I'm this has been asked but here it goes again...
2009 G37x Coupe Auto 118k miles 19" square
So I am changing wheels and will have a staggered fitment. 19x8.5 and 19x 10.5 - +40 and +44. Looking for no rub and no poke. Stock suspension for now. Front is going to be 255x40 and rear I would like to be 285x40 but this is an odd size and not easy to be found. How wide can I go? I am trying to stay within that 1% difference from stock but would like some sidewal for comfort and protection.
Thoughts?

 

with those wheel specs, you can do a 255/40R19 (27 in diameter) and 295/35R19 (27.1 in diameter) and the diameter difference comes out to be 0.4%.

With stock suspension, I think you can clear a 295/35 with the 10.5" +44 on a coupe.

 

Wow, that would be fat! I'll have to check that out. I think a buddy of mine and me came out with 285x35 to be virtually "0" . Prolly not much price difference, just have to see what's more available. Thanks!

 

you can go either 285/35 or 295/35, both will give you roughly 0%. 285/35 is 26.9" while 295/35 is 27.1", so your either negative 0.4% with the 285/35 since its slightly smaller or positive 0.4% since its slightly larger.

my suggestion would be go with the 295/35.

 

im running 274/45/19. I bought the wheels second hand and they had hideous 235/25/19
on the rear i hate the stretch look. But tbh my offset wont allow mw to drop it very much

Cheat code these are fairly good tires with good tread wear only $90 each on amazon free next day shipping with prime and Mavis formerly Midas only charges $20 per wheel mounted and balanced and they take your old tires free! Im running 245/35/19 on the front but du to the offset i has to run spacers but i didnt get junk ones from autozone they actually bolt on and are torqued

 

projectpanda13 has become the man with all the fitment answers.

It's pretty cool. Thanks, Panda.

 

Thanks guys! Going to order some 285x35x19 in the next few days 👌