Thanks MikeM for the heads up on the Z06 tires ( didn't know that, sorry) obviously I need to stick to what I know and many others know to be true about the Shelby GT 350 summer tires (not cup 2's) and driving below 45 degrees only to be unsafe to do so as per owners supplement, nothing of cracking (not what Michelin or some one says) therefore making Ford responsible if they did crack outside below 45 degrees. As I told that fool Iceage there is not a single one reported on any of the well discussed Shelby forums of those in the winter asking about it and having confused them with the cup 2's which is clearly stated in the Shelby R owners supplement will crack. Again thanks for the info and have a nice day. No since keeping this going any longer with Iceage who if really did have a Shelby GT 350 does not know how to to read the owners supplement or ask and research on other Shelby forums and get the exact same answer as mine. This is definitely my last post on this subject.