Comprising of a hollow crank arm built from a 6000 series aluminium & a CNC-machined chainring, this durable & lightweight chainset is designed to withstand the powerful pedalling & pressures associated with hard & aggressive MTB riding. The chainring features SRAM's X-SYNC tooth profile, equipped with tall, square teeth edges for optimum engagement with your chain's links to give a firm mid-ride hold & smooth movement from ring to ring. Technologies: GXP: GXP’s Gutter Seal design cuts friction & weight—improving both feel & performance. X-SYNC: SRAM X-SYNC 1X chainrings provide the highest level of performance & durability. The SRAM X-SYNC tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp & narrow tooth profile, as well as rounded chamfered edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chainrings have been designed with mud-clearing recesses for the inner chain links & rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1X drivetrain.