Quote:
Originally Posted by SDMCF
Another point worth mentioning is that tire pressures are more important in winter. In summer we (aiming for economy) rarely if ever approach the traction limit of our tires and can over-inflate the tires without serious consequences. This is not true in winter. Generally I run much lower pressures in winter and if necessary drop them very low (maybe 10 psi) to get traction where others get stuck.
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Tirerack.com did some tests a few years back with tire pressure and traction on snow, they found that with low pressure they lost traction and recommended full pressure.
My snow tires have a 51psi sidewall rating and I keep them at that pressure.