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CNC Pulley Rear Derailleur 12/14T Wheel Si3N4 Ceramic Bearings Lightweight Design Improved Speed Change Performance

<ul><li>【Lightweight and for durable】Designed with a lightweight construction, the MTB Road Bike Ceramic Bearing CNC Pulley Rear Derailleur 12/14T Wheel weighs only 8g for the 12T model and 14g for the 14T model. This ensures a lightweight riding experience without compromising on durability.</li><li>【Si3N4 Ceramic Bearings】Equipped with Si3N4 ceramic bearings, these wheels are highly resistant to deformation, cold and high temperatures, wear, and . The ceramic bearings offer high transmission efficiency, allowing for a more labor-saving riding experience.</li><li>【Extended Service Life】The design of Si3N4 ceramic bearings reduces the centrifugal effect of the outer ring by 40% when rotating, significantly extending the service life of the wheels.</li><li>【Improved Speed Change Performance】Featuring a wide and narrow tooth profile, these wheels fit more closely and reduce gaps, resulting in shorter speed change response time and improved speed change performance. The deepened tooth marks also minimize chain loss, while the optimized inclined tooth shape ensures smooth chain entry and release.</li><li>【 Compatibility】Made of for durable aluminum alloy material, these wheels are compatible with various transmission systems, including 8/9/10/11-speed models. They are suitable for MTB, Road Bike, and other similar bicycles.</li></ul>

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Feature:* Road Bike Ceramic Bearing CNC Pulley Rear Derailleur 12/14T Wheel&nbsp;*light design, 12T only 12.8g, 14T only 14g*Si3N4 ceramic bearings are not easily deformed by force, and are resistant to cold and high temperature, wear and resistance, high transmission efficiency, and more labor-saving riding*Si3N4 ceramic bearings Design,When rotating, the centrifugal effect of the outer ring can be reduced by 40%, and the service life is greatly extended*The wide and narrow tooth profile fits more closely and reduces the gap, which can shorten the speed change response time and improve the speed change performance to a certain extent.*Deepen the tooth marks to reduce the chain loss, optimize the inclined tooth shape, and synchronize with the chain transmission direction, so that the chain entry and chain release are smooth*Made of high quality aluminum alloy material, and practical to useSpecification:*Material: Aluminum alloy + ceramic*Opt Color: Black,Red, Gold(As Pictures Show)*Opt Type: 12T/14T*Size: 50*50mm (12T)/57*57mm(14T)*Weight: About 12.8g (12T)/ 14g (14T)*Applicable screw aperture: 4/5/6mm*Applicable transmission : 8/9/10/11 speed*Compatible: for ,Road Bike etc.&nbsp;Package Includes:1 x Rear Derailleur Pulley2 x AdapterNote:1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.