I have been going back and forth between 305/55/20 and 275/60/20. My choice came from a few factors. 305's were $200 more (set) but were 1.2 inches wider and .2 inches taller which would look better. The 305's would require a 1/4 inch spacer (lots of research on this). The dealer put a set of 305/55/20 on front for me (different brand they were pro comp) to show me that they would rub on my OEM's and they did (UCA). I decided a spacer (didn't even price it) and the $200 more wasn't enough to go with the 305's. They will be installed Saturday (and so will my Superchips Vivid Linq) so I will post pics.