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Old 12-01-20, 03:33 PM
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John E
feros ferio
 
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Join Date: Jul 2000
Location: www.ci.encinitas.ca.us
Posts: 20,471

Bikes: 1959 Capo Modell Campagnolo; 1960 Capo Sieger (2); 1962 Carlton Franco Suisse; 1970 Peugeot UO-8; 1982 Bianchi Campione d'Italia; 1988 Schwinn Project KOM-10;

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I guess my nearest experiences were:

1) I tried to run a 53-50-39 half-step-plus-grannie on a 1990s Campag. Veloce crank, only to find that the spider was too thick for the half-step gearing, so I switched to something different: a 50-42-39 overdrive-plus-half-step setup. It worked fine, but I would obviously prefer the big gap on the bottom instead of the top. In years past I have built various single bolt circle triples (49-46-43 third-step, anyone?) using long bolts and spacers, and these always worked well with older-vintage cranks.
2) I wanted an 8-tooth 1.5-step drop on my Nervar Star crankset, and, unable to find a 44T/128mm BCD ring, I "stretched" the holes of a standard 130mm Shimano ring. Worked like a champ.
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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
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