SRAM S300 GXP 165mm 48T Black Courier Crankset w/BB Includes GXP bottom bracket (English threads) One-piece forged 6061-T6 alloy arm/spider design 130mm BCD with 48t 7075-T6 anodized chainring (for 3/32" chains) Steel chainring bolts Capless CrMo M15 crank bolt