Shimano SM-RT64 Deore Centre-Lock disc brake rotor

From Shimano:

• Shimano SM-RT64 rotors offer secure and easy set-up with the proven Centre-Lock mounting system
• Precision cut stainless steel braking surface improves pad clearing in muddy conditions while aiding cooling underhigh load
• Rotor contact surface has been developed for excellent pad clearing and cooling which increases pad performance and life
• Alloy spider supports rotor surface, increasing rigidity and reducing weight
• Comes complete with steel lockring
• Average weight for 160 mm rotor with lockring is 153 grams