I think BMW were just as bad when they started to fit run flat tyres, their selling point was that it would take you 50km on a punctured tyre to enable you to reach a garage. The test drive was hard and no comparison with my existing model. It wasn't until I pressed the salesman that he told me that the tyre would then have to be replaced! The cost of a new tyre was over £200 at that time.
It was then that I went to a dealer in another brand and like many others came up against the no spare wheel problem, with a valiant attempt by the salesman to explain "by the law of averages your chance of getting a puncture nowadays is............."
Later on after agreeing a purchase price we were about to finalise the deal when I threw my spare wheel concerns into the equation with the comment "by the law of averages another dealer would....................." He supplied a free spare wheel!
My point? You buy a product, go for what
you need.

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