The CERAMICSPEED Shimano 10/11s Ultegra/Dura Ace Pulleys Red are high-performance spare parts designed to improve the transmission efficiency and durability of your bike. These pulleys are specifically designed for Shimano Ultegra and Dura Ace 10 and 11-speed derailleurs, ensuring perfect compatibility and optimized performance.Featuring high-quality ceramic bearings with a lifetime warranty, these pulleys reduce friction and wear on your drivetrain, resulting in smoother and faster shifting. The pulleys are made from aircraft-grade aluminum and coated with a unique red finish, giving your bike a touch of style and personality.Whether you're a competitive cyclist or a casual rider, the CERAMICSPEED Shimano 10/11s Ultegra/Dura Ace Pulleys Red is a must-have upgrade that will significantly enhance your bike's performance and aesthetics.