Allen C.wrote a review of Shimano XT SM-RT86 Rotor - 6-Bolt on July 17, 2013
Familiarity: I've used it several times
I am a big guy (6'2" 310lbs) and needless to say when I go DH riding I have always had issues with brake fade. These rotors are an amazing design (aluminum core with stainless steel faces). You get the great heat dissipation of aluminum and the durability of stainless steel. Given my size I am more concerned with performance than weight, but what also surprised me about these when I swapped out my old standard Stainless rotors was that they weigh about half as much. Excellent product. My only complaint is tht the next level up of the ICE series only comes in a Shimano spline configuration and not the industry standard 6 bolt. That one adds aluminum cooling fins to further dissipate the heat. This is a great idea that really works.