So, I was hoping that you might respond to my correspondence, so I'm trying again. Have you made any decisions about the wheels and tires yet? Are you going with 275/30 or 265/35 on OEM 20" wheels, or have you decided on some other option. I'm currently facing the same dilemma and would like to see what others are doing. I was told that the 275/30/20 may actually cause some rubbing when the wheels were in full lock, but otherwise they would probably be ok. Do you have any additional info on this topic? Thanks.

Have you made a decision about the tires/wheels yet? I'm in the same situation with OEM 20" wheels on S5 with summer tires but need to swap them out for winter months. Was leaning toward putting all seasons on the 20x9 OEM rims and just using them year 'round. Don't know what I'll do with the OE summer tires (500 miles on them). So, what's the verdict on 275/30/20 tires vs. 265/35/20 tires? I was pretty much convinced that 275/30/20 would be fine, until I just read your post(s). Any advice is welcomed. Thanks.