Why does it seem like wheel bearings on trailers need constant maintenance, but the ones in our cars don’t?

Question

For example, I know a couple people with trailers and they all talk about regreasing their wheel bearings and removing them from the trailer on a somewhat set schedule in one way or another, but I’ve never heard of that being done on a car.

What is the difference? Are trailer wheel bearings just made poorly?

In: 2

Answer 1

It’s been decades since you could service a car’s wheel bearings. They aren’t serviceable now. They do wear out but are much better quality than a typical trailer.