RaceFace Narrow Wide Chainrings feature tooth profiling for chain retention and a blend of weight and durability suitable for XC DH and everything in-between.7075-T6 aluminum aerospace grade strengthCompatible with 9 10 11 and 12 speedStiff 4mm plate thickness and I-beam construction transfer loads without flexingReversible laser etched graphics 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;} Ring Position/Type Chain Retaining Single Ring Tooth Count 32 Drivetrain Speeds 12 Chainring BCD 104 Color Black Defined Color Black Size 32T