CERAMICSPEED Shimano 11-speed 12 Tooth Derailleur Pulleys

The CeramicSpeed derailleur pulleys for Shimano 11-speed have 12 teeth with a narrow-wide design to prevent chain slap and feature smooth, heavy-duty ceramic bearings.
Technical Information:Application:Road, Triathlon & Time Trial, Cyclocross, Gravel, Cross Country, Enduro, All MountainCompatibility:ShimanoTeeth:12Gearing:11-speedMaterial:aluminiumBearings:607 ceramicCompatibility:Shimano Dura-Ace RD-R9100Shimano Dura-Ace Di2 RD-R9150Shimano Ultegra RD-R8000-SS/GSShimano Ultegra Di2 RD-R8050-SS/GSShimano Ultegra RX RD-RX800Shimano Ultegra Di2 RX RD-RX805Shimano GRX RD-RX810Shimano GRX RD-RX812Shimano GRX Di2 RD-RX815Shimano GRX Di2 RD-RX812Shimano XT RD-M8000Shimano XT Di2 RD-M8050Shimano XTR RD-M9000Shimano XTR Di2 RD-M9050Features:high-performance bearings with special ceramic balls made of grade 3 silicon nitride (best achievable degree for ceramic bearings)CeramicSpeed bearing balls: 15% harder, 100% smoother and 99% more resilient than commercially available ceramic ballsball bearing retainer made of reinforced polyamide, race made of hardened steel with polished channelenergy savings thanks to greatly reduced friction, higher top speed thanks to improved power transfer12 teeth with Narrow-Wide profile to prevent chain slap and for full chain retention powersmooth chain guidance on the derailleur pulleys without additional air resistancehandmade in DenmarkTechnology:Ceramic Bearings by CeramicSpeed
CeramicSpeed ceramic balls are rounder, harder, smoother, lighter and more resilient than steel balls and ceramic balls from other manufacturers. CeramicSpeed ceramic bearings therefore last 3 to 5 times longer than other commercially available bearings. All CeramicSpeed bearings are manufactured by hand in Denmark under clean room conditions and are subject to a strict four-stage control procedure. Among other things, the size of the ceramic balls is checked down to the thousandth of a millimetre. Tests are then carried out in the laboratory or preferably by professionals in training and competition. CeramicSpeed bottom brackets guarantee you the lowest possible friction, optimised power transfer and maximum durability and also help you save watts and reach the finish line faster. It’s not about seconds, it’s about minutes!
Manufacturer Number:black:107340Contents:1 x CeramicSpeed Shimano 12 tooth lower derailleur pulley1 x CeramicSpeed Shimano 12 tooth upper derailleur pulley4 x Dura-Ace / XTR dust caps4 x Ultegra / RX / GRX / XT dust caps1 x CeramicSpeed oil1 x sticker sheet