I have the stock 20" rim on my 2015 650xi gran coupe. I took off the factory RFT they were HORRIBLE. I now have Fallkens on. I LOVE THEM not one issue with my rims at all. I plan on ordering this spare tire system and leaving it in the trunk. (link below) hope this helps
http://www.bimmerzone.com/BMW_Perfor...T-F12-KIT.html