Wheels turning at 800 revolutions per mile can generate a lot of friction and heat. Roller-type or ball bearings packed in grease inside all four wheel hubs allow wheels to spin freely without ...

Wheels turning at 800 revolutions per mile can generate a lot of friction and heat. Roller-type or ball bearings packed in grease inside all four wheel hubs allow wheels to spin freely without ...

On modern front- and four-wheel drive cars, wheel bearings are a set of permanently sealed, precisely machined steel ball or ...