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      08-27-2010, 05:04 PM   #20
Giff
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Drives: E90
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Quote:
Originally Posted by doughboy View Post
what do you mean?

a car rests on its springs, the height is set by the rate and length of the spring.

shocks don't effect ride height.

m sport springs give a 15mm or so drop from standard. that doesn't mean the spring is is 15mm shorter as it has a different rate so we don't know how much it compresses.
Spring perch, can be a different height.

For example Bilstein shocks often have a lower spring perch, fitting them with std springs will give a lower ride height.

Several other aftermarket manufacturers offer shocks with an adjustable perch to allow variation of ride height.

On reflection, if Eibach quote a 25mm drop on an SE and 15mm drop on an M Sport then it would be logical to assume that the difference is in the springs and not the shocks.
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