I run 235/40/18 with 50 offset on a stock b spec with pretty conservative (read standard) alignment settings. Not had a single issue. Having said that there is probably only about 3 more mm to spare before i might have to consider some counter measures.
if you are going 44 offset (6mm more than mine) then yes you may have some issues, but having said that, i is only going to be a small amount that you will need to gain. If you can get 3-4mm extr clearance from some careful guard pulling, should be sweet as.
Cheers