Quote:
Originally Posted by swamp2
Expand on this, please! Details, details! THX.
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All BMW models that have runflat tyres have their suspension tuned for the substantional additional unsprung mass that the runflat tyres add to the vehicle. It's a tradeoff, trying to make the car handle like a BMW even with runflats under it. When you suddenly take off your runflats, and change them to regular tyres, your suspension is still tuned for the runflats, and is not optimal for regular tyres.
M models on the other hand are the only BMWs left that come with regular tyres, thus their suspensions are also tuned for them.
Best regards,
Jussi