I have a 2008 G35S. I just bought new wheels. They are 20x9 on the front and 20x10.5 in the rear. It is also a +45 offset. What tire size do you recommend? I would like to stay the same height as the stock wheels. if you know what I mean.

 

245/35R20 front and 285/30R20 rear

 

that wont stretch the tires will it?

 

nope, take a look
https://g35driver.com/forums/media-s...-inch-lip.html

 

A 305/25 r20 will also work for your 10.5 rim