- Shimano SMRT64 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 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 - Average weight for 160mm rotor with lockring is 153 grams

- XT SMRT78 rotors are both high performance and lightweight, using the proven Shimano Centre-Lock system giving increased strength and security with an easy set-up - Precision cut and drilled heat treated stainless steel braking surface improves pad clearing in muddy conditions while aiding cooling under high load - Large 5-arm alloy spider is a highly rigid and lightweight support for the rotor surface - Super polished braking surface gives excellent braking performance