The OTR Wheel Hub is designed to provide superior performance and durability. This wheel hub assembly is constructed from high carbon alloy for maximum strength and durability. It is also coated with different materials to protect it from corrosion and rust. The pilot diameter of 8-3/4" is an important feature to consider when choosing a wheel hub assembly for your vehicle. This wheel hub assembly is designed to provide superior performance and durability. It is also easy to install and comes with all the necessary hardware for a quick and easy installation. FleetPride is your First Click in Heavy Duty®.