fronts will fit, could contact spring at full lock a little. it wouldn't bother me personally if the fronts at full lock rubbed a little bit on the spring. I think you will be just fine.

I'm not a fan of the inside of a moving wheel hitting any suspension component. Just sayin' :)

GoodfellaFD3S I'm not a fan of the inside of a moving wheel hitting any suspension component. Just sayin'

Ditto that sentiment.

If you are going to have wheels custom widened there is no reason to go the full 1" and get the wrong offset when you could widen them 8/10" and get the right offset.

Nothing magic about whole number nominal wheel sizes on a custom wheel.

I am not a fan of widening wheels though. You are taking a wheel engineered for specific loads and adding width to it without adding strength.

I know for the early Forgestar wheels I got they had a problem at first with the 18x11 and 18x12 on heavy Audis, BMW, Mercedes of the inner lip cracking so they re-engineered the wheels (my reinforced 18x11 is still only 22lbs).

We can probably get away with a weakened wheel with our light FDs, but it just seems like adding a point of failure on a really critical component to me.

^ I can agree with your point on widening, and really have nothing to counter those statements. I was very hesitant to have a set of wheels modified at first due to the reasons you have stated. I have, however had 2 sets of wheels widened 1" by weldcraft. The workmanship is great, and both times when I have taken the wheels/tires to get balanced the manager of the place came to personally ask me who I had do the work because he said he has never seen a set of modified wheels done so nicely or balance so well. Combine that with the many cars running way more power than me, in much heavier cars actually out competitively racing with widened wheels by them.. and I dont have too many worries. Would a set of custom offset wheels done in the first place be "better"? Maybe, but Im picky with wheel aesthetics and sometimes I find a wheel I like but its not made in a desired offset so I make due when I can. Im currently running a set of Work MCO wheels which were 18x9.5 +35, widened 1" to an effective 18x10.5 +47.

Yeah, I would love some widened NT03+Ms because of how great they look on the FD.

I'm just too scared to do it myself.

There are a bunch of wheels I like and would love widened, I don't want to pay for the wheels and widening on all of them though.

I have always liked the volk CE28N, TE37, advan RG2, 3 wheels. Get the concave ones and widen them to a higher offset.

NT03 is probably my favorite. I also like the TC105N (but the offsets even widened would be too aggressive).

I really, really like a colored CE28N on an FD. 18x10 ET 39 might work, with a 255/35 and coilovers?

BLUE TII, are you doing the 11" front fitment with a 60mm spring on the Ohlins?

ETA: Anyone have datapoints or a graph on wheel width to offset for zero scrub radius?

I really, really like a colored CE28N on an FD. 18x10 ET 39 might work, with a 255/35 and coilovers?

Sure, that will work fine. With that offset you will have to roll the front and possibly rear fender lips under with the 255.


BLUE TII, are you doing the 11" front fitment with a 60mm spring on the Ohlins?

Yes, the 18x11 +45 clears the regular Ohlins spring by some MMs at full steering lock with full front camber (using stock eccentric adjuster).

Up front I had to roll/generous pull the fenders to fit the 295s and get a 1" shorter swaybar tube for the Tripoint bar.

In rear I had to roll the fenders/slight pull for the 295s.

That is it.

Ah, awesome. Wasn't sure if the Ohlins came with 60mm springs stock or not. Thanks. :)

Haraise Ah, awesome. Wasn't sure if the Ohlins came with 60mm springs stock or not. Thanks.

65mm ID springs.

http://www.roadandtrackbyohlins.com/...MI_MASMI10.pdf

That size front (18x11 +45) yields 95mm (94.7 to be exact) of frontspacing.

Seems like an awful lot, my 'standard' fitment is 9.5 +38, which is 83mm frontspacing.

I'm looking to run a 9.5 +30 (with a 255/35), which is 91mm frontspacing and really thinking about it. At this stage you're splitting hairs and tire size and ride height really comes into play....

GoodfellaFD3S
That size front (18x11 +45) yields 95mm (94.7 to be exact) of frontspacing.

Seems like an awful lot, my 'standard' fitment is 9.5 +38, which is 83mm frontspacing.

I'm looking to run a 9.5 +30 (with a 255/35), which is 91mm frontspacing and really thinking about it. At this stage you're splitting hairs and tire size and ride height really comes into play....



When talking about fitting a tire you can't think of front space without considering the backspace.

Meaning, it is all about the offset when fitting a tire. Offset tells you where a tire is centered.

The 18x11 +45 can fit a 30mm wider tire than a 18x9.5 +30 because the offset moves the tire edge 15mm from the fender (plus 15mm gets added to the inside of the wheel fitment.)

