[timhatimay]

I know people have done this size before, but this is quite an aggressive fitment for a 1. It may require fender roll and/or camber to fit a decent size tire, so maybe Tirerack didn't want to list it as fitting the car (the normal user may not realize the consequences of changing size/offset of the wheels). I'm aware others may have wheels with an 8.5 et40 on their car, but it will be a tight fit. If you are set on the Kosei, look up a 335i w/0 sport package and you should see the Kosei K1. Good luck!

Tim