Update - I've put about 7k miles on the 265 AS4's and couldn't be happier with the ride, noise, and wear. High speed handling is phenomenal. I rotated at 5k after noticing the rears were showing a bit more wear than the front which I'll continue at 5k intervals. Had a chance to test out snow performance in the Sierra's and was pleased with grip and stopping performance. Snow depth was only a few inches so still need to test in deeper mountain snow to find limits. I was able to sell my OEM Goodyear's with 49 mi. for $550 on CL. Considering the AS4's were about $330/ea., not much of a dent but I'll take it!I was planning to do exactly this and doing some research and found your post. How do you feel about your decision now that it has been a few months? Also, how did you go about replacing the tires - were the shop people able to buy your 255s or did you have to sell them elsewhere and basically pay full price for 265s?