FSA Super Road Chainrings are designed to provide flawless shifting, with minimal weight and unmatched durability. 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. Precision CNC machined AL7075/T6 alloy. Item Specifications: Tooth Count: 34, Ring Position/Type: Inner, Drivetrain Speeds: 11, Chainring BCD: 110 FSA ABS, Color: Black, Defined Color: Black, Material: Aluminum,