Just ordered these for my R56 (http://www.amazon.com/gp/product/B00...00_i00_details) and am trying to figure out the optimal tire size. My goals are basically these:

• avoid rubbing
• work with the stock/oem suspension
• get reasonably close to the OEM wheel diameter in total

Depending on how things look once they're on the car, I'm considering some springs at some point. If a tire size might leave the door open on this, that would be a plus (but not essential). Some sizes that come to mind thus far (feel free to comment on these, any pluses/minuses I should consider?):

• 215/35/R18
• 225/35/R18
• 215/40/R18
• 225/40/R18

Any advice welcome!

 

I'd be looking at 215/35R18. Good fit, depends on your wheel offset. Its short enough to fit for most offsets.

 

Awesome, thanks for the tip! I went ahead and ordered some 215s. I was considering 225s for some more sidewall and pothole protection, but with brand new wheels I want to play it safe as far as fitment and rubbing goes. If all goes well I may consider switching to 225s next time I need new tires.