i don't want to bust your chops here, but what i was trying to say from the getgo is: if you drive alot, especially on crappy roads, its a good idea to take your car (assuming you can't or don't want to diy) to the shop to get the alignment and suspension checked and fixed if needed once a year. the shop will put it on the machine and check it all out. if its fine= no prob, no charge. if its out of spec or needs repairing, they will tell you and fix it if you want them to. the purpose of this i thought was obvious, it will avoid tires like what started this thread, and all the other benefits of having the suspension right and tight. does this not make sense?

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1984 300TD "MAX" 303K+ still going...
fast '70 Chevelle 200k+
home built Shovelhead chopper