FOR BASE 18' OEM USERS, what kind of tires you have??
 

currently I have stock tires, which is 225/50 front and 245/45 rear. What about you guys? I want fat tires. I want to go like 245 front and 275 rear. but side wall size?? I really want to figure out the side wall size. If I would go with 245 and 275, what would be the side wall size? And which brand makes that size?

I'm running 245/45/18 front and 275/40/18 rear BFgoodrich KDW NT. I have been very happy with this setup on the stock 18s. Basically the same overall diameter as the stock set up.
http://i102.photobucket.com/albums/m...Picture657.jpg
http://i102.photobucket.com/albums/m...cture064-1.jpg

omg your Z looks HOT! :)

I was looking at Continental ExtremeContact DWS ultra all season tires. I can't afford both winter and summer tires so I'm looking at all season. I don't drive on the snow anyway so I won't have problems. it's so hard to find tires with the specific sizes I want to go with :(

X2

Awesome guys! This solidifies my decision to go with 245/45/18 front and 275/40/18 rear. Thanks

275/40-18 Rears
 

Had a three nail flat tire and two were near the sidewall. Replaced the rears with Yokohama ADVAN Sport. Fronts are stock but still have lots of tread. On my car the 275's seem like a more natural fit than the OEM size. No spacers. IMO the rounded sidewall improves the look and nicely fills in the wheel well.

Do you have issues rubbing? I imagine the 18"s have more flexibility but curious to see if you are running spacers with your set up

Stock yoko advans FTW LOL

No rubbing no spacer. However, the ride is quieter than the Yokohama Avids they replaced.