18s would be best but don't think they will clear your bbk.
EDIT - Sounds like there are a couple of options that would clear the 380.
08 E90 | Jet Black / Black | 6MT
Mods: RAC RG63 w/ Pirelli Corsa 255F/285R | Akrapovic Evo Exhaust | OEM Blacklines
Winter Setup: OEM 18s w/ Nokian Hakkapeliita R 245/40-18
Last edited by signes; 07-31-2010 at 08:29 PM.