[brucepick]

Lower tire pressure will cause blowout. Sidewall flexes too much and is weakened. I saw it happen on a family member's car. Owner never paid any attention to tire pressure and one blew out the sidewall. Checked the others and they were all in the 20's psi.

I'm currently running Kumho eco Solus, sidewall imprint 44 psi (supposedly a LRR tire). They were at 55 psi before the average temp here went up another 15 degrees or so. I'm scared to check the pressure now, probably 56-57 psi. I drive 600 miles weekly and have about 6 months on them now.

My winter tires are Michelin X-Ice II, rated 51 psi. I run them at 55 also. I was very impressed that I only lost about 1 mpg when I put them on last winter, vs. the Kumhos that first went on early in the previous fall. I was also impressed by how well they gripped ice. Don't know if you get any of that where you are though!