Modular super light weight aluminium crankPrecision CNC machined into two pieces, the hollowed out halves feature a series of three main ridges and grooves down the outside of each arm that form a tightly interlocking single pieceForged and precision CNC machining with advanced bonding technologyManufacturing process dramatically reduces weight while increasing stiffnessIdeal option for riders seeking a professional level cranksetAL7075 100% CNC chainringsFits Shimano and SRAM 11-12 speed system175x30392EVOBlackDirect Mount520g1x11/12UPC/EAN/GTIN: 840031066299