Shimano rt64 deore centrelock disc rotorthe shimano rt64 disc rotor is a replacement disc brake rotor with centrelock mounting. Quick and easy fitment and compatible with both resin and metal disc pads.features precision cut stainless steel braking surface improves pad clearing in muddy conditions while aiding cooling under high 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 mount type centrelock brake compatibility shimano mechanical or hydraulic disc brakes pad compatibility resin or metal manufacturer's part no. sm rt64 weight 153g 160mm, 179g 180mm, 208g 203mma 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products.buy shimano components from chain reaction cycles, the world's largest online bike store.