I have a few guys running 15mm in the front with no rubbing issues. For the rears the largest any of my customers has gone is 12.5mm and he reports the same awesome fitment as alex. HERE is a link to our 15mm spacers, HERE is a link to our 12.5mm spacers for the F10. These spacer kits also include the necessary extended lug bolts. In case you'd like another size, HERE is our selection of spacers for the F10 535i.