Doc's Diesel Premium E-Coated Wheel Hub Assemblies: Update your vehicle's performance and reliability with Doc's E-coated Hub Assemblies. Our hubs are E-coated, and they're designed to perform in the harshest conditions-from off-road adventures to heavy-duty hauling and extreme weather. These hub assemblies feature cutting-edge materials and construction enhancements, including inner wheel bearings, to keep you moving with confidence.