Full Speed Ahead Gradient Modular 1x Crankset - 170mm Fits Shimano SRAM 11/12-Speed Drivetrains 30mm BB392EVO Spindle BLKFull Speed Ahead Gradient Modular 1x Crankset 170mm Fits Shimano and SRAM 11 12 Speed Drivetrains 30mm BB392EVO Spindle Black. The redesigned Full Speed Ahead Gradient Modular 1x crankset features hollow aluminum crankarms manufactured using an innovative CNC machining process that results in a dramatically reduced weight increased stiffness and a 40% increase in strength. Combining cutting edge materials precision engineering and athlete insights the