Changing Angles is an interesting site concerned with analyzing various aspects of skating. Regarding the geometry of skateboard trucks the author is very thorough. What I didn’t find yet is where he discusses horizontal bushing compression, which appears to be part of the feel of a truck – hence “wrong” pivot axle/cup angles and large kingpin holes in the hangers as a design landmark for decades. Trying to force this design into a non-slop one will eventually destroy the pivot and cup, as he already documented himself (see figure about spherical bearings).

Binge watching so much gold in these. Starts with Bruce Jones, who shaped one of my two boards. The other one is an early 1970s Nipper Williams from Australia.