Okay...thinking 235/40-18 or 245/40-18 on 8.5" et40 D-Force Empowers; the 245s might be too much, as they'll be 9.3 mm closer to the strut and 23.4 mm further outboard in front versus the 225/40-18s that come on the stock 135M fronts. 235s squared seem quite doable at +5mm inboard and +18.4mm outboard up front.