I paid extra for tire installation because my cargo van is a 1 ton and new tires were rated up to 80 PSI. They used the lower grade valve stems anyway and my tires were only filled up just over 30 PSI. I paid the extra money they charged me for nothing. It wasn't only a safety hazard when I loaded the van up later that night and had low tires, but if a valve stem had failed I would've easily ruined my new tires or even wrecked the van while loaded!
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