Looking at frame geometry charts, it seems that all frames from the smallest to the largest, are built the same height off the ground (ie bottom bracket height). There is less than1cm difference between a tiny women's frame and a clydesdale and that distance is set to be correct for a medium frame.
Would it make sense to select a crank size proportionate to the leg, then design a BB height to give safe cornering clearance. This would mean that every rider has their pedal at the same height off the ground, but the BB would vary by several cm depending on their size.
If you look at v small frames, you see riders with the saddle and BB way too high off the ground. Imagine scaling up the smallest size to the largest with a proportionate BB height. (ie increase every dimension by 50%), It goes from 26.6 to 39.9cm
Last edited by MichaelW; 10-23-04 at 07:21 AM.