Joined: Jan 2019
Posts: 2,040
Likes: 1,073
From: Toledo Ohio
Bikes: 1964 Huffy Sportsman, 1972 Fuji Newest, 1973 Schwinn Super Sport (3), 1982 Trek 412, 1983 Trek 700, 1989 Miyata 1000LT, 1991 Bianchi Boardwalk, plus others
I suppose racers of the 70s and 80s had a pretty good idea how many on off cycles the crank could withstand. Consumables for them. Maybe cottered cranks held on for a bit, as I would assume they were much more durable with just cotter replacements.