Originally Posted by Eelesy24
It is fine to mix them front and rear.
I work in a BMW dealership and recently we had a customer who wanted to know if swapping to non run flats was approved, and as we couldn't give a definitive answer we emailed BMW technical, and their response was yes it is fine and they said the best way was to swap in stages, with the rear axle first, and then the front at a later date.
This seems a very strange response from bmw. Ok, some people say its fine and others disagree. But what is the reasoning behind saying the "best" way to do it is rear first then front later.
Surely the best way would be all or nothing? Why dont they send the cars from the factory with different front and rear setup if thats the best way?