Quote:
Originally Posted by KAR120C
There are definitely a lot of variables. That's why I was very specific. If I can hear from people with the wheel and tire size I'm looking at, then for a given offset the variables drop to 1) the very small differences between individual cars' stock camber and ride height (which I'll overlook), and 2) the tire type. That's why it's important to me to hear the experiences of people actually running the set-up! If I hear the Corsa's fit like on your buddy's Dinan car, but something wide like a Potenza Sport rubs, then I have good data to work with. If I hear that Titan7's work great with the Potenza but not the Corsa's, then that's good data, too.
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TL;DR = 9.5 +27/+28 on OE suspension with 265/30/19 fits w/o adjustments or modifications. If you upgrade suspension w/camber plates just go 9.5 +22.
Like was mentioned, if you want a 265 front you’ll likely need the 9.5 wheel to have between +22 to +28 offset. Apex has mounted the 9.5 +28 and it's sold as a direct bolt on for OE suspension with 265/30 MP4S or R888R, which can be viewed on their F87 Fitment Guide page.
The 9.5+22 might require some additional camber compared to stock, at around -2 or -2.2. I forget what is possible w/o camber plates but recall seeing it work with a 255/35 and no adjustments.
From my countless hours of researching the forums and speaking to people and checking their setups in person I would go with the 9.5+27 or +28 from Apex or Titan, unless you're going with aftermarket suspension in which case you can fit much more tire/wheel.
For reference, using WillTheyFit.com and confirmation from Apex and Bimmerworld, 10.0 +20 fits front as it’s often ran square as a 10 +33 (with 12mm front spacer) even for those on Ohlins, but you need to add negative camber.
I know people have fit 9.5+25 with 255/35 on Ohlins.
Regardless everyone putting Ohlins on this car should always go for the 7” (180mm) front spring which is .87” shorter than the standard (200mm). Then you can increase preload a few mm if you need extra inner clearance.
I'm running a 9.5 +13, which has almost identical outboard/fender clearance as a 10 +20/+19 wheel, with a 265/30/19 on Ohlins with the shorter 7" spring and -2.5 front camber, with only 5-10mm front drop, measuring top of front fender to bottom wheel lip at about 24".
Here's some pics of my Ohlins with OE wheel/tire set up (788M 245/35) with above ride height. 13mm = half inch. Image w/measurements is OE, and image with more space and no measurements is 9.5 +13 clearance 265/30.