20x10+25 & 20x11+28 would be the same combo that is posted in that video clip. Check the pics in Simpsons post https://www.myg37.com/forums/brakes-...ml#post3891573 The 20x11 +28 would be 6mm out for the wheel width and 3mm in for the offset, so a net 3mm out from Simpsons setup w/ 275s, it's a tight fit back there for sure, may have to run heavier camber to get the tuck or possibly a 265 width to net the same fit as Simpsons at the fender.

 

Awesome, so in your opinion do you think I still will need to roll/cut the rear fenders? Either way I am ready and have a local shop ready just was curious.....When you say run heavier camber how would I do that? Buy a camber kit? And what tire size would you recommend for my front 20x10 wheel, if I plan on getting a 275/30/20 for the rear 20x11 wheel +28....Thanks!

 

The rear fenders are already flat rolled, I would stay away from any fender pulling or cutting, it rarely looks very good and makes it harder to sell if & when. As far as camber, you can add the rear SPC camber arm/toe bolt kit, this will allow you to get toe in spec and run a much wider range of camber. If you are totally set on the 275s you'll be 3mm out from those pics in Simpsons post. At the minimum you'll have to trim the rear fender bracket and probably run camber in the -2.5 to -3 range so expect some increased inner tread wear. If you want to avoid that, or at least make it better I'd run 265/30s. And FWIW you have to decrease your sidewall series as you go wider if you want to keep the diameters similar. If you were to run a 245/35 front 275/35 rear the diameters would be over 3/4" different. A 245/35 & 275/30 would only be about a 1/4" off. You can use this on site calculator to try different combos https://www.myg37.com/forums/tire_rim_calculator.php

 

Awesome, so it sounds if I'm reading your replies right on my setup for the 20x10 +28 I should run a 245/35/20 and the rear a 265/30/20 for the best possible fitment without having any major complications with fitmentm now as far as driveability is this going to affect my speedo or be unsafe at all as higher speeds? This is my daily driver . thanks.

 

The rear tires will be about a 1/2" shorter which isn't ideal, also the 265/30s aren't a real common size so the exact tire you want may not be available in that size. I hate to recommend such a tight fit as that 275 on your 11" +28 but that may be your best option given the choices you have and a 275 is a better mount on that 11" width. So yeah, the 245/35 & 275/30 combo would be best for availability, similar diameter, and mount (both would be considered a stretch on those wheel widths). This is one of those combos that's up to you, it's just too tight for me to give a green light, if I could see Simpsons setup firsthand or that one in the video clip that would make it easier. I just don't want to say it will be no problem and then you plunk down that cash and you're not able to make it work

 

Here's a list of pics on various G coupes on some aggressive 20x11s to give you an idea. Might contact Rohanna to see what tire sizing they used for the photos. https://www.myg37.com/forums/wheel-a...ml#post3652072

 

20s on a daily is going to be a fairly rough ride, especially with such a low profile.
If I were you, I'd find a set with slightly less aggressive specs and run a wider tire...the G37 can't fit the same aggressive wheels as an older G35 can ie; my G35 running 19x11+15 rear on 285 with at least 15mm to spare...hello 305 club!

 

Would 255/30/20 be better for the front 20x10 wheel?

 

Would be a better mount for sure than the 245.

 

So if I'm pairing this setup which would be the most optimal.....20x10 +25 front with 255/35/20 or 255/30/20? Would the front have a better chance of rubbing with the 255/30 or 255/35? Im guessing the 35 but you let me know with the combo of rear tire size whats the best pairing please...... and rear 20x11 +28 rear with 275/30/20. Thanks again in advance.

 

255/30 is the right choice

 

Thinking about picking up the Nismo S rims, since the deal is ridiculous. I'd get 4x fronts, which are 19x9.0 +47. I have a 2013 X Sedan. These would be a summer setup only.

I use the car as a commuter, so I really don't want to lower it. What tire combo do I need to make sure that the car doesn't look lifted? I'd like to keep as close to the same ride height. The car currently has 225-55-17's

Not great on wheel/tire math, any help would be appreciated. Thanks!

 

245/40/19 would be the ideal size.

 

18x10 +38 with 285/30/18 tire

Enkei RPF1, will it fit?

 

edit: missed the sig
are you planning on square or...