Or as low as 
Shimano XT SM- RT81 Ice-Tec Centrelock Rotor
- Ice-Tec rotors achieve long pad life, less noise and less fade due to improved heat dispersion
- Using the proven Shimano Centre-Lock system for excellent rigidity and security with an easy set-up
- Rotor contact surface has been developed for excellent pad clearing and cooling which increases pad performance and life
- Large forged alloy spider supports rotor surface, increasing rigidity and reducing weight
- Comes complete with alloy lockring
