What would you say is a safe figure increase? I can see the "max psi" on my tyre walls, but it does say "US ONLY", whether thats because the mainly straight roads have little impact on tyre wear, or because saftey regs are stricter here im not sure. But im willing to try a small increase.
There is a safety margin in the max side wall numbers. Some of the more extreme hypermilers exceed it. Unless there is many nasty pot holes in your roads, that should be a fine point to start.
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