These Wolf Tooth direct mount rings are designed for SRAM cranks with 8-bolt mounting and are specifically optimized for use with Shimano Hyperglide+ 12-speed chains and drivetrains. This chainring is equipped with the patented Drop-Stop ST asymmetrical tooth design that provides the best in wear life mud clearance and chain retention. Includes set of (8) custom T20 stainless steel bolts for mounting. 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 ul{font-size:24px;font-weight:600;margin-left:-25px;padding-top:35px;border-top:3px solid #f0f0f0;}.desc li{list-style:none;border-bottom:4px solid #eb212e;width:142px;} TECH SPECS Tooth Count 36 Drivetrain Speeds 12 Round or Oval Round Offset 6 Material Aluminum Color Black Weight 77 Defined Color Black Direct Mount Type Direct Mount SRAM 8-Bolt