I burned through my fender liner on the 17x10 +44 setup on 16kg springs. I do believe a 17x9.5 +40 to +47 might be a good option to work with.

Possible A-arm clearance is going to be: 9.0 +63 or lower, 9.5 +56 or lower, 10.0 +50 or lower.
Proper A-arm clearance is going to be: 9.0 +60 or lower, 9.5 +54 or lower, 10.0 +47 or lower.

As you can see, the idea is to get as much inner fender clearance as possible. It's not about the A-arm fitment, but more of the inner fender structural support section. People like ASM and other serious guys cut that section out and reweld a plate to accommodate additional clearance.

BBK clearance may be possible since the wheels I'm looking at are a bit more flat, but it's not guaranteed because S2000s are challenging in general to fit wheels over BBK. All of us want a little concave look and I know these guys will design a wheel that maximizes strength with a small gain in weight.

Edit: I'm not going to sell my 17x10 setup. I'm just looking to get a 17x9.5 forged wheel made that is going to be stronger than the CE28N.

 

Yeah I get some with my 10 +58, but its only under track conditions where the wheel is cranked over and im pushing some G's to compress the susp that far. Im running 14kg springs and about 1.8-2" drop. If your slammed -2.5-3" and or running stock floppy susp, then your going to have to make a different level of compromises on fitment. I would much rather rub through the liner a bit on the inside, then deal with the consequences of that scenario on the outside, which are far more a problem. Lower or upper control arms dont rub at my fitment, though they are damn near close. My suggestion of 9.5 +60 is 5mm less aggressive to the inside then my fitment and requires no pulling fenders. Its about the best compromise you will find on stock width fenders. You can always add a spacer as well for BBK or more custom set ups, but you cant remove a spacer if you get too aggressive a wheel to start with

9.5 +55 can fit up front, but 9.5 +45 is pulling fenders territory. That may narrow your selling market, if that matters to you. You trying to have a wheel made that a half a dozen people will be excited about and go for, or just you?

 

There is? I don’t consider 9.5 wide for this car, not for the back. I consider it a average up size. 10.5"+ is what i consider wide, and other then forgestar or a custom multi piece wheel, there aren’t any real good options.

 

Inner clearance is far more problematic. How do you fix that other than by purchasing a spacer and pushing your wheels out more? I'm not going to run a DRM spacer on the track - I'd need extended studs, which is a big pain in the ass and $$$ since you'll destroy the wheel bearing in the process of getting them installed.

Outer clearance is a matter of raping your fenders, which, if you're going to run a 10"+ wheel, you should be prepared to do anyway.

If I was going 18"s, I'd just go with CCW and buy one of their forged monoblocks at $700 a piece with full custom offset options.

http://www.ccwheel.com/wheels-display.php?view=C10
http://www.ccwheel.com/wheels-display.php?view=C14

Not sure why I would need anything outside of these wheels when going 18"s. And yes, they'll cater to exactly what you're looking for as far as an 18 in both widths and offset.

Besides, he said custom forged options, which means $3K. It's the 17"s that have limited options in the market.

Maybe when I decide that the street rubber available in 17"s isn't cutting it and I'm making a bit more, I'll step up to CCWs in 18s. It's not the cost of the wheel that's a problem, it's in jump in price for the cost of tires... That said, I'd love to run some sort of combination of 255F with 285 or 295R.

 

Just ordered some ce28n17x 9.5 +47. I'm looking forward to seeing the rear clearance with a -2.8 camber with a flat roll or cut. People say this is a great size. Custom front fender will be my option, just wonder if I should do 10,15,or 20mm wider. I know re11a has a narrow tread width, so that might be the choice with these.
Bbk clearance is a yes. Just wonder if they will clear the 310mm Acura TL type s caliper. Anyone have a set of folks ordered, how long was the wait.

 

Do you mean wider?

I heard 17x9.5 square with high 40s offset are one of good choices for track and daily. CMIIW, you'd have to do fender rolling as well with this setup, which I think would be worth it. I'm not sure about BBK fitment though, I haven't done research on it lol.

Colors don't matter as long as it's not too wacky haha

 

I ordered the set in dark gunmetal. Yes, the 255 re11a is a little skinnier than the z2 starspec. Keep the fender clearance slightly safer. From what I heard the 328mm bbk clear, just not sure about mine

 

So a little bit more discussion, seems like 17x9.5 +40 might be a little too aggressive. Perhaps something between +44 and +50 will work. The bigger concern is that inner fender clearance at full compression though...