My experience is that most French bikes with 531 butted seattubes, including the PX-10, have one of three seatpost sizes: 26.2, 26.4 or 26.6. I've seen several of each, and can't really say which is the most common, even for a given model. May have varied year to year, or maybe just by who was finishing that particularly frame, and what sort of mood he was in that day. Not sure I've seen a 26.0 PX-10, but it was definitely a size used on some French bikes "in the day". Rather strange that the seatposts varied so much, you'd think the bike manufacturers would standardize it better, if nothing else to make it easier to manage seatpost inventory.
Regards,
Jerry Moos Big Spring, TX
Tom Hayes <hayesbikes@gmail.com> wrote: Were there variations in seatpost sizes for PX-10's? I have had a few, but the current one has a 26.0 seatpost size, and most that I recall were eithe r 26.4 or 26.8.
Did the sizes correspond to different years of manufacture? I am pretty sure that the current one I have, with a 26.0 size, is late sixties.
Thank you.
Cheers.
Tom Hayes Chagrin Falls, Ohio (where it was seventy yesterday, and thirty-five today)