The two-piece rotors from TRP offer excellent heat dissipation due to the aluminum core, as well as outstanding stiffness. These rotors give you complete confidence in your brakes and maintain a lightweight design even in sizes 180/203 mm. The two-piece rotor is now combined with TRP's new slotted rotor. Six recessed slots create channels that allow water, mud, and other contaminants trapped between the pad and rotor to escape during braking. When foreign objects get wedged between the brake pad and rotor, drastically reducing braking performance, these recessed slots provide a more consistent braking feel even under mixed conditions.