FSA Super Road Chainrings are designed to provide flawless shifting, with minimal weight and unmatched durability. Precision CNC machined AL7075/T6 alloy. N-11 chainrings are compatible with all 10 speed drivetrains, and compatible with FSA, and 11 speed drivetrains. N-10 chainrings are compatible with , and Campagnolo Ultra Narrow 10-Speed drive trains. S9/C10 chainrings are compatible with 9 speed and Campagnolo C10 10-Speed. Compatible with all 10 speed drivetrains, compatible with and 11 speed drivetrains. Item Specifications: Color: Black, Material: Aluminum, Chainring BCD: 110, Defined Color: Black, Ring Position/TYPE: Outer, Drivetrain Speeds: 10, Tooth Count: 50,