I am considering it, I just leaned towards the 19s because I think they look a little better. What size tires could I run with the 18s would it still be 265/275 front with a 35 sidewall and 275/285 with 35 sidewall rear? If thats the case I am sure the little extra sidewall would help out on the track. My concern is just whether that little bit of height on the sidewall would make enough difference in handling to choose them over the look of the 19s. I think the weight difference between the two sizes is only about 1.5 pounds.
09 E92 M3- Sold
07 E92 335i- Sold