So I know this is a hot topic for folks, decided I would show what I did for my solution. I mounted a 225/35/19 on a factory Brembo wheel. Its stretched, but it is actually a tire manufacturers approved rim width for this size...

http://www.tirerack.com/tires/tires....=235WR9DZ101XL




Since it is stretched, I put a piece of carpet in the bottom of the wheel well to prevent the rim from rubbing on the wheel well or potentially creating noise. I was able to fit a jack, stock tire inflator, quart of oil, funnel, and tire chocks inside the wheel well within the rim! Heck, I also fit a small socket set between the tire and the back wall of the trunk!



This leaves one more hurdle, the trunk carpet/mat...its is simple enough. I replaced the push pins in the floor mat piece with 1/4" carriage bolts. Use the existing hole, put a bolt in with washers and a nut to hold it in place, then use the factory holes in the body to keep the mat in place. I really haven't noticed a practical difference; losing an inch in trunk height is not that drastic, and now I have a full sized spare that I can use as long as I want on any corner.




While I was at the tire shop I discovered that a 245/45/18 will fit in the well also. (I physically put one in there). This might be a better solution bc you can get an 18x8 wheel which won't stick up from the wheel well as much... I could not find a 19x8 that cleared the brembos...

 

Wow! That's hard to believe that's an approved tire for that rim. I suppose though it's probably better than a donut spare

 

Very nice. Bravo

 

Great solution! Is that tire and wheel secured or just sitting in the tire well?

 

I know, I was quite surprised myself. When the guy at the tire shop told me I just nodded. Went home to look it up myself, and sure enough... I think part of it is the "rim protector" feature makes it look like its not seated properly, even though it is.

Thanks. Not secured with a bolt or anything like that, but I do have a socket set in there as well which jams the wheel in place. I've certainly put the car through its paces since then and it has not budged.