Originally Posted by AlterZgo
BMW runflats are expensive... much more expensive than buying non-runflats. So if you get rims and non-runflat tires and keep your stock rims/tires on the side, when it's time to turn the lease in, you just put back your stock rims and tires with 100% tread and you're good to go.
OTOH, if you use up more than something like 50% of the tread on your expensive, stock runflats, BMW would likely charge you for a set of new tires.
m3s do not use run flats!!