Overhauling a vintage specialized tandem bike. Old derailleur hanger is attached by these two
…rivets?…. As they were, it had significant play; you can see some evidence in the photos. Whether that was design or time and erosion, I don’t know. But when I re-installed the RD one of them snapped (see pics). These things are original, like, powder coated the same prince-ass purple as the frame from 1993. Can these be replaced with some nut and bolt? Or can this only be re-made by some craft that I do not here possess?
by biolegeyes
5 Comments
I should add that this bike is precious to me…
I’d pop a regular rivet in there honestly. Quick and easy. It looks like that’s how they did it before and it wasn’t intended to be removed apparently. Just find some rivets with the correct sized head that’ll fit nicely into the recess.
https://www.rodbikes.com/articles/derhanger.html
Is re-installing a rivet not an option for you?
I would think nut-and-bolt can work here, just make sure the bolt fills the hole well to prevent lateral movement. Also see what’s the lowest-profile nut you can find to avoid protruding out the other side. Maybe one of those flat, square nuts found in consumer electronics (M3 or M4).
I would use a small head bolt, putting the nut on the outside. These rivets are weak.