By the way, does anyone know if it might be possible to insert a 25.6mm seatpost into this Urago? I had a 25.5mm as measured with calipers that I tried and it was a snug fit. That seatpost is on another bike so I am looking for something and saw an Ideale steel seat post ( 25.6mm ) that would be nice to use. It seems that either 25.4mm or 25.6mm are more common and I have been trying to find out what the inside seat tube diameter is for Durifort, as it would seem to be what was used back then.