The Easton EC90 SL Carbon Crankarms are built around proven Race Face CINCH® technology, giving riders the freedom to run either a direct-mount 1x chainring or a 2x spider setup. This adaptable platform makes it easy to fine-tune gearing for different riding styles, races, or terrain without replacing the entire crankset. While 1x drivetrains are valued for their low weight and mechanical simplicity, riders often sacrifice flexibility when gearing needs change. The EC90 SL addresses that challenge with a highly versatile design that allows quick drivetrain configuration changes. Easton also optimized the crank for larger chainring applications, enhancing chain retention while helping reduce drivetrain noise and friction. Crankarms and spindle are included, while chainrings and the bottom bracket are sold separately.