Originally Posted by
Germany_chris
I think my gas pipe Surly's are probably more durable than "high quality" steel form the boom era
Who the heck knows, right? If I had to bet on which bike would last the longest, my money would go on the fillet brazed Schwinns.
https://www.sheldonbrown.com/schwinn-braze.html
Those bikes are way overbuilt but that was Schwinn's DNA. Those bikes were built straight gauge chrome moly, fillet brazed, and they had an internal sleeves (a sort of butting). Plus the forks were built strong since they take an .833 stem and use a thicker steerer tube. Those are beautifully built bikes but you do pay a weight penalty for the bike.