GT Thumper 2003 Technical specs and features
| Brand | GT |
| Model | Thumper |
| First production | 2003 |
| 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 | 20 X 2.10 (inches) GT LP-4 |
| 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 G22 |
| 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 Tange-Seiki TGMX |
Gearing Specs
| 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 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 | - Moro Blue - TT Gray |
| Weight | Unspecified |
| Pedals details | GT Johnson Design |
| 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 2003 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 a few colors, among these colors Moro Blue and TT Gray .
This bike is equiped with 20 x 2.10" GT LP-4 tires and Stainless steel spoke wheel while the rims are manufactured by Alex G22, 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 410 chain that is easily replaceable as stated by GT.
