NVTHIS

I have a spare set of polished 17x9.5 OE Z16 wheels and am needing some tires for them. They currently have 275/40/zr17 on them, but I am looking for the best size to accommodate the way my car sits. It is lowered on wcc lowering bolts as far as you can go. I am currently running 18" Mallett 396's all around. Trying to see what tire will help fill the wheel gap when I use the 17x9.5. Any suggestions? Need to know the widest tire possible and still not interfere with the rear brake ducts.