Bicycle Archive · Specification reportBicycle Archive · Specification report2004 GT Power Series Ultra Box · 2006 GT Power Series Ultra Box
| Specification | 2004 GT Power Series Ultra Box | 2006 GT Power Series Ultra Box |
|---|---|---|
| Overview | ||
| Model year | 2004 | 2006 |
| Brand | GT | GT |
| Model | Power Series Ultra Box | Power Series Ultra Box |
| Bicycle type | BMX | BMX |
| Archive ID | 31454 | 11418 |
| Original MSRP | $699.99 | $749.99 |
| Colors | Blue | Team Blue/Silver two tone |
| Sizes | Pro XL | 20" wheel |
| Frameset | ||
| Frame construction | TIG-welded | TIG-welded |
| Frame material | 6061 T6 aluminum | GT Ultra Box design, 6061-T6 aluminum |
| Fork | GT | GT BMX design |
| Fork material | Chromoly, unicrown crown | Aluminum/chromoly |
| Rear shock | N/A | N/A |
| Drivetrain | ||
| Component group | N/A | BMX |
| Shifters | N/A | N/A |
| Front derailleur | N/A | N/A |
| Rear derailleur | N/A | N/A |
| Crankset | TruVativ Racing Team, 44 teeth | Truvativ 180mm "Racing Team", 44 teeth |
| Bottom bracket | TruVativ GIGA pipe DH | TruVativ GIGA pipe DH |
| BB shell width | 68mm English | — |
| Rear cogs | 1-speed, 16 teeth | 1-speed, 16 teeth |
| Chain | KMC Z610HX, 1/2 X 1/8" | KMC Z610HX |
| Pedals | Wellgo clipless | GT design, CNC aluminum platform, CNC cr-mo axle, sealed bearings |
| Brakes | ||
| Brakes | Tektro BX-25 rear brakes, Tektro BX-2 rear levers | Alloy side-pull caliper front/Tektro, BX-25, cold forged aluminum, cartridge pads rear brakes, Tektro, BX-2 "Sabre", hinged clamp, aluminum levers |
| Cockpit & contact points | ||
| Headset | 1 1/8" threadless FSA Orbit Z | FSA "Orbit Z" |
| Handlebar | GT BMX | GT BMX Race bend, Cr-mo, 7.9" rise |
| Handlebar extensions | N/A | N/A |
| Stem | GT Piston | '05 GT BMX Race design, cold forged aluminum |
| Saddle | SDG I-Fly | SDG "I-Fly" railess design, stitched cover |
| Seatpost | SDG I-Fly, 27.0mm diameter | SDG "I-Fly" aluminum micro adjust design |
| Wheels & tires | ||
| Hubs | GT BMX | '05 GT BMX branded, aluminum body, Sealed Bearings, Hollow Cr-Mo axle |
| Rims | Alex Supra B, 36-hole | Sun Rhyno Lite XL, welded double wall with eyelets, 36 hole, 29mm width, 36-hole |
| Spokes | Steel, 14ga. (2.0mm) straight gauge | 14ga. (2.0mm) Straight Gauge |
| Spoke nipples | Brass nipples | Aluminum, 14 G, Black |
| Front tire | 20 x 2.125" IRC Siren | 20 x 1.95" Kenda K-Rad |
| Rear tire | 20 x 1.75" IRC Siren | 20 x 1.75" Kenda K-Rad |
| 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 12, 2026.