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      12-04-2018, 04:14 AM   #4
HighlandPete
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Drives: BMW F11 535i Touring
Join Date: Mar 2007
Location: Scotland, Highland Region

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Quote:
Originally Posted by cdgatti View Post
I see in the spec sheets for the new car that getting run flats or non-run flats will remain an option. Has anyone read whether some suspension components will be different to accommodate the different tires?
I see where you are coming from, would appear to be necessary in the fine tuning of suspension/tires. But no chance of different settings/calibrations, IMO. Years ago RFTs were so different in characteristics to standard non run-flat tires, we could feel a big difference in driving characteristics when we changed tire type. Tire characteristics are not as extreme these days, with vertical stiffness being much closer to each other.

Think about it this way, BMW do not change suspension calibrations for different wheel size options. BMW setup the chassis for the standard fit wheel size. I'd wager changing from 18" to 20" rims will be as big a change, (maybe more) as comparing a run-flat to a non run-flat of the same size.
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