A tougher version of our EBC ATV and Motocross Rotors is now available! The higher carbon steel disc s are heat treated and surface ground to produce a rotor capable of withstanding the torturous conditions of Off Road use and can be used with any type of pads. With the variety of OEM and aftermarket pad materials having a great range of abrasive effect on rotors, a manufacturer has to devise brake rotors that will stand up to anything that the market can throw at them! That s what we have done with our NEW hardened and tempered heat-treated carbon steel rotors from EBC Brakes. They are available for all popular ATV applications, including Polaris rotors, which are NOT fitted with hardened rotors as standard equipped. (Also available for most current Motocross two wheelers as well). Note: Plain edged rotor will allow fitment of optional speedo pick up. 2 for 6x6 model 4 rear discs required 2 sets required.