Frame repair; crack where the chainstays meet the bottom bracket.?

Had a old Colnago that did the same thing.

"columbus" suggest theat the frame is Probably a cormoly AX ,SX or SPX tubing.

The frame COULD be repaired by taking it to a Brazer(a special kind of welder(but not really welding) who would Heat the flanges of the bottom bracket(that hold the chainstay) to remove the chainstays and then replace it or them with new one(S) (I actually had this done twice back in the 80's)

that being said, I strongly suggest not doing this! any brazing done after the bike was originally made actually weakens the whole rest of the frame!(Hence the reason I had to have it done twice!)

on top of that , not one brazer that is willing to do this work will warranty the work(too much risk of failure and liability)

my suggestion is to take the parts off the frame and get a new frame. then make the old frame a piece of artwork!

Knowing what frame/bike this is would make this question easier to answer. Just saying "Columbus" doesn't give the whole picture. Columbus made tubesets for Specialized in both steel and aluminum alloys through the years. Generally, such a repair is feasible on a steel frame. If it's lugged steel, he'd be looking at replacing the chainstay, since welding the crack in the tube could create more heat than the brazing at the lug could handle. If there's nothing special about the frame, it may not be cost effective in any case.

Stewies dad has it this time. If the frame is lugged steel it can be repaired by replacing the chainstay. If it is aluminum it can't be repaired. If you really want to know why edit your question to ask this and I'll give the long answer.

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Your local Specialized Dealer may warranty the frame if he is the original owner.

Absolutely NOT ok to repair this! Ride this at your own risk and personally I wouldnt ride it even if it was repaired!