Oval profile maximizes the effective power stroke and helps reduce dead spots Engineered to work with T-Type and Non T-Type 10-12spd chains Precision CNC-machined in the UK from aerospace 7075-T6 aluminum Compatible with SRAM direct mount 8-bolt crankarms Weight: 51g (30t) 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 Model Oval SRAM 8-Bolt DM Ring Type Single (Anti-Chain Drop) Mount 8-Bolt DM 3mm Offset Teeth 32 Oval/Round Oval Color Black