TRP-29 1 Piece 6-Bolt Slotted Rotor is designed for the most demanding riders in the most demanding conditions. Six recessed slots create channels to allow water, mud, and other debris trapped between the pad and rotor to escape during braking. When debris gets trapped between the pad and rotor braking power is dramatically reduced, these recessed slots maintain a more consistent brake feeling in mixed conditions. Six slots to remove water, mud, and debris Single piece design for weight savings SPECS Hub/Disc Compatibility: 6-Bolt Disc Rotor Size (mm): 160/180/203mm Rotor Type: One Piece Pad Compatibility: All Pad Compounds If your new rotors are a different size than the ones you&';re replacing, then you&';ll need new brake adapters! Check out our guide to getting the right brake adapters to spend less time on the computer and more on the trails.