The MD series of EBC Moto X rotors fall into two groups. These are full circle profile rotors which are direct size and shape equivalents to OEM parts and the lighter Contoured profile C series rotors. Both designs are made with heat treated carbon steel which is back tempered after hardening to an optimum hardness and toughness to provide durability but not to become brittle.

Over hardened rotors can crack when heavy braking occurs and the rotors is quickly cooled such as when crossing water.

Always use new pads when replacing rotors, the use of old or worn pads can cause hot spots or glazing of the rotor and will promote brake fade and loss of brake.