heres the sizes I am thinking?

[Lumpyguy]

XXR 530s in Flat black

18x7.5 +35 5x100 front
18x8.75 +33 5x100 Rear

Federal SS 595 in 255 35 18 for the rear 25" diameter
Federal SS 595 in 225 35 18 for the front 24.2" diameter

I really like the idea of 18" all around, anyone had something similar to this?

[wleehendrick]

I have XXR 530 wheels, but staggered (17x7 +35, 18x8.75+35); I went with 17's in front for a number of reasons:

An 18" is front will have a very short sidewall and there are limited tire options to choose from. I cancelled 2 orders for Federals due to backorder status, and went with Kumho's instead. 17's seem to have more tire options to get the recommended 24" OD (215/40).

On my Z, I had a staggered 19" and always wish I had gone 18" in front instead. I think having the same sidewall height front/rear is preferred, as I could always tell the front sidewall was really short/stiff.

Also, aesthetically, since the read OD needs to be 1" larger than the front, I think it looks better to put the extra height in the rim, rather than the sidewall, but that's personal preference.

[Frank818]

Erik THE FLASH Treves had 18s all around. 235s up front if I recall, Federals as well.