FSA Pro Road Chainrings deliver flawless shifting for any road drive train. S9/C10 chainrings are compatible with 9 speed and Campagnolo C10 10-Speed. N-11 chainrings are compatible with all 10 speed drivetrains, and compatible with FSA, SRAM and 11 speed drivetrains. Precision CNC machined AL7075/T6 alloy. N-10 chainrings are compatible with , SRAM and Campagnolo Ultra Narrow 10-Speed drive trains. Compatible with all 10 speed drivetrains, compatible with SRAM and 11 speed drivetrains.