OTR provides the highest quality heavy duty truck and trailer parts. With comprehensive research, independent testing, and continued product development, OTR heavy duty parts are sure to keep you and your truck safe while on and off the road.OTR has a wide selection of heavy duty truck parts, such as brakes and wheel end, steering and suspension, lubricants and filtration, lighting, power take off parts, batteries, starters, and more. OTR knows what it takes to repair and maintain Class 6-8 trucks, so they deliver solutions that make your job easier and more efficient.OTR warranties are comparable or better than OE and top brands. All heavy duty truck parts offer the same form, function, and fit as the OE replacement parts.