Bicycle Archive · Specification reportBicycle Archive · Specification report2008 GT Bump · 2007 GT Bump
| Specification | 2008 GT Bump | 2007 GT Bump |
|---|---|---|
| Overview | ||
| Model year | 2008 | 2007 |
| Brand | GT | GT |
| Model | Bump | Bump |
| Bicycle type | BMX | Freestyle/jumping |
| Archive ID | 13609 | 16100 |
| Original MSRP | $279.99 | $269.99 |
| Colors | Off White/Orange, Navy/White | Matte Navy Blue, Matte Brick |
| Sizes | One size fits all | 20" wheel |
| Frameset | ||
| Frame construction | TIG-welded | TIG-welded |
| Frame material | GT cro-moly BMX dirt/street design | Chromoly |
| Fork | GT BMX design | '05 GT dirt jump |
| Fork material | Chromoly, unicrown crown | Chromoly, unicrown crown |
| Rear shock | N/A | N/A |
| Drivetrain | ||
| Component group | BMX | BMX Mix |
| Shifters | N/A | N/A |
| Front derailleur | N/A | N/A |
| Rear derailleur | N/A | N/A |
| Crankset | GT Tubular Cr-Mo 3pc. | GT Tubular Cr-Mo 3pc. |
| Bottom bracket | Ball type with 8 spline Cr-Mo axle | Ball type with 8 spline Cr-Mo axle |
| Rear cogs | 1-speed, 12 teeth | 1-speed, 12 teeth |
| Chain | KMC Z410 | KMC Z410 |
| Pedals | GT Dirt/Street platform | '05 GT Dirt/Street platform design, aluminum body, cr-mo alxe |
| Brakes | ||
| Brakes | N/A front/Tektro 907A rear brakes, Tektro 274A rear levers | Tektro, FX-330 rear brakes, Tektro 274A levers |
| Cockpit & contact points | ||
| Headset | 1 1/8" Tange Seiki Fatty 22 | 1 1/8" threadless Tange Seiki FATTY 22 |
| Handlebar | GT dirt/street Cr-mo | GT dirt/street Cr-mo |
| Handlebar extensions | Not included | Not included |
| Stem | GT FS design | GT FS design |
| Saddle | BMX mini street | Velo mini street |
| Seatpost | Aluminum micro-adjust | Alloy Micro adjust |
| Wheels & tires | ||
| Hubs | Front: GT aluminum sealed, Rear: GT sealed cassette | Front: GT aluminum sealed, Rear: GT sealed cassette |
| Rims | 36-hole | Alex G22, 36-hole |
| Spokes | 14ga. (2.0mm) | 14ga. (2.0mm) straight gauge |
| Spoke nipples | Brass nipples | Brass nipples |
| Front tire | 20" Kenda K-Rad | Front: 26 x 2.125" Front: Kenda K-Rad, Rear: 26 x 2.10" Kenda Konxsion |
| Rear tire | 20" Kenda Konxsion | — |
| Wheel size | 20" wheels | 26" wheels |
Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on November 13, 2026.