Hello Everyone!

My current stock tire size on my 06 G35 6MT sedan is 235/45-18. I would like to slightly increasy width of the tires for a bit more buffier look.
My question is; how wide can I go on front/back tire size without replacing the rims or doing any type of other modifications.
Any input is much appreciated...

 

search or choose 255

 

so you saying I will be ok on all 4's with 255/45-18 or perhaps I should go with 255/40-18.

 

255 is much to wide for a 7.5" rim. The widest you should go on the 7.5 is a 245 width. The narrowest reccommended rim for a 255 is 8.5" width.