Pulleys with NOVA ceramic bearings to improve drivetrain smoothness, allowing power gains to satisfy the most demanding. Weigh about 23 grams per pair. Designed with the highest quality materials: 7075 aluminum and all-ceramic bearings (rings and balls). 11T aluminum pulleys, which coupled with ceramic bearings reduce the angle of chain winding with minimal friction Compatible with Shimano 105 / Shimano / Dura-Ace 11V groupset - Sram -ETAP-FORCE-RED-AXS 11V Not compatible with Shimano 12-speed because the new chain has too narrow links....
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