Originally Posted by Mako
I just checked my new 335i and it has the S001 Potenza's.
One interesting thing is that the rear are 255/40 on mine, but I think OEM on the M sport is 245/40... Strange that BMW would run 255/40 from the factory if that is the case. Tirerack.com shows 245/40 as standard rear M Sport staggered.
Stock sizing is 225frt and 255rr if you go with the summer tires.
TireRack shows 225/255 as OEM. Click on the "optional" tire sizing for 18's or 19's and it will show you.