How come 2011 Cayenne Turbo III 19' rims are 8.5 j x 19 and come stock with 265 tires vs the safety max of 255 wide tires. According to the below chart. 2nd question, would 265 / 50 / 19 be ok on a 957 for my winter set? Also I read the center bore is a little off from the 957 and 958.

Let me know, I would really like to use these rims.