GT Thumper 2004 Technical specs and features
| Brand | GT |
| Model | Thumper |
| First production | 2004 |
| Bike category | Freestyle |
| Bike sub-category | Freestyle And Jumping |
| Bike Pricing | Check price Here ==> |
| Parts And Accessories | GT Thumper Parts |
| Available Sizes | - One |
Wheels And Breaking System
| Bike front tire | Rear: 20 X 2.10 (inches) GT LP-4 Front: 20 X 2.20 (inches) GT 1453 |
| Bike rear tire | Not Available |
| Bike wheel size | 20 (inches) Wheels |
| Brakeset type | Tektro 273A Rear Levers Tektro FX-11 U-brake Rear Brakes |
| Hubs for disc brakes | 14 (millimeters) Axle Aluminum |
| Rims manufacturer | 36-hole Alex DX-2418 |
| Spoke nipples type | Brass Nipples |
| Spoke wheel | 14ga. Straight Gauge Stainless Steel |
Frame and Body Specifications
| 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 Tien Hsin With SST Oryg |
Gearing Specs
| Bicycle chain | 1/2 X 3/16 (inches) KMC Z510H |
| Bottom bracket shell width | American |
| Bottom bracket type | Not Available |
| Crankset parts and sizes | 39 Teeth GT 3-piece Chromoly |
| Gear shift levers | Not Available |
| Rear gear set | 14 Teeth 1-speed |
GT Thumper Fork System Data
| Derailleur (Front) | Not Available |
| Derailleur (Rear) | Not Available |
| Fork material | Unicrown Crown Chromoly |
| Fork type | GT |
Other Specs of GT Thumper
| Component group sets | Not Available |
| Available colors | - Blue |
| Weight | Unspecified |
| Pedals details | GT BMX Design Aluminum |
| Rear shock absorber | Not Available |
| Saddle seat | GT Launch Pad |
| Seat post extension | Steel Micro-adjust |
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GT produced the Thumper bike in 2004 and can be classified as a Freestyle bicycle, this exact model costs in american market arround $299.99.
GT Freestyle Thumper can be found in one single color which is Blue.
This bike is equiped with Front: 20 x 2.20" GT 1453 tires and Stainless steel spoke wheel while the rims are manufactured by Alex DX-2418, 36-hole. GT equiped this exact model with Tektro FX-11 U-brake rear brakes, Tektro 273A rear levers braking system and Aluminum, 14mm axle hubs.
To guarantee the comfiest ride GT used Chromoly material for the frame. GT BMX high strength material is used on the handlebar of this Thumper to ensure the perfect handling while the stems are made of GT Piston.
For the smoothest biking experience GT 3-piece chromoly, 39 teeth is used on this bicycle linked to KMC Z510H chain that is easily replaceable as stated by GT.