Thank you to everyone who replied with ideas/suggestions.
@Jeremy: The seat lug extends about a millimeter above the seat tube and
the seat tube is seated under a short lip at the top of the seat lug. For
now, the crack is isolated to the top of the lug.
@George: I am not the original owner. FWIW
Where are you located, Logan? Maybe someone will know a builder or repair
service near you, that they can recommend.
It sure looks like a crack to me, and I too would guess that the most
likely cause was a too-small seat post. I also like Christian's idea: If
you're lucky, perhaps a small
Amateur framebuilder here...
Id drill a hole to stop the propagation of the crack then TIG weld to fuse
the crack. grind smooth to finish. I would try that first before replacing
the whole seat lug.
"If my understanding of frame construction is correct, that also means the
top of the seat tube
Are you the original owner of this Quickbeam or did you buy it used from
someone? If the latter is true it may be that the wrong diameter seat post
was initially used and thus the seat post binder bolt over tightened to
accommodate.
On Wednesday, January 24, 2024 at 1:07:41 AM UTC-6 eil...@umi
Replying not as a frame expert, but I did work as a mechanic for a while
and was often customers' first line of inquiry about frame issues. Take my
advice with a grain of salt. The only authoritative source of information
on this would be a framebuilder who has been able to inspect the frame in
