There is so much more than a simple answer to that question. There are some pretty knowledgeable guys here so they may be able to help more than me. We have pretty much the same car and if you look at my avitar you will see it's lowered. I have 245/40ZR18 with I think 9 1/2 inch rims on the front, and I have 275/30ZR20 with I think 11 inch rims on the back, those sizes are from outside to outside of the rim, not bead to bead. Back spacing of the rims, and how low you want to go is going matter a lot. My fronts at almost full turn will rub slightly, or if I hit the corner harder it will rub a little more. If I bring it up about a half an inch I don't thinkit would rub at all. So look seriously at back spacing of your rims first, that and how low you want to go. Hopefully some others will jump in.