The SRAM SX Eagle Crankset includes Eagle platform styling and features at an entry-level price point. SX Eagle cranks are compatible with all levels of SRAM Eagle drivetrain systems. Details: Series: SX Eagle Speeds: 11-speed, 12-speed, Number of chainrings: 1 Chainring material: Steel Crankarm material: Aluminum BCD: Direct mount Bottom bracket not included SX Eagle DUB Crankset - Non-Boost (142mm) Chainline: 49.0mm Hub: 135/142mm Chainring teeth: 32 SX Eagle DUB Crankset - Boost (148mm) Chainline: 52.0mm Hub: 141/148mm Chainring teeth: 32 Compatibility: Chain: SRAM Eagle 12-speed chains, SRAM 11-speed chains Bottom Bracket: SRAM DUB bottom brackets Pedal: All 9/16" pedals