I agree, especially if you have extensions on the wheel. It’s very common for them to leak. But even if you don’t have extensions I doubt that you’ll find anyone much interested in treating a 6 pound air loss as a warranty item. If it was mine I’d just put a few extra pounds in it and then air it up every 6 weeks or so. Of course, if it was mine I’d also spend the money to put actual dually valves on it and in doing so they will have to remove the tire from the wheel and then remount it and that almost certainly would fix it.
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