Shimano XT RT86 Ice-Tech 6-Bolt Disc Brake Rotor Shimano XT Ice Tec Rotors SM-RT86, 6 bolt fitting in 160mm, 180mm & 203mm SM-RT86 Ice-Tec rotor gives excellent performance made from a stainless steel / alloy 3-layer sandwich construction that manages heat while riding The clad steel / alloy / steel rotor construction allows heat generated from braking to radiate quickly through the aluminium core achieving surface temperature drops of around 50 deg C. When used with Ice-Tec pads surface temperatures can drop from around 400 to 300 deg C, this provides great improvements in performance all round Ice-Tec rotor achieves long pad life, less noise and less fade due to improved heat dispersion 6-bolt mounting system – Not Included Rotor contact surface has been developed for excellent pad c