I want to put on a set of Enkei RPF-1s, 18x9.5/18x10.5, +15 offset on my 06 350z base. I have no idea what size tires to run. I have had the wheels for a few weeks and desperately want to get them on. A friend of mine suggested 265/35 front and 285/35 rear. I would really appreciate any help. Suspension setup is bone stock. If anyone is running the same wheel setup, some pics would be awesome.

 

i would go with 295/30/19 for the rear and 265/30/19 for the front but u will have to roll your rear fenders

 

There are several posts in the Top 100 Questions thread that answer this very question. 9½/10½ wheels are a very common size. Easy to find the correct tire sizes based on all the info here.