FSA Gossamer ABS chainrings are designed to provide flawless shifting, with minimal weight and unmatched durability. FEATURES: Precision CNC machined AL7075/T6 alloy N-11 chainrings are compatible with all 10 speed drivetrains, and compatible with FSA, SRAM and Shimano 11- speed drivetrains Compatible only with FSA Gossamer ABS cranks (will not properly fit K-Force or SL-K cranksets) SPECS: Material: Aluminum Tooth Count: 34 Ring Position/Type: Inner Drivetrain Speeds: 10 , 11 Chainring BCD: 110 FSA ABS