19x8 up front and 19x8.5 in the rear

both setups will have the 245/40/19

sorry i can't run 19x8.5 up front because don't have the extra 2 wheels in that size.

what do you think?

will the x8.5 in the back have a little more concavity for that staggered look, or will the different sidewalls look funky?

 

I'd worry first about the outside diameter. All four corners have to match to avoid AWD issues down the road.
Otherwise, I don't see there being enough of a difference front to rear that most would likely not even notice.

 

Just run the 18x8s all around so you can rotate the wheels without having to dismount them off the 8.5 in wide rim.

 

i run 19 x 8 all around with 245 40 19. looks great. rotatable. the 8.5 will stretch the tire in the rear (ewwww).

 

The difference in wheel width will have a slight effect on the overall diameter of the tire, even if the tire used on all four corners are of the same size. It shouldn't be much, but i don't know what the threshold is for size differences between front and back on the X.

As for concavity, that would depend on offset and wheel design.

 

Not really, at least mine didn't. The tire sidewall is flush with the lip on the rim, if anything.

Here's a pic, it's not very clear but you can see what i'm referring to.

245/40/19 on 19x8.5

 

is this an X or non-X?

 

Non-X, the photo was just to illustrate the tire & wheel width comment.

 

+1, the 8.5" rim is perfect for a 245 tire, it definitely is not stretched.

I would run the same size front and back on the X, enables you to rotate tires front to back, plus you are ensured the diameters are exactly the same for your awd system.

 

alright then i'm sticking to 19x8...
thanx fellas

 

+1 the 245's on my 8" coupe rims were stretched wearing too much in the centre. 8.5" is perfect.

 

my apologies on the misunderstanding...
what i meant was if the OP goes wider rim in the rear with the same size tire on front and back, the tire won't have the same side profile and have a more "stretched" (for lack of better term) look than the front...which of course, would still be ewww.

Basically, if you're going same size tires all around, wouldn't all of you agree that the same size rims should be used, especially if you have the option such as the OP and myself had when buying?

 

Exactly Johnny, I think that is what most of the people here said.

 

^Perfect Wayne, I'm happy we cleared that up...hahahah!

A buddy of mine did that on his audi a4 (awd)... same size tires but wider rims in the rear...it didn't work at all (looks wise), just trying to save someone else the regret of doing what he did.

 

It will not throw the AWD off... Been there Ran that size...

on my X ran Coupe 19s come with 245 on 8.5 and 225 on 8 front...It threw the awd OFF
Changed the Front to 245 ran it for months, and aggressive... No problems at all...

as theyve mentioned 245 on 8.5 is perfect no stretch
245 is a stretch on 10.5 =]