Coated Shimano 11-speed 12 tooth Derailleur Pulleys

The CeramicSpeed Coated 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 with metal-coated races. For hazard warnings, safety and application information, please see CeramicSpeed Oil for Derailleur Pulleys. Technical Information: Application: Road, Triathlon & Time Trial, Cyclocross, Gravel, Cross Country, Enduro, All Mountain Compatibility: Shimano Teeth: 12 Gearing: 11-speed Material: aluminium Bearings: 607 ceramic Compatibility: Shimano Dura-Ace RD-R9100 Shimano Dura-Ace Di2 RD-R9150 Shimano Ultegra RD-R8000-SS/GS Shimano Ultegra Di2 RD-R8050-SS/GS Shimano Ultegra RX RD-RX800 Shimano Ultegra Di2 RX RD-RX805 Shimano GRX RD-RX810 Shimano GRX RD-RX812 Shimano GRX Di2 RD-RX815 Shimano GRX Di2 RD-RX812 Shimano XT RD-M8000 Shimano XT Di2 RD-M8050 Shimano XTR RD-M9000 Shimano XTR Di2 RD-M9050 Features: 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 balls ball bearing retainer made of reinforced polyamide, race made of hardened steel with polished channel additional metal-coated race for more performance and durability energy savings thanks to greatly reduced friction, higher top speed thanks to improved power transfer 12 teeth with Narrow-Wide profile to prevent chain slap and for full chain retention power smooth chain guidance on the derailleur pulleys without additional air resistance handmade in Denmark Technology: 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! Coated CeramicSpeed coated products offer the ultimate in performance and durability. This is achieved by a unique coating that increases the hardness of the races, so that in combination with the smoothness of CeramicSpeed ball bearings, there is virtually no bearing wear. The coating is a metal layer that is 75% harder than hardened steel. It is applied very thinly (0.003 mm) and evenly over the entire surface of the race and is used both internally and externally for optimum results. Manufacturer Number: black: 107995 Contents: 1 x CeramicSpeed Shimano 12 tooth Coated lower derailleur pulley 1 x CeramicSpeed Shimano 12 tooth Coated upper derailleur pulley 4 x Dura-Ace / XTR dust caps 4 x Ultegra / RX / GRX / XT dust caps 1 x CeramicSpeed oil 1 x sticker sheet