wheelhub

Wheelhub, commonly written as wheel hub, refers to the central component of a wheel assembly that connects the wheel to the axle and enables rotation. It transmits torque from the drive train to the wheel while supporting the wheel’s weight and maintaining alignment. In automotive contexts, the hub sits on a bearing assembly and carries the wheel studs or bolts that secure the wheel. In bicycles, the term refers to the hub at the center of the wheel that houses bearings and the axle, with variations for different frame and axle standards.

Design and features vary by application. Front hubs typically accommodate steering and may integrate spoke interfaces, while rear hubs may include a freehub mechanism or cassette interface for bicycles. Automotive hubs commonly attach brake rotors to a flange on the hub and may incorporate an anti-lock braking system (ABS) tone ring or sensor. Wheel studs or bolts provide the attachment point for the wheel itself. Hubs are made from steel or aluminum alloys and use sealed cartridge or tapered roller bearings to minimize friction and wear. Materials and tolerances are chosen to meet load, thermal, and durability requirements.

Maintenance and safety considerations are central to hub performance. Regular inspection focuses on bearing play, seal condition, and corrosion. Common service tasks include replacing worn bearings or seals, cleaning and re-lubricating as appropriate, and ensuring proper torque and installation of fasteners. In modern vehicles, hub assemblies can be integrated with sensors or braking components, making correct installation and alignment critical for braking performance, steering feel, and overall safety.