Easton EC90 SL Carbon Crankset - 172.5mm Direct Mount CINCH Spindle Interface BLKEaston EC90 SL Carbon Crankset 172. 5mm Direct Mount CINCH Spindle Interface Black. The Easton EC90 SL crank utilizes CINCH technology which allows for direct mount 1x rings as well as direct mount 2x spiders and industry leading versatility. Easton refines the design for larger ring applications with improved chain retention while reducing running noise and friction. EC90 SL carbon arms feature hollow carbon construction while the 30mm spindle and