Looks to me like AAA was right on everything. See, they have to have a cover-your-a$$ mentality, or else face liability when some moron misuses the data they provide or endorse. They cannot endorse anything that smacks of illegality either, and the drafting and coasting and rolling through stops are all illegal. Additionally, it has been my experience that tires do wear unevenly when way overinflated, and it seems the r.r. benefits of overinflation don't keep increasing along with increased pressure. I believe some overinflation is justified and good- up to and maybe even a little over sidewall max- but beyond that it just can't be something to tell the general public to do.
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