Ensure your semi is Ready for the Road Ahead™ with smooth front and rear brake performance, with the OTR 381mm x 81.53mm Brake Rotor. 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. Fashioned with precision standards to remove imperfections and provide long-term reliability. OTR understands what it takes to repair and maintain Class 6-8 trucks, so they deliver solutions, making your job easier and more efficient. OTR warranties are comparable to or better than OE and top brands. All heavy duty truck parts offer the same form, function, and fit as the OE replacement parts. FleetPride is your First Click in Heavy Duty®.