We discuss these seatposts on theCR list about once per year. Here is the relevant archives search result:
http://search.bikelist.org/
They're reasonably solid, as you will see...
Best regards,
Fred Rednor - Arlington, Virginia (USA)
> From: Jon Spangler <hudsonspangler@earthlink.net>
\r?\n> Subject: [CR]Info on a JPR French setback seat post?
\r?\n> To: "Dale Brown" <classicrendezvous@bikelist.org>
\r?\n> Date: Saturday, August 9, 2008, 6:26 PM
\r?\n> Has anyone on CR (besides Tony Colegrave, who sent me the
\r?\n> following)
\r?\n> ever seen a JPR seat post, or know anything about them?
\r?\n>
\r?\n> I received the following encouraging news from him after my
\r?\n> CR
\r?\n> inquiry about setback posts, but cannot locate any info on
\r?\n> JPR as a
\r?\n> brand so far.
\r?\n>
\r?\n>
\r?\n> >If you're interested, I've got a straight
\r?\n> seatpost with a fair
\r?\n> amount of setback (at least 2cm.); it's French (JPR -
\r?\n> fluted alloy,
\r?\n> probably from the 'seventies), >and therefore
\r?\n> entirely suitable for
\r?\n> an Ideale saddle (indeed, it's got the mouldering
\r?\n> remains of a Model
\r?\n> 90 attached to it at present), but you'll need to
\r?\n> >consider the seat-
\r?\n> tube I.D. of the frame with which you might want to use it
\r?\n> - this
\r?\n> seatpost is 26.2, which is a fairly common French frame
\r?\n> size, I
\r?\n> think, but >not too common elsewhere?
\r?\n> > Regards, Tony.
\r?\n>
\r?\n> If I have a frame that needs a 27.2 or a 26.4 post, are
\r?\n> there good-
\r?\n> quality shims that might work well with the 26.2 post to
\r?\n> get my
\r?\n> beloved Ideale alloy-rail saddle back on a bike?
\r?\n>
\r?\n> Thanks to all the responses about cranks--I want to use a
\r?\n> compact-
\r?\n> style double European crank, if at all possible, and have
\r?\n> more info
\r?\n> to work with now.
\r?\n>
\r?\n> Regards,
\r?\n>
\r?\n> Jon Spangler
\r?\n> Alameda, California USA