Originally Posted by
miamijim
The advice regarding fixed cup threading is backward. One removes a (left-threaded) English or Swiss fixed cup by turning it in the [b]same[b/] direction as one pedals the bicycle forward. One removes a right-threaded French or Italian fixed cup by turning it anticlockwise, as in backpedaling.
Data point: my 1980 PKN-10 was definitely Swiss-threaded, and the fixed cup was gold colored. I forced in an aluminum English-threaded fixed cup about 10 years ago when I converted to a triple chainring and Sugino crankset, and it has worked fine. At 34.925mm, the 1-3/8" English cup diameter is actually a tad
smaller than the French/Swiss 35mm size.
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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
Last edited by John E; 11-08-07 at 09:37 PM.