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      03-13-2007, 12:20 PM   #21
Lieutenant Colonel

Drives: 2013 BMW X3 35i
Join Date: Oct 2005
Location: Calgary

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Originally Posted by d3l0n View Post
umm.. can some one carefully explain to me how the car's suspension is built for these tires. I kinda get it to a certain degree. I guess at a general sense, not too detailed. in the explaination, explain the comparison with a car who's suspension is built for non-rft. (sorrry for the essay question)
It was mentioned above... basically BMW use softer damping rates and bushings, etc. to tame the effects of having a practically rigid side wall that run-flat tires have.

Cars made to run with non-RFT tires will assume a certain level of tire side-wall flex in design and can therefore use stiffer versions of some of the other suspension components without compromising ride quality too much.