Does anyone know what the minimum operating temperature of the PSS and PS4 tires is? I would definitely not be doing anything crazy but here in SF Bay Area we have some mornings during the winter that the temperature can drop to low 30s (0 Celsius) and rise to mid to high 40s (12 or so Celsius) during the day. I'm interested in just getting to work during these days (4 miles away), not performance driving. I tried to contact Michelin to ask about the material data sheet and they refused to give me details about what the temperature range was for either tire. Does anyone have that data and can disclose it?