FSA Gossamer ABS 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. Compatible only with FSA Gossamer ABS cranks (will not properly fit K-Force or SL-K cranksets). Precision CNC machined AL7075/T6 alloy. Item Specifications: Chainring BCD: 110 FSA ABS, Color: Black, Defined Color: Black, Drivetrain Speeds: 10, Drivetrain Speeds: 11, Material: Aluminum, Ring Position/Type: Inner, Tooth Count: 32,