See the following post (
http://forums.5series.net/topic/9334...s-for-the-f10/) - info extracted below:
"According to BMW Nordic the ET's for the new F10 wheels are
18" Style 329 and 330.
F 8 x 18 ET 30 (tires 245/45)
R 9 x 18 ET 44 (tires 275/40)
19" Style 331 and 332.
F 8,5 x 19 ET 33 (tires 245/40)
R 9 x 19 ET 44 (tires 275/35)
Thanks Ari"