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.
Support 7-12 speed and 4/5/6mm spindle shaft rollers.Specification:Material: Ceramic and Aluminium alloyPulley Wheel Size(Diameter): approx. 72mm/2.83 inchPackage Includes:1 Piece Bike Rear Jockey Wheel2 Pieces Spindle Size Reducing Bushing (4m&5m)
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