The Sram Eagle S100 crankset provides confidence with a robust aluminum crankset. Available in progressively shorter lengths, allowing you to build a bike without compromise. A sturdy steel X-Sync 2 chainring ensures the same chain retention performance as all other Eagle drivetrain cranksets.Main features:Aluminum crank arms with 3-bolt steel X-Sync 2 chainring for Eagle Drivetrain Ecosystem compatibility.Available in 175 mm, 170 mm, 165 mm, 160 mm, 155 mm lengths.Use 118/73 mm Powerspline bottom brackets.Features:Model: FC-S100-B1.Speed: 12-speed.BB compatibility: PowerSpline.Bottom bracket sold separately.Chainring size: 32T.Chainline: 52.0 mm.BB spindle interface: PowerSpline.Chainring material: Steel.Bolt Circle Diameter (BCD): Direct Mount (DM).Crank arm material: Aluminum.Chainring mount interface: Sram Direct Mount 3-Bolt.Chainring offset: 3 mm (Boost).Crankset type: MTB.Drivetrain configuration: 1x.Chain type: Eagle.References:00.6118.772.005: Sram Eagle S100 Crankset, FC-S100-B1, Boost 3 mm Offset, PowerSpline, 32T, 155 mm Crank.00.6118.772.006: Sram Eagle S100 Crankset, FC-S100-B1, Boost 3 mm Offset, PowerSpline, 32T, 160 mm Crank.00.6118.772.007: Sram Eagle S100 Crankset, FC-S100-B1, Boost 3 mm Offset, PowerSpline, 32T, 165 mm Crank.00.6118.772.008: Sram Eagle S100 Crankset, FC-S100-B1, Boost 3 mm Offset, PowerSpline, 32T, 170 mm Crank.00.6118.772.009: Sram Eagle S100 Crankset, FC-S100-B1, Boost 3 mm Offset, PowerSpline, 32T, 175 mm Crank.