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Dumb question, but wouldn't overinflating your tires also affect the accuracy of the speedometer, the odometer, and also the reliability of the gps unit when you are out of range (ie, in a tunnel or under a long overpass?)
Minimal impact if any. If you think about it, other factors such as thread height impact more. New tread is at 10/32" or 11/32 ", legal minimum 2/32".
The link also explains why not to use maximum tire pressure.
Again I know tradeoffs and set my tire pressure accordingly. The tread started with the question "what everyone else uses", he did not ask for what Lexus recommends. Again, Lexus' recomendation are tradeoff for an average driver that does not exists and for an OEM tire that I am not replacing with. At the end of the day, you can set whatever pressure you wants.