[Gaz64]

Greg,

Rear suspension geometry has no characteristic that is defined as caster. A caster angle applies where the wheel pivots around a steering axis - the rear wheels don't do this (except for the small amount of movement that's used to adjust toe).

Unless you have 4 wheel steering.

And the only way to measure caster is to sweep the "steering" 15 degrees to left and right first.

Gary