles

Brakes

BrakesTektro BX-25 rear brakes, Tektro BX-2 Sabre rear levers

Cockpit & contact points

HeadsetFSA Orbit Z
HandlebarGT BMX cro-moly
Handlebar extensionsNot included
StemGT BMX Race
SaddleSDG I-Fly I-Beam
SeatpostSDG I Fly

Wheels & tires

HubsFront: GT aluminum sealed, Rear: Joy Tech cassette
RimsAlex Supra Dome, 36-hole
Spokes14ga. (2.0mm)
Spoke nipplesAluminum nipples
Front tire20" Kenda Small Block Eight
Wheel size20" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 7, 2026.