Does anyone know the largest tire/wheel size you can put on a stock S4? I know stock is 225/45-17 and Ive heard of people puting on 19s. My uncle has a set of 19 inch rims on his mercedes (5x112) that he has to turn on cause the lease is ending. Hes willing to give them to me for a good price if they will fit. The tire size is 275/35-19 which im worried might be too big. Any clues as to how big I could go? if they are too wide for the inner walls could I put spacers on them to push them out a bit?