Convertible spider design for different chainring and chainline configurationsThick thin tooth design for maximum chain engagementDirect mount, forged then CNC machined AL7075 chainringHollow forged AL7050 crank armsFits Shimano and SRAM 11-12 speed system30mm chromoly spindle170x32392EVOBLKDirect Mount695g1x11/12UPC/EAN/GTIN: 840031052759