TRP's two piece rotors offer superior heat dissipation due to the aluminium center as well as excellent stiffness to provide you with confidence in your braking. Six recessed slots create channels to allow water, mud, and other debris trapped between the pad and rotor to escape during braking. Upgrade the stopping power and heat dissipation by increasing the size of your rotor giving you more surface area and leverage. SPECIFICATIONS - Sizes: 140mm, 160mm, 180mm, and 203mm - Colors: Black Center - Compatible with Centerlock hubs - Does not include lock-ring