Need advice on Backspacing and offset measurements!!! HELP!

[mwaull]

I am in the market for either some HRE or IForged wheels. I want these sizes . . .

18x9 with 265/35s
18x11 with 335/30s (michelin pilots)

I wanted to check with you all to ensure i get the correct backspacing and offsets so that they will fit. I talked with JKDCobra03 and he has the same setup (except 9.5" wide front) and he said that CCW gave him these measurements:

Offsets: front - 25mm
rear - 19mm

Backspacing: front - 6.25
rear - 6.75

So i was pretty sure this is what i would need because he said his fit great. Well then i emailed CCW and they gave me these measurements for my exact setup (wheels and tires with sizes):

offsets: SAME

Backspacing: front - 6
rear - 6.5

Now i figured the front might be correct because I want a 9" wide front compared to JKDcobra03's 9.5". . . but the rears they gave me something different! WHICH DO I USE???

I emailed Mustang Magic earlier today too because they have 18x9 with 265s and 18x11 with 335s on their project 03 cobra. Hope they email soon . .

Someone shine some light on me!!! I just want my wheels to fit!!!

:bash:

 

[mwaull]

Anyone with an 11" wide rear wheel??? Come on guys!

 

[JoeNashville]

11 inch rears on a IRS Cobra is pretty extreme dude. I think you're breaking new ground here...ask for some pics of Mustang Magic's car, to see if the tire/wheel sticks out or rubs inboard. I'd wonder how in the world it would fit, especially without the button head bolt mod.

 

[mwaull]

there are plenty of guys on here with 11" rears . . . there are about 4-5 i know of with the street competition CCW rims. I have talked to a couple that have the 335s as well and with the BS and offset from CCW, its not even close to the IRS bolt.

 

[mwaull]

ttt

 

[pablo escobar]

I am also looking into I-Forged 11-inch rear.

But i'm thinking maybe 19-inch.

I also told them the car(04 cobra) would be lowered.

2 different shops in South Florida told me no problem because they did it already on other cobras.

I'm waiting for them to contact I-Forged and let me know what is possible.

 

[pablo escobar]

Oh I also forgot, if you're not sure whether JKDCobra03 or CCW is right.....ask HRE and see what they say for backspacing.