Shimano's Ice Tech technology applied to the SM-RT70 rotor allows for excellent heat dissipation and prevents brake fade. The rotor is constructed with a layer of steel and aluminium for efficient heat management. It features the proven Shimano Center Lock system for excellent rigidity, security, and easy setup. The clad steel/alloy/steel rotor construction radiates heat quickly through the aluminum core, reducing surface temperatures by approximately 50°C. When paired with Ice Tech pads, surface temperatures can drop from around 400°C to 300°C, significantly improving overall performance, leading to longer pad life, reduced noise, and less fading. This rotor has a 3-layer sandwich construction of stainless steel, aluminum, and stainless steel for stable stopping performance. Includes lockring. Steel and alloy construction. Centrelock fitment.