Just had the same problem with a bike that I built for my son. Brought the bike into an LBS and discovered that the seat tube was out of spec. It was 27.4 instead of 27.2. They cut a shim for me as a temporary fix and it didn't work, even though it was the right thickness of .2 mm. Fortunately, they make 27.4 seat posts and I got a hold of one but that even slipped. Then I changed the seat post collar from a fancy thin titanium type to a wider one and cinched it tight. Voila, finally the seat post didn't budge.
On Mon, Apr 27, 2015 at 7:17 AM, Kevin Lindsey <lindsey.ke...@gmail.com> wrote: > Just finished building my Hunqapillar over the weekend and rode it 20+ > miles to work this morning. Although still too early to tell, it has "my > very favorite bike" stamped all over it. > With one possible exception: I can't get the seatpost to stop slipping > down. Despite tightening the bolt to so hard that the allen hole is > starting to strip, it still inches down as I ride, and we had to stop six > times on the ride in this morning to raise the seat back up. Very > frustrating. I had thought that maybe the brake cable hanger was > interfering with the seat tube somehow, but I don't see how that can be > avoided, given the shape of the hanger and the fact that it has to remain > attached to the seatpost bolt. > Has anyone else experienced this problem? > Best to all, > Kevin > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to rbw-owners-bunch+unsubscr...@googlegroups.com. > To post to this group, send email to rbw-owners-bunch@googlegroups.com. > Visit this group at http://groups.google.com/group/rbw-owners-bunch. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
