The phrase "hub bearings" refers to the parts of a vehicle that help the wheels spin smoothly. They are located in the center of the wheel and allow it to rotate freely. Full definition
We have just serviced this truck, oil change, fuel filter, changed air filter, changed hub bearings, ball joints, alignment and proper inspection. (edmunds.com)
Japan - based NTN, a leading global supplier of hub bearings and driveshafts, will supply in - wheel motor technology to EV startup Changchun Fawsn Auto Tech (FSAT), established in October 2017 by FAW Group. (WWW.GREENCARCONGRESS.COM)