Shimano Deore XT RT-MT800 Ice-Tech Freeza Centerlock brake rotor in its 160 mm variant with an external lockring.
Diameter: 160 mm.
Rotor Material: A three-layer sandwich construction consisting of stainless steel outer layers and an aluminum core.
Spider/Carrier Material: Aluminum.
Lockring Type: External serration (requires a standard bottom bracket tool for installation).
Mount Type: Center-Lock