• ludeth@kbin.social
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    1 year ago

    I don’t think valve stem caps keep air in. I think they simply stop dirt from getting into the valve stem which could cause it to become non functional or the valve to stick open on the tire to deflate

    • YAMAPIKARIYA@lemmyfi.com
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      1 year ago

      The ones with the rubber seals keep air in. A lot of new cars have those and a lot of cars with tire pressure sensors require them. Regular covers without the seal don’t keep air in obviously but I still wouldn’t trust the ones 3d printed by a random person because I don’t know what their QC is. The ones that go over original covers are the best either way.