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      03-12-2026, 07:37 PM   #19
DrFerry
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Drives: 2008 E92 M3
Join Date: Jul 2010
Location: Greenville, SC

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Quote:
Originally Posted by sperkins View Post
Thank you DrF! That's a very good highlight on the treadwear pattern. So more castor is leaning the kingpins back, correct?
BTW, i had the car corner balanced (and aligned) with a half tank, and a bunch of sandbags to simulate my weight.
Kingpin inclination is a term more often used with double A-arm suspension designs. However, it still applies to the MacPherson strut front suspension design of the BMW E9X. The Kingpin axis on the strut is an imaginary line that runs from the strut top down the body of the strut and intersects the ball joint. So by moving the top mount of the strut back towards the firewall, caster angle can be increased. In order to do this one would need adjustable strut top mounts.
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