Joined: Jul 2002
Posts: 40,863
Likes: 3,115
From: Sacramento, California, USA
Bikes: Specialized Tarmac, Canyon Exceed, Specialized Transition, Ellsworth Roots, Ridley Excalibur
Rather than get out my TI-30, I just use a tape measure and measure from the center of the BB spindle to the center of the saddle rail. As I move the saddle forward, I have to raise it up so that it's the same distance.