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Old Apr 16, 2009 | 05:15 AM
  #556  
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Thanks all! I'm going w/ the 15mm spacer and holding my breadth!
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Old Apr 16, 2009 | 05:18 AM
  #557  
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Thanks again everyone...

one more situation - the fronts.
I can run 19x8.5 (245/35/19) w/ a 23mm offset or a 28mm offset...

what do you think I could get away with?
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Old Apr 16, 2009 | 07:20 AM
  #558  
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what wheels did u decided on? the volks or bbs
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Old Apr 16, 2009 | 08:10 AM
  #559  
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Volks... couldn't justify $5K for wheels...
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Old Apr 16, 2009 | 09:10 AM
  #560  
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Originally Posted by mikez
Your instinct serves you correct sir, with 15mm spacers on a 275 you should not rub, with 15mm spacer you are 1mm less aggressive than my 18x10 +38 on 275 (yours is the equivalent of 19x10 +39) so you will be okay.

The only factor is with 275 you might bulge out a bit more than me... but even if you do rub, you only need to roll a tiny bit, like 1mm ~ 2mm of clearance.
Hey Mikez, can you try and explain how you came up with the calculations? I want to try and learn this stuff and get a better understanding.

Oh and BTW, if in fact it will be equivalent to a 19x10 +39, you'll be safe. I'm currently running a 19x10 +40 with 275/30's with 0 rubbing issues and no fender mods.
As for your fronts, I think you may need to run a 235/35 and mod the fender liner with that low of an offset.
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Old Apr 16, 2009 | 09:18 AM
  #561  
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Well one inch = 25mm, so a wheel's increase from 9.5" to 10" is an increase of half an inch or 12.5mm.

So you take the offset from 9.5", which is (42-15 = 27mm), and you add the extra increase in width (12.5mm) onto it and you get a 19x10" rim, 27mm+12.5mm = 39.5mm.

A wider wheel, same overall "offset" in terms of flushness
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Old Apr 16, 2009 | 10:02 AM
  #562  
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Originally Posted by mikez
Well one inch = 25mm, so a wheel's increase from 9.5" to 10" is an increase of half an inch or 12.5mm.

So you take the offset from 9.5", which is (42-15 = 27mm), and you add the extra increase in width (12.5mm) onto it and you get a 19x10" rim, 27mm+12.5mm = 39.5mm.

A wider wheel, same overall "offset" in terms of flushness
Thanks brother, I appreciate it. I think I was heading towards the right idea, but somehow took a wrong turn.
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Old Apr 16, 2009 | 11:54 AM
  #563  
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Originally Posted by mikez
Your instinct serves you correct sir, with 15mm spacers on a 275 you should not rub, with 15mm spacer you are 1mm less aggressive than my 18x10 +38 on 275 (yours is the equivalent of 19x10 +39) so you will be okay.

The only factor is with 275 you might bulge out a bit more than me... but even if you do rub, you only need to roll a tiny bit, like 1mm ~ 2mm of clearance.
a wheel with width 9.5 with offset + 32 is the same as width 10 with offset + 38

Got it off a wheel offset calculator. Used them before I got my spacers.

Originally Posted by mdgrwl
Thanks again everyone...

one more situation - the fronts.
I can run 19x8.5 (245/35/19) w/ a 23mm offset or a 28mm offset...

what do you think I could get away with?
Dont think you will get away with the +23 with 245/35 tires. Maybe the +28.

Mine is 19x9 +27 which is equivalent to 19x8.5 +21, and i am already rubbing the fender with 225/35/19 but my car is lower than yours.

That is all i can tell you based on my own experience....

Last edited by radicalrev; Apr 16, 2009 at 11:57 AM.
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Old Apr 16, 2009 | 11:58 AM
  #564  
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Originally Posted by radicalrev

That is all i can tell you....
All I can tell you.........................is that your car is hot. Did you powder coat your CX's? I've been thinking of doing the same thing, but my IS is GFM.
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Old Apr 16, 2009 | 12:05 PM
  #565  
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Originally Posted by radicalrev
a wheel with width 9.5 with offset + 32 is the same as width 10 with offset + 38

Got it off a wheel offset calculator. Used them before I got my spacers.



Dont think you will get away with the +23 with 245/35 tires. Maybe the +28.

Mine is 19x9 +27 which is equivalent to 19x8.5 +21, and i am already rubbing the fender with 225/35/19 but my car is lower than yours.

That is all i can tell you based on my own experience....
Which reminds me I made a stupid math error.

I forgot to divide the 12.5mm by 2 because its half an inch added to the whole wheel... 1/4 inch to the left side of center line, 1/4 to the right side of center line... ops

In that case 19x9.5 +27mm will be hella aggressive

Last edited by mikez; Apr 16, 2009 at 01:17 PM.
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Old Apr 16, 2009 | 12:25 PM
  #566  
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^ Anything below 30 is consider aggressive IMO.

Originally Posted by Silver'04
All I can tell you.........................is that your car is hot. Did you powder coat your CX's? I've been thinking of doing the same thing, but my IS is GFM.
Thanks, yes i did. Be bold or go home! LOL...
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Old Apr 16, 2009 | 02:04 PM
  #567  
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Originally Posted by radicalrev
8.

Mine is 19x9 +27 which is equivalent to 19x8.5 +21, and i am already rubbing the fender with 225/35/19 but my car is lower than yours.
How do you think i feel? I have a 19x8.5 +18 with a 215/35 and dumped on coilovers....i try not to think about the rubbing
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Old Apr 16, 2009 | 03:47 PM
  #568  
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You can try raising it....

*runs away*
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Old Apr 16, 2009 | 03:49 PM
  #569  
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Originally Posted by mdgrwl
Thanks again everyone...

one more situation - the fronts.
I can run 19x8.5 (245/35/19) w/ a 23mm offset or a 28mm offset...

what do you think I could get away with?
this setup is just insane.. say goodbye to your fenders if you run a 245

get a 225/35/19 to make it fit, or run 245/35/19 and get a 35+ offset
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Old Apr 16, 2009 | 05:45 PM
  #570  
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you have an AWD......your front tires should be 235/35/19..or your overall diametor is......also..at the rear....i think 10mm sparer is very enough for you....
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