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      12-30-2012, 03:58 PM   #1
jc824
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Wheel size offset help

Was planning on purchasing aftermarket rims for the winter setup.

The rims have the following specs:
Rim Spec:
5x120
ET 15
18x8.5JJ

Was planning on running 245/45/18's for tires square.

Would this fit ok with this offset vs the OEM 29 and 23 offset? Or is the difference too much?

Also, what would the max/min offsets likely be so that spacers are not required? Could not find any info on min and max offsets that may fit without modification.

Thanks!

Last edited by jc824; 12-30-2012 at 10:49 PM.
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      12-31-2012, 06:19 AM   #2
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The 18x8.5et15 should work fine on the F and R for a winter setup. However, your tire size is not correct - you should use a 245/40-18 instead of a 245/45-18.
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      12-31-2012, 10:55 AM   #3
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the tires that they come with will be that size.. will I have any issues with 245/45/18?

or will it rub?
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      12-31-2012, 11:08 AM   #4
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Quote:
Originally Posted by jc824 View Post
the tires that they come with will be that size.. will I have any issues with 245/45/18?

or will it rub?
A 245/45-18 is 1" larger in diameter than the stock 245/40-18 - TireRack recommends < 0.5" change in diameter. Rubbing might be an issue when turning the front wheels - tire may rub against the fender liner. You may also run into DSC, TC, etc issues with the significantly larger diameter tire.
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      12-31-2012, 11:49 AM   #5
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I was just told that they came of 2010 M3. Maybe I should stay clear if they rub at the front wheel

Anyone ever try 245/45/18? Where there issues at the front?
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      12-31-2012, 04:08 PM   #6
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Quote:
Originally Posted by jc824 View Post
the tires that they come with will be that size.. will I have any issues with 245/45/18?

or will it rub?
That is a 26.8" tire which will be way to tall for the front. Really can't go above 26" for the front.

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