Valve extenders are not made for tires, they are made for valve stems and those are all the same size thread and such so they are universal.
They do, however, have a tendency to leak especially if not properly tightened. Also, sometimes they do not check the nut that holds the valve stem to the rim, those leak too.
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1978 39 FT. Newell Classic
Jeff & Leann Shackly
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