Specialized HARDROCK 20 1997 VS Trek JET 12 2008 specs comparison
Specialized Hardrock 20
General Infos| Model | Hardrock 20 |
| Manufacturer | Specialized |
| Year of production | 1997 |
| Current price | Check price Here ==> |
| Color choice |
- pink -Black |
| Sizes |
- Boys - girls |
| Sizes |
- Boys - girls |
Wheels And Breaking System
| Bike front tire | 20 X 1.80 (inches) Specialized Ground Control |
| Bike rear tire | Not Available |
| Bike wheel size | 20 (inches) Wheels |
| Brakeset type | Dia-Compe PC-1N Junior Levers Aluminum Cantilever Brakes |
| Hubs for disc brakes | Nutted Steel |
| Rims manufacturer | 36-hole Aluminum |
| Spoke nipples type | Brass Nipples |
| Spoke wheel | 2.0 (millimeters) Straight Gauge Steel |
Frame and Body Specs
| Frame materials | SBC DirectDrive |
| Frame type | TIG-welded |
| Handlebar construction | Steel |
| Handlebar extender | Not Available |
| Handlebar stem details | Steel |
| Headset size | 1 (inches) |
Gearing Specifications
| Bicycle chain | 1/2 X 3/32 (inches) |
| Bottom bracket shell width | American 24tpi |
| Bottom bracket type | One Piece |
| Crankset parts and sizes | 40 Teeth 1-piece Steel |
| Gear shift levers | Grip Shift MRX-170 |
| Rear gear set | 14 - 28 Teeth 6-speed |
Specialized Hardrock 20 Fork System Data
| Derailleur (Front) | Not Available |
| Derailleur (Rear) | Shimano Tourney TY-22 |
| Fork material | Unicrown Crown Hi-tensile Steel |
| Fork type | SBC |
Other Specs of Specialized Hardrock 20
| Component group sets | Not Available |
| Pedals details | Resin |
| Rear shock absorber | Not Available |
| Saddle seat | SBC Mini |
| Seat post extension | 26.2 (millimeters) Diameter Steel Pillar |
Trek Jet 12
General Infos| Model | Jet 12 |
| Manufacturer | Trek |
| Year of production | 2008 |
| Current price | Check price Here ==> |
| Color choice |
-Silver and Blue |
| Sizes |
- Boys 12 (inches) |
Wheels And Breaking System
| Bike front tire | 12 X 2.125 (inches) Cross Knobby |
| Bike rear tire | Not Available |
| Bike wheel size | 12 (inches) Wheels |
| Brakeset type | Coaster Brake Rear |
| Hubs for disc brakes | Steel |
| Rims manufacturer | 20-hole Chrome Plated |
| Spoke nipples type | Not Available |
| Spoke wheel | Not Available |
Frame and Body Specs
| Frame materials | Steel |
| Frame type | TIG-welded |
| Handlebar construction | Steel With Dialed 12 (inches) Grips |
| Handlebar extender | Optional |
| Handlebar stem details | Alloy and Steel Quill |
| Headset size | Adjustable Ball Bearing |
Gearing Specifications
| Bicycle chain | Not Available |
| Bottom bracket shell width | Not Available |
| Bottom bracket type | Not Available |
| Crankset parts and sizes | 24 Teeth Dialed 2.75 (inches) |
| Gear shift levers | Not Available |
| Rear gear set | 19 Teeth 1-speed |
Trek Jet 12 Fork System Data
| Derailleur (Front) | Not Available |
| Derailleur (Rear) | Not Available |
| Fork material | Unicrown Crown Steel |
| Fork type | Not Available |
Other Specs of Trek Jet 12
| Component group sets | Juvenile Mix |
| Pedals details | Dialed 12 (inches) Platform |
| Rear shock absorber | Not Available |
| Saddle seat | Dialed 12 (inches) |
| Seat post extension | Steel With Dialed Height Indicator |
Useful links and guides ....
- To know more about this exacte bike, Specialized provided us with the latest version of its Hardrock 20 bike manual
- Find All parts, tires and accessories of Specialized Hardrock 20 Youth here
- Get your Trek Jet 12 manual book version yo know further about this bike
- Saddles, tires And mechanical parts for Trek Jet 12 Youth here