Two additional points
From my experience in the trucking industry, drums come balanced & unbalanced. A balanced wheel & tires combo on am unbalanced drum can be a problem to find.
Back in the mid '80 I had some of the new Michelin Pliots 70 series installed on my gas Pace arrow. After a few miles they went out of balance. I went back & had the rebalanced. Samething happened again so the called in the Michelin rep as these tires were new to the industry. As it turned out the installer was using too much lube & the tires were rotation on the rim.
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Gordon Hummel
1991 41.5' #266
8v92
2009 Pontiac Vibe GT Toad
Fulltime on the road
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