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      03-21-2019, 04:26 PM   #13
jns_e85
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Drives: '05 X3 2.5i, '06 z4M, '17 M2
Join Date: Feb 2014
Location: Chicago Area

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Quote:
Originally Posted by jteran5 View Post
On an 18", a 255/40 would be the same height as a 225/45
No dispute there. I thought the same as you when I bought my tires (same height, they should fit!) just to find out they would not work. I would add to my previous statement, more girth at the top caused my issue.

You may have missed it, but the listing you posted states "front negative camber required". Unfortunately, APEX does not say how much negative camber.

Earlier in the thread, I stated I needed more front camber to make it work. At the time, I was at ~ -2.3 degrees with camber pins pulled and 2 camber washers installed and yet, it did not fit. Given my experience, I would argue more than that is needed.

If you are dead set on 255/40, contact APEX to see how much negative camber they recommend is needed. Though I suspect you will need camber plates ($400+ for a set) to make that happen.

Given you are staying on stock suspension, I would recommend going 255/35/18 for the front like I ultimately did. A quick peak at TireRack at the PS4S shows that size is about $20 cheaper per tire anyways
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2017 M2 - Camber Hubs, MPE, and some other goodies
2006 Z4M - Epic Tune / Eventuri CAI / Euro Headers / Stromung / FA 500 / AS SSK / Arc 8s
2004 Z4 3.0i - Gone, but not forgotten!
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