GT THUMPER 2003 VS Dirtmaster H.F.O. 1999 specs comparison
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➜ GT Thumper price
➜ Dirtmaster H.F.O. price
GT Thumper
General Infos| Model | Thumper |
| Manufacturer | GT |
| Year of production | 2003 |
| Current price | 🛒 View Price → |
| Color choice | - TT Gray-Moro Blue |
| Sizes | - One |
| Sizes | - One |
Wheels And Breaking System
| Bike front tire | 20 X 2.10 (inches) GT LP-4 |
| Bike rear tire | Not Available |
| Bike wheel size | 20 (inches) Wheels |
| Brakeset type | Tektro 273A Rear LeversTektro FX-11 U-brake Rear Brakes |
| Hubs for disc brakes | 14 (millimeters) AxleAluminum |
| Rims manufacturer | 36-holeAlex G22 |
| Spoke nipples type | Brass Nipples |
| Spoke wheel | 14ga. Straight GaugeStainless Steel |
Frame and Body Specs
| Frame materials | Chromoly |
| Frame type | TIG-welded |
| Handlebar construction | GT BMX |
| Handlebar extender | Not Available |
| Handlebar stem details | GT Piston |
| Headset size | 1 1/8 (inches) Threadless Tange-Seiki TGMX |
Gearing Specifications
| Bicycle chain | 1/2 X 3/16 (inches)KMC 410 |
| Bottom bracket shell width | American |
| Bottom bracket type | Not Available |
| Crankset parts and sizes | 39 TeethGT 3-piece Chromoly |
| Gear shift levers | Not Available |
| Rear gear set | 14 Teeth1-speed |
GT Thumper Fork System Data
| Derailleur (Front) | Not Available |
| Derailleur (Rear) | Not Available |
| Fork material | Unicrown CrownChromoly |
| Fork type | GT |
Other Specs of GT Thumper
| Component group sets | Not Available |
| Pedals details | GT Johnson Design |
| Rear shock absorber | Not Available |
| Saddle seat | GT Launch Pad |
| Seat post extension | Steel Micro-adjust |
Dirtmaster H.F.O.
General Infos| Model | H.F.O. |
| Manufacturer | Dirtmaster |
| Year of production | 1999 |
| Current price | 🛒 View Price → |
| Color choice | - Chrome-Plated- Red- Yellow-Black |
| Sizes | - Pro |
Wheels And Breaking System
| Bike front tire | 20 X 2.25 (inches) Kenda K-841 |
| Bike rear tire | Not Available |
| Bike wheel size | 20 (inches) Wheels |
| Brakeset type | Dia-Compe Tech 99 LeversDia-Compe 990 Brakes |
| Hubs for disc brakes | Joy Tech Jy A085SBT |
| Rims manufacturer | 48-holeAlex Supra |
| Spoke nipples type | Brass Nipples |
| Spoke wheel | 2.0 (millimeters) Straight GaugeDa-Sen Stainless Steel |
Frame and Body Specs
| Frame materials | 4130 chromoly c |
| Frame type | TIG-welded |
| Handlebar construction | Dirtmaster Hoochie |
| Handlebar extender | Not Available |
| Handlebar stem details | Odyssey Bang |
| Headset size | 1 1/8 (inches) Threadless Aheadset SE-1 F and S With Odyssey Gyro Detangler |
Gearing Specifications
| Bicycle chain | 1/2 X 3/32 (inches)KMC 408H |
| Bottom bracket shell width | American 24tpi |
| Bottom bracket type | YST BB 621 |
| Crankset parts and sizes | 44 Teeth1-piece Chromoly 180 (millimeters) |
| Gear shift levers | Not Available |
| Rear gear set | 16 Teeth1-speed |
Dirtmaster H.F.O. Fork System Data
| Derailleur (Front) | Not Available |
| Derailleur (Rear) | Not Available |
| Fork material | Unicrown Crown4130 Chromoly |
| Fork type | Dirtmaster Street Fork |
Other Specs of Dirtmaster H.F.O.
| Component group sets | Not Available |
| Pedals details | Wellgo LU-313U |
| Rear shock absorber | Not Available |
| Saddle seat | Team Products Embroidered |
| Seat post extension | 25.4 (millimeters) DiameterPrimo Rod |
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Useful links and guides ....
- To know more about this exacte bike, GT provided us with the latest version of its Thumper bike manual
- Find All parts, tires and accessories of GT Thumper Freestyle here
- Get your Dirtmaster H.F.O. manual book version yo know further about this bike
- Saddles, tires And mechanical parts for Dirtmaster H.F.O. Freestyle here