When I got my X3, it was CPO, and there was some confusion at the dealership about getting new tires on it. In the end, I ended up being given a set of Summer performance run-flats.
*** Update:
I sold the front tires locally through Craigslist. The rears are still available. They are 275/40-19. They are brand new with stickers still on them, never installed. The rears run about $305 EACH from Tire Rack + shipping.
I would be OK keeping them and getting a 2nd set of wheels but thought I'd free myself of the effort and try to sell them first.
Pickup preferred but will consider shipping them under the condition that we can mutually figure out how to do so cheaply and that the buyer pay for the actual shipping costs.