Hamster, I don't know where you got that, but I certainly never heard anything like it in the 50's and 60's. I rode a stage race in 1956 with 3 chainrings and a 6 speed block. Try and find a movie of Rene Vietto, who charmed the french with his 120 RPM climbing pre war and early post war, pity his career was spoilt.
If I had a 28t chainring I would have stripped the threads.
Keith.
If I had a 28t chainring I would have stripped the threads.
Keith.