Caster shim question
Thread Starter
Burning Brakes
Joined: Jun 2011
Posts: 817
Likes: 11
From: lewisburg wv
Caster shim question
I was looking at the shim location on the A arms of my 1980 vette. The higher stack of shims are at the front. Wouldn't this be neg caster?
I thought they were stacked higher at the rear for pos caster.
I thought they were stacked higher at the rear for pos caster.
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
When the shims are added in the front that pivots the top of the a-frame to the rear which tilts the top of the spindle backwards; increasing the inclination angle (positive caster). Adding shims in the rear pivots the top of the a-frame foreword which tilts the top of the spindle foreword and increases the negative caster.
Shims need to go wherever they are needed to make the geometry correct so sometimes you'll find more in the front and sometimes more in the rear depending on how your frame came out after fabrication.
Thread Starter
Burning Brakes
Joined: Jun 2011
Posts: 817
Likes: 11
From: lewisburg wv
