STEMS LEAK AFTER A FEW YEARS AND DRIVE YOU NUTSTHINKING IT'S THE TIRE LEAKING. SOMETIMES A NEW STEMWILL WORK AND TAKE CARE OF THE LEAK. MAKE SURE TO BREAKBEAD ON STEM SIDE AND LIGHTLY SAND WITH FINE PAPER AND CLEANGOOD AND RUBBER LUBE STEM AND TIRE AND OVER FILL TILL TIRE POPSAND STOP , CHECK PRESSURE AND ADD OR DEFLATE TIL PROPER AMOUNTIS REACHED.
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