12T MTB Road Bike Rear Derailleur Ceramic Bearing Pulley Wide Narrow Tooth Bicycle Guide Wheel For Shimano Sram

MEIJUNName:12T positive and negative tooth ceramic guide wheelStructure: Ceramic PalinWeight: about 11gInstallation size: 6mm/5mm/4mm axisSize: diameter of about 48mmMaterial: AL7075 aluminum alloy cnc processing / ceramic PalinAdvantages: 1, most of the market after the dial, support 7/8/9/10 speed,2, the tooth shape is a thick one thin, easy to fill the chain gap to reduce the amount of chain ore to speed up the shift, while the single disk system Can reduce the chance of dropped chains.3 flexible rotation, smooth and silent

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