Upgrading your brakes?  Be sure to consider these Shimano XT SM-RT86 Ice-Tech rotors.
Ice-Tech is Shimano's approach to high-performance braking by reducing operating temperatures.  Ice-Tech rotors are a two-piece floating design for increased stiffness and they feature a 3-layer construction.  There's an aluminium core sandwiched between two stainless steel outer layers.  Aluminium dissipates heat quickly which works perfectly for braking.  When combined with Shimano brakes and Ice-Tech pads, riders will notice consistent performance, reduced brake fade and less brake noise. 
Specifications:
- Model No - SM-RT86
- Series - SHIMANO DEORE XT M8000 Series
- Average weight 154.0 g (180 mm)
- Remarks - With anti loosen tightening plate
- Ice technology - ‚úî
- 6-bolt (P.C.D. 44mm) - ‚úî
- Alloy lock ring - ‚úî
- Outside diameter_160mm - ‚úî
- Outside diameter_180mm - ‚úî
- Outside diameter_203mm - ‚úî
- Outside Diameter 203 mm, 180 mm, 160 mm
- Pad compatibility_Metal - ‚úî
- Pad compatibility_Resin - ‚úî
- Pad Compatibility - Metal, Resin