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Shimano's RT81 rotors embody Shimano's signature Ice-Tech Technology. Ice-Tech produces 25% more braking power through achieving a high system stiffness and incredible cooling power. The 3 layer rotor features an aluminum core between stainless steel outer plates. This configuation quickly and efficiently dissipates heat from the exterior, drawing it away to cool into the atmosphere using the aluminum carriers and cutout winged design. With better heat dissipation, there is more consistent braking power.
