I think I've gotten rid of the last of my one-bolt seatposts (but never had a Campy), but a fine "wrench" at an LBS in NJ showed me a good trick: disassemble the post, and trim a piece of reasonable sandpaper (say 80 -100 grit, or medium) between the two mating curved surfaces. Reassemble, tighten up, and ride. The sandpaper just is a matrix holding a few thousand new contact points - the grit- that help keep things from slipping any longer. If you don't tell, and trim is well, no one will ever suspect that your beloved Campgranolo (or Kalloy) was slipping. Someday I'll get desperate enough to try this on the infamous Brooks saddle clamps for straight posts, but the mating parts are steel instead of aluminum, so it might not work as well. Maybe with finer sandpaper?
Editorializing a bit, I've used lots of different seat post designs, some of which worked just great and others that didn't. I'm partial to the later (improved) American Classic two-bolt, and lots of other off-topic designs. It is sad that Campagnolo did two successive posts that had weaknesses: The early ("record"?) two bolt has driven many a wrench to drink, since it is really awkward to reach the bolt heads, and no place from which you can turn more than 30 degees if the saddle has flaps. So they replace it with the self-adjusting one-bolt, which doesn't even have the virtue of being original... But, I like their hubs and QRs and front derailleurs.
harvey sachs mcLean va usa +++++++++++++++++++++++++++++++++++++++++ Jerry Moos wrote: <snip> Did another 35K today on the Zunow. As befits a Zunow, it has a mix of Japanese and Italian parts, including a early Campy SR seatpost, one bolt but with exposed hex head bolt. Both yesterday and today the post slipped during the ride, such that nose of the saddle tilted up a bit more at the end. This happened today even though I thought I had tightened the bolt pretty darn tight after yesterday's ride. Is this a common problem with these early Campy SR posts? Anyone know the fix?
Regards,
Jerry Moos
Big Spring, Texas, USA