Originally Posted by
Iride01
I've never used an assometer in a bike shop. What is the number it's telling you? The recommended saddle size or the spread of your sit-bones? Saddle size is usually the widest outer measure right? We don't want our sit bones on the edge of the saddle.
Your ischial tuberosities don't have much to do with saddle width, and the outer width of the saddle has little to do with how wide the seating area is. Some saddles flare out very wide while not actually being very wide on top.
Which is why I used the ankle and shoe analogy - the only part of the body you should care about is the actual part you're using, and the only part of the saddle that matters is the part you can sit on.
This is an illustration from my website, but the basic principle is true for any two saddles you want to compare the saddle on the right is wider in max width, but narrower in use. "Sit bone" in this case refers to whatever pelvic bones you're sitting on, rather than a specific bone.
