||10-22-13 08:03 PM
Originally Posted by apetro3
Pubic bone height is 31 inches in bare feet. I'll have to check on my saddle height. How is that measured?
Two main ways: distance from the center of the BB spindle at the crank, up along the seat tube to the top of the saddle, and the maximum distance from the center of the pedal spindle up the same way to the top of saddle. The first way is more common.
Are you actually having any problem based on your saddle height? Most people who do have problems are looking to change a few millimeters at a time, yet you give the key measurement (pubic bone height) in round inches. Usually we're talking millimeters. Can you at least go back and measure it to a 16th of an inch? Then there would be some confidence of giving you some improvement.
Do your pictures show a seating problem? Maybe, maybe not. Should you raise it? Well, one guy with some experience says maybe so (me), and another with some experience says maybe lower it (chaadster). If you don't have any sense of whether you have a problem and no sense of the needs of the measurement, do whichever you like. Maybe you'll find a problem. Presently it's just academic.
Usually you take your pbh in millimeters and multiply by 0.883 to get the starting point. Some painstaking processes came up with that number, and it is 0.883 rather than 0.88 or 0.9 because the difference mattered in the testing that was done to assess rider efficiency and long-term comfort.
I'm trying to say, precision and accuracy make a difference. Telling us "it's 31" is rather useless. If a few millimeters matter (and the cycling science community thinks they do), then a 16th, and 8th, or a 10th of an inch matter. If you rounded correctly to get 31, you could be half an inch off. That's 12.7 mm, a big error in fitting and in optimizing comfort and efficiency.