SunRace FCR9 F & A Road cranksets Aluminum Crank ArmsWeight: FCR9A 699g / FCR9F 602g*Technology: Super Fluid Drive*Square Taper Interface*Aluminum Chainrings*Chainrings: FCR9A 53-39T / FCR9F 50-34T*BCD: FCR9A 130mm / FCR9F 110mm*Aluminum Crank Arms*Crank Arm Length: 172.5 or 170mm*Weight: FCR9A 699g / FCR9F 602g