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Tire pressure (of winter tires)
Why is it that the usual maximum pressure indicated on the sidewall of a winter tire is 35 psi while an all season tire is 44 psi? If it is safe to up the pressure of an all season tire to 50 psi, is there any major structural difference in a winter tire that would forbid upping the pressure as high as an all season tire? Is it simply that above 35 psi the tire might not perform as good as it should on snow/ice?
I would really like to up the pressure even higher on the TDI which I use solely for low speed city driving. Especially since every 0.3 bar increase in tire pressure leads to a 7% reduction in tire rolling resistance.
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