The Shimano BR-9000 R55C4 Cartridge Brake Shoes are replacement brake pads that are specifically designed for aluminum rims. The compound of the brake pads ensures great braking performance in both dry and wet conditions. The very good wear resistance is perfect for longevity and competition. Compatible for Shimano Dura Ace, Ultegra, and 105 brake calipers. Original Shimano parts guarantees that all components work perfectly for optimum performance and maximum safety and longevity.