Profile: Tractor-Trailer Supply Co., Inc. manufactures truck and trailers parts. Our products include air brake valves & compressors, axles, bearings & seals, belts, hoses, brake drums, brake parts and accessories. Our services include brake drum, rotor turning, fly wheel resurfacing, torque arms rebushed and drive line services. We offer slack adjusters, spring brakes, water pumps, tire and wheel accessories.