I just thought that I would post some information when it comes to putting 18's on my CL-S. When I bought my wheels 18/7.5 and decided to run 225/40/r18. What I found is that even though I had a comptech drop the wheel gap both front and back was still too big. So i decided to change my tires. I am now running 225/45/R18 and they are the perfect fit. That size tire is hard to find, but I am curently running Toyo Proxes 4's and I really like them....hope this helps someone!!!!