I have a P85+. I've had 3 flat tires and bent rims since the weather really deteriorated here in the NorthEast.. Initially Service Center told me that I could not get the 19" radials on a P85+. Now I am told that if I sign a waiver, they will put on the radials but only for the winter. Ive only had my car for a couple of months before this happened so I don't know what I will experience during the rest of the year, but am hopeful that it won't be this bad. Any suggestions/advice would be much appreciated.