by debra » Tue Jan 17, 2012 8:49 am
Trent,
Not only did BMW use several different brands, they also used several different size depending on the wheel package.
245/40-18
265/40-18
245/35-19
265/35-19
On they 19" wheels they used the following makes and models as original equipment.
Michelin Pilot Sport PS2
Continental ContiSportContact 3
Pirelli PZero
And I am sure there were other variations as well.