X Series Carbon Brake Pads For several years now this successful carbon graphite formula has been the choice of top enduro and moto-x riders for certain conditions around the world. The man advantage of this type of material is its lack of heat generation or conduction, which keeps both the rotor and caliper cool. Top Enduro and Hare Scrambles USA riders prefer this material for fast and dry riding conditions. The material is also very useable for standard sport ATV useage. Also TUV tested and KBA approved for street use on enduro bikes.