[martinf79]

UPDATE - okay, so I went to the dealership to measure the fender gap on a F30 335i Sport w/ Sport Suspension + 19" stock rims (should be same suspension drop + rim size as M Sport rims/tires).

Found out that the best way to measure fender gap is to tape a quarter to the end of a piece of tape (like 12" long) and tape it to the edge of the fender and let it hang. Then w/ a ruler, simply measure the furthest point of the tire wall to the piece of tape.

Turns out maximum fender gap is 12mm front and rear. For those experts out there, should I then go w/ a 10mm spacer (as I'm thinking going w/ 12 mm would mean it would be right on w/ the fender and still hit, or does the suspension compress into the car, and a 12mm spacer would still clear???).

Would appreciate any insight from those that have done this before. Thanks.