I'm tire dumb. Size compadability question
 

Will 245/45ZR18 fit on the 18/8 factory wheels?

yep

they sure will

tirerack.com for more info;)

Yes, just had four 245/45 18in. put on my car. But I wouldn't go beyond 245 for the front tire. The upper control arms on the front suspension are about to scrape onto the inner tire's side wall. Here are the pics from another thread:

https://g35driver.com/forums/wheels-tires/145384-need-new-tires-2005-ss-18-s-suggestions.html

I searched tirerack.com for more info, and I can't find jack about wheel/tire compadability.

I'm thinking of getting these hoe's from EBay. (I have stock 17's now, with winter tires on. Want to do summer/winter wheel setups rather then remount tires

http://cgi.ebay.com/ebaymotors/18-8-...QQcmdZViewItem

Just need to confirm the offset comparability
http://oewheels.net/oe-i-g35-c-p-2-x.jpg

http://oewheels.net/oe-i-g35-c-p-3-x.jpg

Those are coupe spec. wheels, meaning they have a 30+ offset. They are supposed to fit 03-05 sedans too though...

Also you may want to check out how much the wheels weigh since they are replicas. I'm thinking to buy from the same sellers, the black G35 wheels for my IP coupe.

Looks like everything should fit up nicely. At the widest point, the tire will be .8" wider on each side of the hub. If not, I guess I'll be learning about spacers...

Re the seller: he has a pretty impressive track record of customers, so I feel comfortable buying from him.