The 18x8 ET30 wheel will extend out 11mm beyond the 18x8.5 ET47 wheel. That's 1mm inside of the 8.5" ET35 wheels that I have that are pretty damn flush on an F30.
Look at it this way: the 8" wheel surface will pull in 6mm on each side because it's a half inch narrower. Then, you're pushing it out 17mm as the offset drops from 47 to 30. 17-6=11mm add'l poke.
Quote:
Originally Posted by ska///235i
thanks,
can you help me out with this? So lets say that the oem rear size is 18x8.5 with ET47. I'm going to get a wheel that's 18x8 ET30...what is the difference here (lets say by MM)? Is the wheel more inside or out?
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