Fits SRAM 8-bolt DM cranksets (Designed with Title CR1 Cranks) Machined from solid 7075 T6 Aluminum Compatible with SRAM T-Type 12-speed drivetrains only 30T = 64g 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;} Model CR1 T-Type Ring Type T-Type Mount 8-Bolt DM 3mm Offset Teeth 30 Oval/Round Round Color Chrome