The Shimano RT-CL900 disc brake rotor provides quiet and consistent braking control for any terrain.Consistent braking performance on any long steep descent thanks to excellent heat dissipationRobust arm shape for quiet operation without sacrificing weight or heat dissipationHeat dissipation paint boosts performance 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;} Rotor Size (mm) 180 Rotor Type Two Piece Pad Compatibility All Pad Compounds keyword search Dura-Ace Hub/Disc Compatibility Center-Lock