Ok guys ive searched and searched but havent really found a very definitive answer to my question. Currently im running a set of staggered Vossen CV7s on my x coupe but im really considering going with a more aggressive squared setup because of my awd. I really like the Forgestar F14s. But my question is, will 20x10.5 with like a 255/30 or 265/30 all around with say a 25-30 offset have good fitment? Also, would these specs work with any wheel, not just the concave? I know a bunch of people run dual concave with their Vossens so im assuming it should work just the same with the deep concave f14s right? Id just like to make sure the wheels would be all good before I ordered. Im lowered on BC coils and heres a pic of my ride height for reference. Sorry if this confuses anyone because I sort of confused my self writting it! If you guys have any suggestions on tire sizes and offsets, I've got an open ear! Any help is much appreciated!

 

Use the calculator along the way and you should be able to get the exact fit you want. Just use your current wheel/tire specs and put them on the top line and put your new wheel/tire size on the bottom line.
https://www.myg37.com/forums/tire_rim_calculator.php
You'll want tires closer to your oem diameter especially for an X , going w/ 255 or 265 puts you in a tougher spot since a 30 series is 2.8 & 1.8% different than oem and a 35 series is 1.02 & 2% so the 255/35/20 would be the best size of all of those. The 245/35/20 is ideal as would be the 285/30/20. So in short the 255/35/20 on your 20x10.5 would be the best compromise if you don't want a 245 stretched on them and you probably wouldn't have room up front for the big 285/30/20 although a 275/30/20 is still around 1% so that's OK, but still a tight fit up front.
As far as the offsets, just go w/ the calculator and compare them w/ your current Vossen fit.
It used to be that 3% oem diameter difference would be OK but there's been a few AWD Gs that have reported problems w/ their AWD or VDC lights when going at speeds over 80mph so keeping your diameters within +/- 1% seems to be a better approach.

 

Thanks man! Anyone know off hand of an aggressive squared setup that will work and look good on the x coupe?

 

Personally, I love those wheels. Especially on a black G37

I think that's one of the best designs for your car and I wouldn't change a thing. But if you want something more aggressive, why not PM one of the wheel vendors on here?

Nick C.

 

Lol thanks man I appreciate it, I'm thinkin about do the cf ipl splitter from Chris at Outcast and the cf AMS VIS vented hood so I think I need a little bit more aggressive of a wheel to flow better. And yea I've been talking to a few ppl to get my specs right. It's definitely a process to get specs dialed in right on this car haha