Mark,
One additional idea you might want to try is simply slitting the sleeve, lengthwise, in the clamping area. This can be done cleanly, on the bottom (where loads are largely compression and benign). Using a tiny cutter on a milling machine would be best, but a careful job with a Dremel would also work. After this was done, the clamping force of the stem would transfer on down onto the smaller tube inside. You'd definitely want to keep an eye on things for the life of the bike, but we all inspect our bikes anyway, right?
I still think that gluing will do the trick...there's *so* much surface there that the loading will actually not be all that high, on a per-unit-area basis.
Some combination of these measures will certainly keep the bars on the road, but you'll certainly want to keep a close eye on them, for safety's sake.
Cheers,
Scott Minneman San Francisco, CA - USA
-----Original Message----- From: classicrendezvous-bounces@bikelist.org [mailto:classicrendezvous-bounces@bikelist.org] On Behalf Of Robert Schenker Sent: Friday, November 09, 2007 12:47 PM To: classicrendezvous@bikelist.org Subject: [CR]re: Slipping Cinelli bars
Mark--
If your bars are slipping, I would be very very circumspect about any workaround. If your bars really loosen up while on the road, you will have a really nasty accident. It will be sudden and unpleasant.
I haven't read all the posts on this topic. I see something about the sleeve being the problem. I would not trust any glue other than a carefully applied epoxy, and there is no way I can think of to get that in there. I'd hang those bars on a nail. Find something else to use.
3TTT made a really nice upright bar (I think that's what you have here). Of course, these would be 26.0--the Cinellis are probably 26.4, right? Also, they're out of print and hard to find.
Bob Schenker
Oakland, CA