Okay, per Rishie's expert analysis, let's try this again (and let me know if this is right):

Front Wheels:
8.5 inches measured from inside of the rim = Total Spacing
9.5 inches from outside lip to outside - Total Outer Spacing
Backspace to outside lip = 6.5 inches (I know I posted earlier this was to the inside but I know this goes to the outside and is correct - the guy put a straight edge over the lip and measured to this)

So 9.5 TOS/2 = 4.75 which is smaller that the backspace of 6.5, so I have a positive offset of 6.5 - 4.75 = 1.75 inches or in mm:

+44.5 offset

Rear Wheels:
12.5 inches measured from inside of the rim = Total Spacing
13.5 inches from outside lip to outside - Total Outer Spacing
Backspace to outside lip = 7.625 inches
So 13.5 TOS/2 = 6.75 which is smaller that the backspace of 7.625, so I have a positive offset of 7.625 - 6.75 = 0.875 inches or in mm:

+22.2 offset

Rishie, sound correct?

Now, to complicate matters, I am going to push out the front rims a bit, probably be about 1/4 to 1/2 inches to make the rims more flush with the fenders so my front offsets have to be redone!

Finally, I second the recommendation for Forgeline rims. I have had mine for 5 years and they are a great 3 piece product with many nice styles. Here are mine:

 

so since i ordered my wheels from the modcity.com back in october last year they finally started making them last week they said. so lets see how long they take. maybe i will get them this year... MAYBE

 

Roto - Congrats on phase 1. BOL i'm keeping my eyes peeled. It's funny cause I met with the Iforged Owner and checked out the facility. If this falls through I'm confident that I can make sure your Sprints come out fine. I'll do some quality control for ya.

David,

Just one correction:

Total Spacing, imho, would be Front Spacing + Back Spacing = total Spacing. This means that semantically the larger # is the total spacing. The smaller # I don't know what to call it other than the "manufacturer's printed rim width". lol.

HOWEVER YOUR CALCULATIONS ARE CORRECT AND YOUR FITMENT ALSO SOUNDS CORRECT FOR THE FD with the Petit.

AND I CAN UNDERSTAND WHY YOU NEED TO PUSH OUT THE FRONT SOME MORE.

So basically let's translate this into "THE CATALOGUE SIZE".

18x8.5 +44.5
18x12.5 +22.25 offset

Sweet goodness that's basically what I recommend, well wider for the front. Go figure........

OK so now my recommendation is to SEND BACK THE FRONTS and have them built wider. hehe.

Ask for a 9.5" +45 ish. Then run 265/35 up there to improve the steering response.

Worst case a 5mm spacer is about the limit otherwise for the existing wheel.

Car looks great too.

Rishie

 

That is what is on the front of my old car...9.5 +45 with 265s

 

I guess I am not a wheel guy as this stuff seems like a foreign language to me. But I do try.

I am trying out some 1/4 inch spacers tomorrow and we'll see how those work out. I have the extended ARP studs and will run 255s. Hope this works out.

 

so my wheels are supposed to be completed and ready for shipping by the 20th im guaranteed. We will see..... If not im doing a BIG write up.

 

Look forward to seeing them.

As an aside, I ended up using 1/2 inch spacers on the front to push my wheel flush with the fenders. Looks much better IMO. Now I just have to recalculate the offset

 

haha no more calcs. But that's awesome, a good easy way to achieve the look you wanted.

your offset is simply going to be reduced by the width of the spacer. i.e. +45 minus half inch spacer is like a +33.

Rishie

 

so my wheels are still not here even though i ordered in october of last year. I will NEVER DO BUSINESS WITH THEMODCITY.COM AGAIN! MITCH IS AN ABSOLUTE LIAR! He talks in circles and i keep catching him in lies. Even worse he wont return my deposit. He said that even though they are late he wont rteturn it, which would be reasonable if they were a few weeks or even a month late but five months?!!! come on!

 

That sucks pretty bad. Did you pay via credit card? If so, I would file a claim with them and let them handle it. AMEX has worked wonders for me in the past.

As an aside, I had to raise my backend up about 1/2 inch to accommodate the 335s. They were rubbing pretty bad on the inside top fender wells. Every time I went around a corner at Deal's Gap, I'd hear a nice screeching sound

 

sadly i paid with a debit card im going to have to get my attorney to talk to him sadly and see if he can work something out in the mean time just lettlng everyone know avoid Mitch from themodcity.com and iconz wheels like the plague! now off to as many forums as possible to let everyone know their shady business practices and hopefully sink their business.

 

alex i'm gonna contact HRE for you tomorrow. sorry been real tied up with warehouse inventory crap.