What technology is in the bearings of wheels of cars/bicycles such that they are used in the rain without worrying about corrosion? Asking because everyone just told me skateboard/roller skate wheel bearings would rust if I skate in the rain, or just going through a puddle would ruin them.
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I am not familiar with all cars or wheel bearings, but I do have some experience, and can tell you that at least the ones I know about will absolutely rust, or really they will fail once they get slightly corroded. I used to have a 4wd, and was fa miler with 4 wheeling in mud and water areas, and I was also in the 4wd community. One of the big things that the people in this community that are serious about 4 wheeling do, is repacking their bearings after going out, if it involved going into deep water. For just normal driving, this is usually not a problem, because the bearings are completely packed in a heavy grease. If you drive your car in a flooded area or for any reason your wheels go deep enough for the bearings to go into water, you should absolutely have them repacked, or just replaced. As far as working on cars go, replacing or repacking bearings is not too hard.
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