The Sram GX Eagle 12 Speed 32T Chainsetdelivers consistent performance every time out. Featuring SRAM’s X-SYNC™2 tooth profile chainring, the GX crankset is engineered for complete chain control. Each tooth’s thickness is precisely toleranced and controlled to work seamlessly with the chain’s inner and outer links. Sram GX Eagle 12 Speed 32T ChainsetFeatures Arm material: Optimized 7000 series forged aluminum arms Chainring material: Aluminum Weight: 610g - 662g Available arm lengths: 165mm, 170mm, 175mm Compatibility: All levels of eagle™ drivetrain systems Colors: Black Bolts: Direct mount (dm) Bottom Bracket: bb30/pf30-68/73mm, gxp 100mm/pf gxp 121mm, gxp/pf gxp 68/73mm Chainrings: 30, 32, 34 Recommended Chain: GX Eagle™ Interface: 24mm, 30mm Other Chainline: 49.0mm, 52.0mm, 66.5mm, 76.5mm