SRAM GX 1400 GXP Black X-SYNC 32T Crankset CNC machined 7075, two-tone anodized X-SYNC chainring--an integral component of the SRAM 1x drivetrain Open Core Technology (OCT) cranks are stiffer, stronger, and lightweight beyond any solid forged crankset. X-SYNC tall, square tooth design provides maximum chain control Sharp, narrow tooth profile and rounded chamfer edges help manage a deflected chain Mud-clearing recesses for the inner chain links and rollers