Description :
18T Aluminum alloy bicycle jockey wheel with fully sealed bearing .
Ceramics bearing , super lubricating , noiseless .
Positive and negative tooth guide wheel inhibit the horizontal chian swing effectively for accurate speed .
Apply for most mountain road bike folding bicycle rear derailleur of 18 teeth in the market .
- 12 speed and 4 / 5 / 6mm spindle shaft rollers .
Specification :
Material : Ceramic and Aluminium alloy
Pulley Wheel Size ( Diameter ): approx . 72mm / 2 . 83 inch
Package Includes :
1 Piece Bike Rear Jockey Wheel
2 Pieces Spindle Size Reducing Bushing ( 4m & amp ; 5m )