Race-Driven MudRat Brake Rotors. You will receive 4 brake rotors to replace the front and rear brakes on the following: 2022 2023 2024 2025 Can-Am Defender Max HD7. The MudRat Rotor is a solid rotor design which keeps mud and other abrasive materials from filling in the vent holes and prematurely wearing your brake pads. These rotors are designed to be used in 90% mud grade or higher. This new rotor design has been tested over numerous years in an effort to extend the life of brake pads in excessive mud and other abrasive conditions. We have found with numerous models, especially Can-Am Gen 2 models, the factory stock pads do not hold up while riding in mud with any type of vented rotors. If you are an aggressive mud rider this is the rotor for you. Race-Driven is committed to bringing the highest quality products to all riders at an affordable price. Customer Driven – Quality Driven – Race-Driven.