After much research, here's the setup I came up with that I think will meet my needs. I am asking for a double check to see I did this correctly since it is my first time swapping out OEM wheels.

Car: '13 x Sedan, no mods yet but will be getting Fortune 500 coilovers within the year
Wheels: Rohana RC7 19x8.5 +35 (square)
Tires: 245/40/19 (Michelin Pilot Sport A/S 3)

What I'm looking for:
I'm looking to get wheels that will be somewhat flush but not necessarily dead even. I am definitely not looking to have my wheels sticking out nor in, just somewhat flush.

I plan on getting coils soon enough but this will have to be done in stages and since I need to replace my tires sooner than expected, this will need to get done first. I am not planning on slamming my car but will do a decent drop once I get the coilovers and get rid of most of the wheel gap.

I chose 19's because I personally don't like 20's on sedans (to each his own) and the harsher ride but 18's look too small, hence the middle ground. Once lowered, I'm envisioning a somewhat flush look with low profile tires that are not stretched. (Basically, don't really dig fat sidewalls nor the stretched look) Finally, I chose a square setup since I didn't feel like dealing with circumferences, etc.

Anyway, I just wanted to see if I got the numbers right for what I'm looking for. Thanks in advance and I must say, researching goes a long way!

 

If you're planning on lowering enough to completely get rid of the wheel gap, I'd suggest something a little wider. 8.5 +35 will be slightly on the tucked side when lowered. I have zero wheel gap and I'm running 19x9.5 +35 all around on 245/40/19 tires. I think what I have is what you're looking for. It's flush but not sticking out or rubbing. (I actually have a little extra room to add maybe a 5mm spacer) I've got a bunch more pictures on my Instagram.

 

Thanks for chiming in. Yes, your setup is what I'm looking for based on the pic.

It looks like RC7 19x9.5's come with +40 only and when I look at one particular site, they say it won't fit. The rear I know won't be a problem but perhaps it has to do with the front. I'll have to take a further look into the sizing. I may end up still getting the 8.5's since the RC7's are really the one I've narrowed it down to but I can at least know what to expect.

 

A lot of wheel sites aren't 100% accurate, sometimes they say it won't fit because the 9.5 width is meant for rear wheels, while the 8.5 widths are meant for the fronts. In reality, 19x9.5 +40 should fit unless you have big brakes.

 

Not that I doubted you but did my due diligence (quoted below) and found that 20x10 +40's fit so 19x9.5 +40's should fit as you mentioned. And to answer your question, I'm a stock '13 x Sedan, no big brakes.

A few further questions if I may:

1. Should the turning radius or the tires rubbing on the fender or the inside wheel-well while turning be a concern at all?
2. The 20x10 +40's in the pics below stick out a bit more than I would prefer (but could live with it), much like what the user mentioned. Would the 19x9.5 +40's look about the same or a bit more in? If it would be similar, I might stick with the 8.5's.

Thanks again.

 

No worries, it never hurts to do your own research

With 19x9.5 +40 I don't think you'll have any issues with clearance on the inside or with turning radius.

When you lower your car, the wheels will tuck into the fenders naturally. I believe the car in the pictures is on stock height, so that's why it sticks out. You can see how in my picture, the wheels are not sticking out, and my wheels have 5mm less offset.

 

Thanks for taking the time out to respond. And yes, I just realized that shocks are at an angle and it makes sense that it will tuck in as you lower. Will post of pics when installed.

 

The inner clearance on a 10" +40 will be close, the steering knuckle takes an outward turn so as you go taller in wheel diameter you have a bit more clearance. I do know that my 18x9.5 +38s have about 3/8" clearance, and I know the 18x9.5 +45 is about 1/8" away, so a 10" +40 will be 5mm in for the offset and 6mm out for the added 1/2" width, (for a net 1mm extra) and being 1" greater in diameter will give you more room as the knuckle goes away from the wheel edge there. So in short, you should have about a 1/4" clearance there.

Here's a couple shots of my 18x9.5 +38s on 245 width tires, your 10" +40s will be about 4mm further out than mine and for a 10" width you'd want to run a 255/40/19 minimum width, so your tire edge will be an additional 5mm out (which won't be a problem as it will tuck.

 

blnewt, what I'd not give for your tucked look!

I own a G37X model Sedan. My Stance XR1 coilover's w/ r/camber kit finally arrive this week. Once the parts are installed does the input of this thread suggest I have a chance of gaining some noticeable tuck of my wheels/tires? That would be a welcome.

My wheels/tires are f/19x9 +35 245/40 r/19x10 +41 275/35 - Thank you.

 

Once you lower the car your wheels will tuck in naturally from the drop. It should be a better fit once you get it lowered.

 

thx for the reply - that's very encouraging news! So there's an additional benefit of installing this gear besides simply spending more money?

for the benefit of others like myself who are also clueless about the geometric and/or engineering principles at work, what is it about a coilover install that creates a "natural" tuck?

 

I'm not exactly sure on the "how" or "why" myself, all I know is that in the end, the more your car is lowered, the more the wheels will tuck. Lol