E36 has massive arches? Therefore You need wide rims to accomplish "stance".
If trying to copy the vw fanboy kids then fair enough. Its about having a bit of dish as well. So stretched tyres on a skinny rim will look like your running space savers. No matter what the offset.
My experience. Many many friends with old vws running stretched tyre. Unable to go over 50 cos it vibrates and cannot corner hard.
I have run bbs rms in 9.5 with 215 and 8.5 with 195. It made my car crap. I put my three piece 7.5js back on and now i enjoy throwing my car about.
when you stretch a tyre you lower its load rating, therefore imo unsafe.