Those are great photos and explanation Blackstridaaustria, I do view your first point a little differently though,
The different size of wheels will make a difference as to the distance from the saddle to the ground but it does not make a difference in the distance from the saddle to the pedals and hence the riders leg extension. I think Strida use the same numbers for the two wheel sizes because they are only considering leg extension and not the height of the saddle from the ground. Do you think this might be possible? Also you are right about a dealer adjusting the seat, I always try to adjust the seat before I let someone ride a Strida for the first time, because you don’t get a second chance with someones first impressions.
Bill Wilby stridacanada.ca