Originally Posted by
John E
My 1971 Nishiki Semi-Pro frame failed at the 20 year, 40K mile mark, when the seat tube socket broke away from the remainder of the bottom bracket shell. Too many hill climbs, many out-of-saddle, I guess.
My 1973 Peugeot UO-8 frame failed at about the 30 year mark, when the drive side chainstay cracked between the chainring and tire clearance dimples.
My first 1960 Capo (a Modell Campagnolo) frame failed at the front of the downtube, just behind the butting, at the 25-year mark, but I won't count this one because the frame had been bent back and re-straightened, giving me a few more years.
I bought my 1988 Schwinn mountain bike (see signature) from a San Diego firefighter for whom Schwinn had replaced the frame under warranty after about 2-3 years of use. I have had no problems whatsoever during the ensuing 25-30 years, but I am lighter and less strong than he is.