If you can fit a 255 on +30 offset (required a fender roll for me) you can fit 285 on +45 offset on the FD (IDK I went straight to 295).

This site is great for visualizing various fitments.
Online Wheel and Tyre Fitment Calculator. Offset, Tyre Stretch and Speedo Error | Will They Fit

Not only does the offset give you an indicator, but the tire diameter or height matters as the tire rotates forward and backwards in the wheel well. a short (285/30/18) wide tire AD08R can go on some pretty wide wheels with the right offset. it gives you the most clearance with the best fitment and wide wheels (18x11 +45-42mm).

^ +1. Ive learned this myself in the past year or so of wheel research and fitments. At first I was too concerned about where size/offset of the wheel itself placed the edge of the wheel in reguards to the fender. But that really is only one piece of the puzzle and one needs to look at the larger picture of whats happening and where the tire will be centered on the wheel and what effects its width has on what tire you are running.

So I bought a fender roller and started rolling my fenders myself. A lot easier than I thought it would be. I have 17x10+38 rpf1s, how much of a roll do I need to be safe? I'm going to be running the federal 595rsr tires which is fairly narrow at 9.1 tread width. But I don't want to have issue In the future if I change to a wider 255/40/17. Any alignment changes you'd recommend ? Thanks everyone!

Depends entirely on how much camber you run for how much you have to roll the fenders.

Front-
With the stock camber maxed at 2.4 degrees you would not even need a front fender roll.

Every degree less camber than that you will need ~5.5mm more clearance.

In other words, if you just roll the top of the fender lip up against the outside fender line so it is 2x thickness but stock contour (fender roll only, no pull) then you will clear the front with stock camber.

Rear-
No fender roll required with stock camber.

With that set up and alignment with an even a wide tire, you will be ok. I would run a -1.5 front camber and -1 to -1.3 degree camber rear. I run zero toe front and rear. Roll the fronts almost flat like you are doing, ensure you heat the paint so it doesn't crack on you. Then you can run any tread width you want;) I think that is the best value set up you can have (17x10 255 tire).

I'm still deciding between tires at the moment. I was gna go with 595rsr but am now considering the Dunlop ZII because of the stiffer side walls since I have 17s. Thoughts?

I would go with 255/40/17 like you have selected. Tires is up to you. I like the extreme sports class and anything that is on sale. I would even try some of the max performance tires if you can find a good deal. I have driven on Kumho XS, RE-11 and AD08's. They are all good with the RE-11 and AD08 being very good. the XS has a small dead spot on center but they are stiffer and corner very well in the dry. lots of grip. The turn in and feel of the RE-11 and AD08 are also excellent. I also wouldn't mind trying Michelin PS2's.

Just made my order!

Forgestar cf5 in matte gunmetal

18x10 +35 with 255/35r18 r888 front

18x11 +45 with 285/30r18 r888 rear

Pics should be up in 6 weeks. Thanks for the help with sizing

Awesome! I preferred the looks of the CF5 over the F14 I got.

When you get them on the car could you do us the favor and put the rear on the front of the car for a pic as well as the other pics we want to see of your fitment.

Seems like its hard for people to believe they fit the same.

Online Wheel and Tyre Fitment Calculator. Offset, Tyre Stretch and Speedo Error | Will They Fit

I'd be happy to.

I like the cf5 a lot but had considered the f14 as well. I wish they still did that tinted brushed look but I think the mattr tinted will still look good.

I'm thinking I'll only need 10mm of pull to make these work

maybe someone can help me, im in need of 4 new tires to go on my new wheels coming in this month..
This is my first ever buying of rims and new tires for a different size rim, since i always just got the same that was on the car since i had it.
i got 18x9.5 +45 all around (will be adding spacers later to fix the offsets)

Was looking to put on them either R888 or NT01s .. i am running the 25'' ride hight front and back, may raise the back up to 25.7 depending on how the car looks with the new wheels.

i care for performance not looks, so they dont need to be super streched.. but also a size for the front that wont rub the fender liner.. Thanks for the help in advance.

Talking from experience, I like the ZII's because they are consistent. They have decent cold traction, they dont dry up (rumor has it they go strong till chording), they are good in wet and they are stiff. RS3's has similar grip when fresh but they required a warm up lap, or two and they dry up fast. Just my .02

Any extreme summer tire will be work well, im just nitpicking

The zII tires are damn near impossible to get. It seems only tire rack has them as the starspecs. I don't feel like paying for shipping and then a shop to mount separately, hard to get a deal. I found a local place to me where I could get the re11a 's for 750 out the door, or the new re71r for about 100 more. The car will mostly be street with a few track days a year so I think I'm gna go with re11a's. Should be all set monday.