Hey guys I'm not sure if I'm posting in the right Place but I'm trying to buy some rims off CL and the rim s are 19in. Stagger. Front are 8.5in wide and back are 9.5 I think with a 20 offset I'm driving a 2010 g37x sedan I use to have a 04 fx35 awd and I heard I couldnt put stagger rims because of the awd light would come on. Is it the same concept for the g37x

 

Make sure the rolling diameter ends up being within 3% of each other and you'll be fine

 

Here's the sub-forum for tire/wheel concerns
Wheels & Tires - MyG37
That said, as long as your new tires are within 3% of your OEM tire diameter you should be OK, ideally within 1% should be your goal to keep your speedo accurate. Get over 3% difference and your traction control & ABS systems could be affected. You also want to keep your front & rear diameters within 3% of each other. Here's a great calculator to see what sizes you can tolerate
https://www.myg37.com/forums/tire_rim_calculator.php
Your stock offsets are around +45 I believe, so +20 offset will push your wheels out an additional inch on top of any added width over your stock wheels. I think the stockers are 7.5" wide so you'll be a half in wider in front and one inch wider in back on top of the inch offset difference. This will probably result in tires poking out from the fenders unless you're dropped pretty low, and even then they may extend beyond the fenders. Offsets in the 35-45 range would be a better fit for sedans, on coupes the would be a much better fit IMO.

 

What you mean when you say 3% this is the tired size 235/35/19 on the front & 275/30/19 on the rear

 

If you have the stock 17" rims your original size is 225/55-17
If you have 18" rims your original size is 225/50-18
Using the calculator in my above reply you enter the original size on top line and your new tire size in the bottom, it will show you the difference in width & diameter. You need to keep your new diameter within 3% of your original tire size.
Keep in mind the wheels you listed have very aggressive offsets for a sedan and that will cause issues w/ clearance, so you need to have tires w/ the correct diameter, and offsets that will place your wheels inside the fender wells. The smaller the offset the more your wheel will stick out.
like I said offsets in the 35-45 range are much more suited to sedans, those offsets in the wheels you listed are much better suited for the wider fenderwells of the G coupe.

 

you're so thorough lol. i would've just posted the link and then had to come back multiple times and answer more questions.

 

The ATTESA and stability control systems are fairly complex in order achieve such a high bandwidth (quick reaction to inputs), which means each is expecting a set of known inputs and in particular traction. From the factory the RWD Sport has staggered sizes (225 F & 245 R) yet the x Sport does not (225 F&R). Infiniti did this for a reason. Why? Whose to know but without further checking my advice is if you run staggered sizes on an x expect some unforeseen issues if not out-n-out problems.