Wolf Tooth PowerTrac Elliptical direct mount rings use their proprietary PowerTrac design that has all the benefits of oval but without the funky uneven pedal stroke. These chainrings 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 34 Drivetrain Speeds 12 Round or Oval Oval Offset 3 Material Aluminum Color Black Weight 69 Defined Color Black Direct Mount Type Direct Mount SRAM 8-Bolt