Narrow wide chainrings compatible with Race Face CINCH system cranks. Direct mounting allows an easy switch between rings and spiders.Compatible with 9 10 11 and 12-speed (excluding Shimano 12-speed chains)Narrow Wide tooth profiling ensures consistent chain retentionLockring installed/removed with ISIS BB toolStiff 4mm plate thickness to transfer loads without flexing TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Tooth Count 26 Drivetrain Speeds 12 Round or Oval Round Offset 3 Material Aluminum Defined Color Black Direct Mount Type Direct Mount CINCH