Prepare your semi to be Ready for the Road Ahead™, with the Meritor 1.61" U-Type Air Disc Brake Rotor that offers smooth front and rear brake performance. Once the brake pedal is engaged, this replacement rotor works with the brake pads and caliper to create a compression mechanism that slows the vehicle. Built with precision standards to remove defects and provide long-term durability. FleetPride is your First Click in Heavy Duty®.