I was wondering how the heat cycles of a tire influence its overall grip and lifespan. I have heard much about this and I somewhat understand that when a tire is subjected to many different temperature ranges it somehow changes the rubber. I am curious what kinds of changes are happening on a chemical and physical level. Also, i just purchased the Falken Azenis 615 and am curious as to how much heat cycles come into play on this tire, or if it is more of a problem with R-compound rubber.