Frame crack unusual ?

black lightning 1987

Moderator
Staff member
I've not seen that previously. Wondering if it could have been full of water and frozen? Water can get into the stay via a vent hole in the seat tube, but I think the lower end of the stay is water tight.
 

black lightning 1987

Moderator
Staff member
What are you going to do with it? I suppose you could ride as is and keep an eye on the damaged area. I might try making a patch out of 6061 and bonded with epoxy.
 

black lightning 1987

Moderator
Staff member
The problem with welding is that it would soften the weld area/heat affected zone of the tube. Guessing that it wouldn't be a problem on the seat stay though.

How did you build it and what's the intended use?
 

MEENI

Well-Known Member
You could put a busching around it on both sides
When painted blue it looks even on both sides
No welding needed just glue it on
 
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