Auburn JR-20RX 1995 VS Mirraco UNDERBOSS 2008 specs comparison
Auburn JR-20RX
General Infos| Model | JR-20RX |
| Manufacturer | Auburn |
| Year of production | 1995 |
| Current price | Check price Here ==> |
| Color choice |
-Blue anodized |
| Sizes |
- Boys |
| Sizes |
- Boys |
Wheels And Breaking System
| Bike front tire | 20 X 1 1/8 (inches) GT AA Pro |
| Bike rear tire | Not Available |
| Bike wheel size | 20 (inches) Wheels |
| Brakeset type | Dia-Compe MX-122 Jr Levers Dia-Compe 500NR Brakes |
| Hubs for disc brakes | GT Alloy |
| Rims manufacturer | 28-hole Sun Metal MP-13 |
| Spoke nipples type | Brass Nipples |
| Spoke wheel | 2.0 (millimeters) Straight Gauge Steel |
Frame and Body Specs
| Frame materials | 6061 T6 Aluminum |
| Frame type | Welded Aluminum |
| Handlebar construction | GT BMX Mini |
| Handlebar extender | Not Available |
| Handlebar stem details | GT Mini Alloy |
| Headset size | 1 (inches) GT Pro Series |
Gearing Specifications
| Bicycle chain | 1/2 X 3/32 (inches) KMC |
| Bottom bracket shell width | Not Available |
| Bottom bracket type | Not Available |
| Crankset parts and sizes | 42 Teeth Sugino GT |
| Gear shift levers | Not Available |
| Rear gear set | 16 Teeth 1-speed |
Auburn JR-20RX Fork System Data
| Derailleur (Front) | Not Available |
| Derailleur (Rear) | Not Available |
| Fork material | Unicrown Crown Chromoly |
| Fork type | Auburn Mini |
Other Specs of Auburn JR-20RX
| Component group sets | Not Available |
| Pedals details | GT Alloy |
| Rear shock absorber | Not Available |
| Saddle seat | One-piece Nylon |
| Seat post extension | 20.6 (millimeters) Diameter Composite Integral To Saddle |
Mirraco UnderBoss
General Infos| Model | UnderBoss |
| Manufacturer | Mirraco |
| Year of production | 2008 |
| Current price | Check price Here ==> |
| Color choice |
- Deep Blue -Steel Gray |
| Sizes |
- Standard size for everyone |
Wheels And Breaking System
| Bike front tire | Rear: 20 X 1.95 (inches) CST Dirt Front: 20 X 2.125 (inches) CST Dirt |
| Bike rear tire | Not Available |
| Bike wheel size | 20 (inches) Wheels |
| Brakeset type | Tektro 289 Rear Levers Tektro U-brake Rear Brakes |
| Hubs for disc brakes | Rear: Coaster Brake Front: 3/8 (inches) Axle |
| Rims manufacturer | 36-hole Alex C-303 |
| Spoke nipples type | Not Available |
| Spoke wheel | 14ga. |
Frame and Body Specs
| Frame materials | Chromoly |
| Frame type | TIG-welded |
| Handlebar construction | Mirraco 2-piece |
| Handlebar extender | Optional |
| Handlebar stem details | M3 Alloy |
| Headset size | 1 1/8 (inches) VP A-71 |
Gearing Specifications
| Bicycle chain | KMC Z410 |
| Bottom bracket shell width | Not Available |
| Bottom bracket type | American |
| Crankset parts and sizes | 38 Teeth 152 (millimeters) 1-piece |
| Gear shift levers | Not Available |
| Rear gear set | 16 Teeth 1-speed |
Mirraco UnderBoss Fork System Data
| Derailleur (Front) | Not Available |
| Derailleur (Rear) | Not Available |
| Fork material | Unicrown Crown Chromoly |
| Fork type | Mirraco |
Other Specs of Mirraco UnderBoss
| Component group sets | BMX |
| Pedals details | Wellgo Resin |
| Rear shock absorber | Not Available |
| Saddle seat | M3 8 (millimeters) Rails |
| Seat post extension | 25.4 (millimeters) Diameter Steel |
Useful links and guides ....
- To know more about this exacte bike, Auburn provided us with the latest version of its JR-20RX bike manual
- Find All parts, tires and accessories of Auburn JR-20RX BMX here
- Get your Mirraco UnderBoss manual book version yo know further about this bike
- Saddles, tires And mechanical parts for Mirraco UnderBoss BMX here
