Oval rings help the rider to spin smoother and more efficiently Example: 32t is equivalent to 30t at dead spot and 34t at the power zone Fits Race Face cranks with the Cinch system and provides 3mm offset for Boost spaced bikes Narrow-wide tooth profile keeps the chain snug, allowing you to leave the chain guide behind Not for Shimano 12spd Hyperglide+ chain Designed in UK, manufactured in Poland 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 Oval Cinch DM Ring Type Single (Anti-Chain Drop) Mount Cinch DM 3mm Offset Teeth 34 Oval/Round Oval Color Gold Size 34T Offset Boost