The Shimano Deore XT SM-CRM85 chainring is designed for use with Shimano&';s M8100 and M8130 1x cranksets.Special MTB gear tooth profile with Dynamic Chain Engagement+ improves chain engagement and retention 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 34 Drivetrain Speeds 12 Round or Oval Round Color Black Defined Color Black Direct Mount Type Direct Mount Shimano Chainring Size 34T