Hey, I rarely post on here but I thought I would post an update on my 18x9" 245/40 front, 18X10" 275/30 rear Apex ARC-8/Nitto Invo, H&R spring set up for the benefit of Z4M Kind.
I have been happily running the set up for two seasons. Last season I had no rubbing issues of any kind front or rear even at the track. This season the H&R Springs have settled enough that I am getting very slight rubbing on the outside rear tires on the track. Normal aggressive street driving however is not an issue. I was planning on dropping down to a 235 f & 265 r set up anyway due to my opinion that the 275 are more tire than I need and I am always looking to reduce unsprung weight. I am sure that this will fix the issue.
Hope that info benefits someone out there considering this set up.
Cheerio.