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Bike Rear Derailleur Roller, Metal Bearing Deep Tooth Ceramic Ball Bicycle Rear Derailleur Wheel  For Mountain Bike Gold

<ul><li>Improve Lubrication: Bearing adopts ceramic pelleting process, which greatly reduces the friction strength and improves the lubrication performance of the self lubricating system, improving the riding experience.</li><li>Effort Saving: Ceramic ball has self lubricating and maintenance free characteristics, provides silky smoothing rotation and higher transmission efficiency, effective save effort when riding.</li><li>High Compatibility: Reducer sleeve has good compatibility, riding without clamping chain, which is suitable for 8, 9, 10, 11 speed rear derailleur, installation shaft diameter compatible with 4mm, 5mm, 6mm.</li><li>Deep Tooth Design: Bicycle rear derailleur with deep tooth to reduce the chain off, provide stable chain to easily change speed, give you a satisfying using experience.</li><li>Metal Ceramic: Bike rear derailleur roller made of high quality metal ceramic material, with high strength and wear resistance, which has good performance for long service life.</li></ul>

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Specification: Item Type: Bicycle Rear Derailleur Pulley Material: Metal Ceramic Diameter: Approx. 5cm / 1.97in Package List: 1 x Guide Wheel2 x Reduction Sleeve