Shimano Centre Lock Rotors SM-RT64 203mm. SLX: The Shimano SM-RT64 disc brake rotors offer secure and easy set-up using the proven Centre-Lock system. These brake discs are ideally suited to Shimano SLX and Deore disc brake systems. They have a precision cut stainless steel braking surface which improves pad clearing in muddy conditions while aiding cooling under high load, increasing pad performance and life. The alloy spider supports the rotor surface, increasing rigidity and reducing weight. Available in a range of sizes to suit all riding styles and braking requirements, please select from options. All rotor sizes come complete with steel lockring. Average weight for 160 mm rotor with lockring is 153 grams. NB: Image for illustration purposes only – supplied as single rotor only.