Originally Posted by
JohnDThompson
Agree; the weld looks solid. A failure at the bottom of the seat tube is unlikely to be catastrophic; it'll just feel like the bottom bracket is adjusted too loose. Ride on and keep an eye on it for cracks developing.
This is a very common failure point on steel frames -- been there, done that with my 1971 Nishiki Competition, on which the seat tube lug broke away from the BB shell after 20 years and 40k miles of use. This is definitely NOT a safety issue -- I merely heard a creak on every turn of the crank and felt a little slop through the pedals.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069