Robinson JR. 1997 VS Hoffman Bikes MANTRA 18 PL 2009 specs comparison
Robinson Jr.
General Infos| Model | Jr. |
| Manufacturer | Robinson |
| Year of production | 1997 |
| Current price | Check price Here ==> |
| Color choice | -Ball burnished |
| Sizes | - Boys |
| Sizes | - Boys |
Wheels And Breaking System
| Bike front tire | 20 X 1 1/8 (inches) GT AA Pro Kevlar |
| Bike rear tire | Not Available |
| Bike wheel size | 20 (inches) Wheels |
| Brakeset type | Dia-Compe MX-122 Jr. LeversDia-Compe Aluminum Side-pull Caliper Rear Brakes |
| Hubs for disc brakes | GT Mohawk |
| Rims manufacturer | 36-holeAraya |
| Spoke nipples type | Alloy Nipples |
| Spoke wheel | 2.0 (millimeters) Straight GaugeSteel |
Frame and Body Specs
| Frame materials | Aluminum |
| Frame type | TIG-welded |
| Handlebar construction | Robinson Aluminum |
| Handlebar extender | Not Available |
| Handlebar stem details | GT Aluminum |
| Headset size | 1 (inches) Threadless Steel |
Gearing Specifications
| Bicycle chain | 1/2 X 3/32 (inches)KMC 410 |
| Bottom bracket shell width | 68 (millimeters) English |
| Bottom bracket type | Not Available |
| Crankset parts and sizes | 39 Teeth3-piece Aluminum |
| Gear shift levers | Not Available |
| Rear gear set | 16 Teeth1-speed |
Robinson Jr. Fork System Data
| Derailleur (Front) | Not Available |
| Derailleur (Rear) | Not Available |
| Fork material | Unicrown CrownChromoly |
| Fork type | Robinson |
Other Specs of Robinson Jr.
| Component group sets | Not Available |
| Pedals details | GT Aluminum Platforms |
| Rear shock absorber | Not Available |
| Saddle seat | GT Plastic |
| Seat post extension | AluminumPillar |
Hoffman Bikes Mantra 18 PL
General Infos| Model | Mantra 18 PL |
| Manufacturer | Hoffman Bikes |
| Year of production | 2009 |
| Current price | Check price Here ==> |
| Color choice | - Deep Purple-Gray |
| Sizes | - 18 TT (inches) |
Wheels And Breaking System
| Bike front tire | Rear: 20 X 1.95 (inches) HB SkidmarkFront: 20 X 2.125 (inches) HB Skidmark |
| Bike rear tire | Not Available |
| Bike wheel size | 20 (inches) Wheels |
| Brakeset type | Unavailable Rear LeversU-Brake Rear Brakes |
| Hubs for disc brakes | Rear: Sealed 14 (millimeters) CassetteFront: Alloy 3/8 (inches) |
| Rims manufacturer | 36-hole Rear: Alienation CPFront: Jalco Double Wall |
| Spoke nipples type | Not Available |
| Spoke wheel | Not Available |
Frame and Body Specs
| Frame materials | 4130 chromoly c |
| Frame type | TIG-welded |
| Handlebar construction | HB 2-piece Full Chromoly |
| Handlebar extender | Optional |
| Handlebar stem details | Not Available |
| Headset size | 1 1/8 (inches) FSA Impact |
Gearing Specifications
| Bicycle chain | Not Available |
| Bottom bracket shell width | Not Available |
| Bottom bracket type | Mid Sealed BB |
| Crankset parts and sizes | 27 Teeth3 Piece Tubular Chromoly |
| Gear shift levers | Not Available |
| Rear gear set | 11 Teeth1-speed |
Hoffman Bikes Mantra 18 PL Fork System Data
| Derailleur (Front) | Not Available |
| Derailleur (Rear) | Not Available |
| Fork material | Unicrown CrownChromoly |
| Fork type | Hoffman Fat Free |
Other Specs of Hoffman Bikes Mantra 18 PL
| Component group sets | BMX |
| Pedals details | Alloy Platform |
| Rear shock absorber | Not Available |
| Saddle seat | HB Kevlar |
| Seat post extension | 25.4 (millimeters) DiameterAlloy Micro Adjust |
Useful links and guides ....
- To know more about this exacte bike, Robinson provided us with the latest version of its Jr. bike manual
- Find All parts, tires and accessories of Robinson Jr. BMX here
- Get your Hoffman Bikes Mantra 18 PL manual book version yo know further about this bike
- Saddles, tires And mechanical parts for Hoffman Bikes Mantra 18 PL BMX here