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      12-15-2020, 04:47 PM   #18
Tambohamilton
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Drives: E91 330d
Join Date: Apr 2019
Location: Wiltshire, UK

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It's actually completely standard in passenger cars, using a long bump stop sort of as a tender spring. It allows the boffins to inexpensively create a progressive (rate increases with bump) wheel rate, which allows a better (or at least, tuned/tunable) balance between comfort and body control. But it also hugely affects 'magic number', which is the ratio of front roll rate to total roll rate... Most manufacturers will use it so that in docile driving (low speed cornering) the car has very neutral handling, but the harder you turn (and therefore the greater the body roll) the higher the magic number, which results in greater understeer. So it gives the effect of very predictable, progressive understeer.

But yeah, disintegrating bump stops will make your car feel like crap!