question about width of SI diva gel flow

[KnottedYet]

I'm afraid I still don't get it. Just perching no problem, (I'd like to see you pedal on that bench. ) but when you start to move won't that too wide saddle still get in the way? Your saddle is like two inches bigger than mine. That extra inch on either side has got to get in the way.

Veronica

I could pedal on that bench, and I bet the cars would give me my passing space!

What is that inch going to get in the way OF? Nothing moves from the contact point of the ischial tuberosities on back, and nothing is moving on the sides (the hip is flexing and extending, not abducting and adducting)

I have two pelvis models (one male, one female) that I use when I am doing bike fit education presentations. I also have an articulated skeleton. They are great for showing people where the bones are, where things move, and where the saddle should be. If you can get a hold of a skeleton (or just a pelvis) put it on your saddle and look at how it works mechanically. It's very cool!

I just perched my sit bones on the edge of my kitchen chair. I could move my hips through the full range of hip flexion and extension that I'd need on the bike. The 16 1/2 inches of chair did not get in the way because it was behind my hip joints. That's 8 1/2 inches wider than my saddle. It could be 8 1/2 feet wider than my saddle, and it still wouldn't bother my hip motion.

http://en.wikipedia.org/wiki/Human_skeleton Sit bones and hip joints are in two different places. Support the sit bones without the supporting matterial getting in front of the sits and so getting in the way of hip motion, and the world is your oyster!

ETA: here's an even better self-exploration- sit on your spread hands. "March" your legs up and down. Feel how the limb motion is all in front of your sit bones? That's why saddles work, they are supporting the non-moving portion of your heinie. They can be 6 feet wide aft of the sit bone contact and still not interfere with the hip going through the pedalling motion.