6 bolt rotors include bolts
6 bolt are interchangeable with all Shimano disc brakes as long as the hubs and rotor size match the caliper
Ice Tech brake rotors (RT-98; RT-81; RT-67) feature an aluminum core clad with stainless steel braking surfaces. The innovative design sheds weight, dissipate heat and dramatically improves overall performance
Freeza Technology (RT-99) features 3-layer structure with aluminum core and stainless steel outer layers and additional aluminum cooling fins reduces rotor surface temperature approximately 150 degrees Celsius compared to all-steel rotors