The SRAM SX Eagle Crankset includes Eagle platform styling and features, in an entry-level price point. SX Eagle cranks are compatible with all levels with SRAM Eagle drivetrain systems Offers the same chain retention performance as seen in all higher-level Eagle drivetrain cranks 32t direct mount X-SYNC 2 steel chainring included Aluminum crank arms 11 / 12 speed compatible Bottom bracket sold separately SRAM DUB technology creates a lighter, stiffer and stronger crankset Boost compatible 52.0mm chainline Pedal Spindle: 9/16" BB Included: No Chainring BCD: Direct Mount SRAM Crank Intended Use: Mountain Number of Chainrings: Chain Retaining Single Rings: 32 Drivetrain Speeds: 11, 12 Spindle Interface Type: SRAM DUB Chainline/Hub Compatibility: 141/148 Boost Hubs Color: Black