Post a pic... I have that size on my 9.5 inch wheels, maybe ill swap them into my stockers.

Attached are some pictures of my setup -
245/45-18 Front
265/45-18 Rear

I think they fill up the wheel wells much better with this slightly larger sidewall.

Here are mine with 245/40/18 front and 255/40/18 rear I like JMII's set up definitely takes up the wheel gap a bit
https://cimg0.ibsrv.net/gimg/my350z....08707462e4.jpg

https://cimg3.ibsrv.net/gimg/my350z....d05d491565.jpg

https://cimg5.ibsrv.net/gimg/my350z....7b9b17ac5a.jpg

Hi JMII,
I have a 2006 Roadster with stock wheels like you had on your former Z: Fronts 18" x 8" and Rears 18 x 8.5". I like the way you tire upgrade looked on your ride. Where you able to mount and fit these without spacers or any height adjustment? Rubbing on turn in? Rubbing on bumps? Thanks!

Positraction