Quote:
Originally Posted by Drifty//
I have ARC-8's in the 18x10 size, on a E92 with EDC. My 275/35R18 tires rub in front. I'm interested in the EC-7 in 18x9.5 ET35. With a 265/35R18 tire, has anyone reported rubbing? I feel this should be much safer.
Since I may need to upgrade the brakes, I'd really like a clear statement on exactly which 18" sizes will accommodate the Brembo 380 kit.
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All E9X M3 wheel sizes in the EC-7 design clear the Brembo 380 spacer free. Those wheel sizes are as follows:
18x9.5" ET22
18x10" ET25
18x10.5" ET27
18x11" ET25
18x9.5" ET35 should not need a spacer either on the E9X M3, but we do know it needs a 5mm spacer on the E46 M3 which has a shallower brake hat. The 18x9.5" ET35 was not made for the E9X M3, but it does work with a 265/35/18 summer tire as a very tight fit on the strut side. Extreme summer and r-compounds may touch the strut and require a spacer.
You said the fronts rubbed for you, and I'm not sure what that rubbed against, or what tire model you ran in that particular setup.
If you want to avoid front rubbing I would recommend 18x9.5" ET22 with 265/35/18 tires. That wheel would provide more strut and fender side clearance than the 10" wheel, and the 265's would make the fitment easier. I do not recommend the ET35 wheel.
Quote:
Originally Posted by davem3fan
So everything I've read thus far leads me to this proposed setup:
2011 E90 M3: Thus far, stock suspension.
Eventually planning Brembo 380mm Front Brakes
So if I want a square track-friendly setup where I run 265/35/18 Pilot Sport Cups, it sounds like the SAFEST bet is 18x10 ET25
A square set of 18x10.5 ET 27 would yield a non-optimum/non square German tuner stretch on a set of these 265/35/18 PSCs, correct?
I'm not going for Stanceworks, I just want a square setup with NO rubbing, and it is OK if they are not pushed all the way out. We've got no business trying to run that extreme on PA roads.
Thanks for the info Eddy and all thread participants.
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18x10.5" ET27 would be a problematic front fitment. The wheel would need a spacer in the front to avoid the strut tube, which would push it out further. 18x10.5" ET27 should only be used square on a dedicated race car. It would be prone to front rubbing on a street car simply due to the wider arc the wheel would swing from street use.
18x10" ET25 is the correct wheel size for a proper front and rear square setup. The 10" wheels will already provide more than enough sidewall support for a 265 PSC.