FSA Super Road Chainrings are designed to provide flawless shifting, with minimal weight and unmatched durability. FEATURES: Precision CNC machined AL7075/T6 alloy Shifting ramps and stainless steel pins on outer rings N-11 chainrings are compatible with all 10 speed drivetrains, and compatible with FSA, SRAM and Shimano 11- speed drivetrains SPECS: Tooth Count: 53 Ring Position/Type: Outer Drivetrain Speeds: 11 , 10 Defined Color: Black Chainring BCD: 130