Originally Posted by
Kontact
My take on crank length changes is that you are still pedaling around the same center point, so there is no reason to change your saddle height or set back. Any change you make to satisfy one part of the pedal arc is just going to make another part twice as far off.
What might be slightly interesting in this context is that this is a custom bike, where everything seemed perfect, except the builder's recommended saddle height. I've always had to keep it a bit lower to be comfortable, but had the sensation that it was too low. However, it caused pain when I raised it to the recommended position. Now it is within 1mm of the recommended position (which is as close as I can measure it, realistically). If I had added an additional 7.5mm to the recommended height to compensate for the shorter cranks, it would have been impossible to ride with stability.