Originally Posted by
unterhausen
My fixture includes the front axle position, .
Yes, that's a whole different thing. I should have stated that my primary assumption is the Tanner/Arctos type of fixture where the bottom of the headtube is near even with one of the main spine. Mine actually sites a couple inches in front of one end. There is also an assumption of the arrangement of the rear axle holder and how much of the spine is needed for that.