GT BUMP 2004 VS Hoffman PRO INSTRUMENT 2003 specs comparison
GT Bump
General Infos| Model | Bump |
| Manufacturer | GT |
| Year of production | 2004 |
| Current price | Check price Here ==> |
| Color choice |
- Silver -Red |
| Sizes |
- One |
| 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 274A Rear Levers Tektro 907A 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 Specs
| Frame materials | Chromoly Main Triangle and hi-tensile Steel Rear Stays |
| Frame type | TIG-welded |
| Handlebar construction | GT BMX |
| Handlebar extender | Not Available |
| Handlebar stem details | GT Piston |
| Headset size | 1 1/8 (inches) Threadless Victor VP-A74F |
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 Teeth GT 3-piece Chromoly |
| Gear shift levers | Not Available |
| Rear gear set | 14 Teeth 1-speed |
GT Bump Fork System Data
| Derailleur (Front) | Not Available |
| Derailleur (Rear) | Not Available |
| Fork material | Unicrown Crown Chromoly |
| Fork type | GT |
Other Specs of GT Bump
| Component group sets | Not Available |
| Pedals details | GT Johnson Design |
| Rear shock absorber | Not Available |
| Saddle seat | 9 (millimeters) Rails GT Jr Jump |
| Seat post extension | Steel Micro-adjust |
Hoffman Pro Instrument
General Infos| Model | Pro Instrument |
| Manufacturer | Hoffman |
| Year of production | 2003 |
| Current price | Check price Here ==> |
| Color choice |
- Dark Bronze - Royale Blue -Black |
| Sizes |
- Pro |
Wheels And Breaking System
| Bike front tire | 20 X 1.95 (inches) Hoffman Skid Mark |
| Bike rear tire | Not Available |
| Bike wheel size | 20 (inches) Wheels |
| Brakeset type | Dia-Compe Tech 99 Levers DiaTech 996 U-brake Brakes |
| Hubs for disc brakes | Not Available |
| Rims manufacturer | 48-hole Hoffman HighRoller |
| Spoke nipples type | Aluminum Nipples |
| Spoke wheel | 14ga. Straight Gauge Stainless Steel |
Frame and Body Specs
| Frame materials | 4130 chromoly c |
| Frame type | TIG-welded |
| Handlebar construction | Hoffman Jumping Bars |
| Handlebar extender | Not Available |
| Handlebar stem details | Hoffman Fist |
| Headset size | 1 1/8 (inches) Threadless Aheadset Tank |
Gearing Specifications
| Bicycle chain | 1/2 X 1/8 (inches) KMC 410 |
| Bottom bracket shell width | Not Available |
| Bottom bracket type | Not Available |
| Crankset parts and sizes | 39 Teeth Primo Powerbite |
| Gear shift levers | Not Available |
| Rear gear set | 14 Teeth 1-speed |
Hoffman Pro Instrument Fork System Data
| Derailleur (Front) | Not Available |
| Derailleur (Rear) | Not Available |
| Fork material | Unicrown Crown 4130 Chromoly |
| Fork type | Hoffman Super Fork |
Other Specs of Hoffman Pro Instrument
| Component group sets | Not Available |
| Pedals details | Wellgo LU-313 |
| Rear shock absorber | Not Available |
| Saddle seat | Hoffman Padded Embossed Skull |
| Seat post extension | 25.4 (millimeters) Diameter Chromoly Micro-adjust |
Useful links and guides ....
- To know more about this exacte bike, GT provided us with the latest version of its Bump bike manual
- Find All parts, tires and accessories of GT Bump Freestyle here
- Get your Hoffman Pro Instrument manual book version yo know further about this bike
- Saddles, tires And mechanical parts for Hoffman Pro Instrument Freestyle here