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100% my own idiocy that caused it... on the underside of my frame there's a cage mount, one of the bolts was cross threaded (with a bottle cage attached) and couldn't get the bolt out, so I drilled the head off (to get the cage out of the way)... then I used some mole grips to try and twist, what's left of the offending bolt, out. Now the the whole thing spins freely within the frame...
Please offer advice/abuse as required 👍🏻
drill the whole thing and use a rawl plug in the hole?
super glue
Riv Nuts?
Do you mean the threaded boss is still there but just loose in the frame? Should be able to tighten it up..
Edit: ah, I guess you mean the remainder of the bolt is still present? If so, as above.. drill and new rivnut.
I'll leave this here anyway in case it helps anyone else:
I'd probably cut the flange off the exterior part of the boss, push it into the downtube, then remove the fork and rattle bolt out through the big hole at the headtube junction. Then install fresh rivnut.
LBS fixed a similar issue with a riv nut thingy, was metal frame, unsure amount carbon.
Lasers?
Good stuff to be looking at in here... will digest a bit this evening.
New frame ordered just in case, I'm sure my wife will understand 👍🏻
Super glue fixed mine. Runny enough to get between frame and rivnut.
I'd try to splodge some epoxy in the gap if possible. I wouldn't try compressing the rivnut any further just in case it damages composite in that area.
Super glue sorted mine on an ally frame
Wot shark attack said.
I did something similar a few months ago on my carbon road bike, tried to tighten a loose bottle cage bolt and it was seized. Cut the head off (between the cage and the frame) and then panicked! Tried cutting a slot into what was left of the bolt to unscrew it but it was corroded in place and I made a right mess.
In the end I drilled it out and it was much easier than I thought it would be. Even with the mangled half bolt still there the drill bit was pretty much guided by the old rivnut so the inner popped out and into the down tube, the outer ring of the old rivnut came away with a gentle nudge.
Took the fork out and rattled the old rivnut out, then fitted a new rivnut with a little epoxy between the rivnut and the frame (recommended but not critical). End result was good as new, I was tempted to drill out all the others and put in new but decided not to temp fate.
Long story short - pretty easy one to fix yourself.