I have done so many research on here and I love everyone's ideas and answers. I have 2011 g37x sedan. I have decided to get some 20's. Which would be:
20x9+35(front)245/35/20
20x10+40(rear)275/30/20
Tires maybe continental Dws
coilovers:Fortune 500. I got a number on here for the coilover and he said it will be $1150 and said I am going to need something else that will be another $ 300. 11k in front 8k rear..huh?
I am not trying to go crazy on mods.. I just need to get some nice rims that will sit nice on the car n not affect my ride. If anyone think 20s plus the coilover will affect my car holla at me.... Thnx guys

 

Wow...20's huh?

And staggered on AWD. You sir, are my hero

I wouldn't do it

A set of square 19's is my limit, around 245/40-19...maybe 255 but probably not.

 

Dont worry im also AWD just ordered TSW Bathurst 20x9/20x10 +40 both ways
245/35/20
275/30/20 V12s'
Gonna be dropped on swift springs

 

heres my X on niches
running 235/35/20 and 275/30/20 with 8.5 in the front and 10.5 in the rear
had them on for about a week now and no problems out of the awd system. Usually I can tell when the awd system kicks in and haven't felt it activate at all yet. Just got my coilovers as well and hopefully will get them on next week

 

Did u had any rubbing when it comes to the tires? Also is the car dropped?

 

Hope you're ready for a serious change in ride firmness, going from 17s to 20s is a huge difference, then going to coilovers will get firmer yet.
That said, the BEST AWD 20" combos are what Twista has 235/35/20 and 275/30/20 OR 245/35/20 and 285/30/20 this results in virtually no difference in front to rear rolling diameter variance. The 245/35/20 & 275/30/20 combo results in the back tire being almost 1% smaller, and since the rears wear faster this variance will get worse over time. Variance over 1% has caused issues w/ the AWD system so I'd for sure go w/ the 235/275 or 245/285 setups.
HTHs

 

well its not lowered yet so I have enough wheel gap to put another set of 20s on lol. I also purchased coil overs so I can raise and lower it to how I see fit hopefully. They came off a friend in my crew car and he didn't have any isssues running 20s on his awd as well. no rubbing or nothing.

Edit: The ride is a lot firmer though, I feel a lot more imperfections in the road than I use to but I like it as it makes me feel more in contact with the road. Also the wider contact patch makes the car pull into groves in the road a lot more and Im tending to have to fight to keep it straight more. I still haven't got my alignment done yet as I wanted to wait till after I install my coils.

 

I think i will probably go with the 19s... i want 20 badly but i am afraid it might be a bad choice....

 

What would u suggest doing if that was ur car when it comes to the 19 or 20 with tire size and offsets Blnewt?

 

19s change the math somewhat, you can run a 245/275 combo and be well under 1% variance. The 245/40/19 front 275/35/19 rear will result in the rear diameter just 0.52% smaller, almost twice as good as the 245/275 20" combo.
Use the site calculator when crunching tire specs
https://www.myg37.com/forums/tire_rim_calculator.php
Keep in mind 20" tires are cheaper than comparable 19s, but you will feel more of the road. I'm happy w/ my 20s and coilovers but you just need to know what you're getting into as it will be a dramatic change.
I really can't tell you what to do, IMO the lower you drop the better the 20s will look, if you just stay w/ a mild drop the 19s will look more at home.
Gotta be your call

 

BlNewt thnks alot bro. Really appreciate it.

 

The only reason why i didnt do the 285 in the rear was because it would rub the fender from what i heard and they dont offfer good tires with a 235/35/20 set up?

 

235s can be tough to find in certain brands, you might check though (if you haven't already bought tires that is). Also the 285s may just sneak in, and w/ a bit more camber they surely will. My 295s on my 10 +45s fit fine and I'm below spec camber, around -1.0 IIRC.

 

I just wanted to make sure you were aware that every time you raise or lower the car at all with coilovers, even a few millimeters, you need to get another alignment.

I wasn't sure if you meant you could raise it a little here and then lower it another day. You technically could do that, but you would need an alignment after each time, or new tires in very short periods of time.

 

I did order the 275/35/20 but im going to go back and order the 285s and i will be dropped on swift springs +40 offset, so possibly trim liner and im good?