The Shimano RT-MT900 XTR disc rotor features Ice Tech technology, providing consistent braking performance through energy control. The stainless steel/alloy 3-layer sandwich construction manages heat while riding, allowing the clad steel/alloy/steel rotor to radiate heat quickly through the aluminum core. This results in a surface temperature drop of around 50 degrees Celsius. When used with Ice Tech pads, surface temperatures can drop from around 400 to 300 degrees Celsius, providing improved performance. The FREEZA rotors allow the alloy core to extend out from the braking surface as a fin, providing added cooling. Ice Tech rotors achieve long pad life, less noise, and less fade due to improved heat dispersion. The rotors are durable, lightweight, and rigid, using the Shimano Center Lock system for increased strength and security with an easy setup. The precision-cut braking surface improves pad clearing in muddy conditions and aids cooling under high load.