OK - I'm still confused. What I'm reading is that the 375 is the biggest style. But, they are 21X11.5 just like the rest of them. http://accessories.bmwusa.com/ItemVi...productId=3193

I've seen a few X5 (not often) that have humongus wheels. I see them from the back and it looks like the wheels belong on a Lambo or something. Those are the sizes I want.

Also, isn't 21 a wierd size? Aren't 22s mroe common (easier to find tires)?