FSA Pro Road Chainring Material: 7075-T6 aluminum Teeth: 110 BCD 36 t, 110 BCD 46 t, 110 BCD 50 t, 110 BCD 52 t, 130 BCD 39 t, 130 BCD 53 t Bolt Circle Diameter: 110 - 130 mm Compatible Components: Shimano 11 & 10-spd, SRAM 11 & 10-spd Recommended Use: cycling