Simply put, a bearing is a collection of metallic (usually steel) balls held together by a ring known as the race. This goes on the inner part of the wheel to help it spin smoothly around the axle.
Their “job” is to decrease friction upon rotation. Should a wheel have just been spinning around the axle with nothing to act as a friction-decreasing agent, either or both parts would wear out much faster and cause damage to your vehicle.
Wheel bearings exist on all sorts of vehicles today, including cars, bicycles, and (of course) trailers.
This month we’ll be sharing more information about bearings, so stay tuned!