Join Date: Jul 2000
Bikes: 1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
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As long as your Maillard hubs are English/ISO threaded, rather than French, you'll be fine.
How many teeth are on the largest and smallest cogs of your new freewheel? A rear derailleur has two "capacities": the largest freewheel/freehub cog its jockey wheel can clear and the total number of chain half-links it can wind up. For 52-42/12-22, the respective numbers are 22 and 20, comfortably within the capabilities of the Superbe. It can wrap enough chain for a 52-42/13-26 combination, but it will be able to clear the 26T cog only if you can tighten its positioning screw far enough to move the entire cage downward and rearward sufficiently.
"Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1981 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069