Trailer Hubs are the components used for connecting the trailer's wheels to its axle assembly. They help in providing support, rotational movement, and securing attachment for the trailer wheels. They consist of a central hub with bearing surfaces, onto which the trailer wheel is mounted, and a set of bearings that ensure smooth rotation of the wheel. Trailer Hubs may include features like grease seals to keep out contaminants and lubrication for the bearings. Trailer hubs are engineered using sturdy materials like cast iron or steel to withstand heavy loads and ensure durability. Properly maintained and installed trailer hubs contribute to the safe and reliable operation of trailers.