Originally Posted by micmat

Setback is measured from the saddle tip traditionally,but I wonder why.
I have recently switched to a shorter nose saddle---given that I spend most time on the back 1/3 of the saddle,it seems to me logical to measure from there,in order to get the same relationship to the crank.
In fact some saddles have no nose at all---not that I would use one,because you do sometimes need to slide forward.