I'm a new PPV owner and the auction stuck on four really crappy junk tires after they took the pictures [imagine that] and now I'm having to get new tires before I hit the road. The tire shop in town wants to put 265/70-17's on it [as other Tahoe's use the same size] and doesn't have 265/60-17's. Besides the obvious 3% size difference between the two sizes has anyone ever sized up and what has your experience??