For the E82/E87 1 Series, we recommend the following fitment:
18" Staggered Fitment
F: 18x8.5 ET45 Profile 1 - 235/40/18*
R: 18x9.5 ET58 Profile 1 - 265/35/18
18" Square Fitment
F&R: 18x8.5 ET45 Profile 1 - 235/40/18*
*Customers running KW, Ohlins, or other conical style spring coilovers will require a 5mm spacer up front to clear the suspension, and then negative camber up front in order to clear the fenders.
Customers wanting to go with a more aggressive tire setup can run 245/35-18 tires up front, but that will require a 5mm spacer and negative camber to be dialed in. A 275/35-18 tire can be used in the rear with a fender roll and/or negative rear camber.