Join Date: Jul 2000
Bikes: 1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
Mentioned: 4 Post(s)
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I concur with HillRider. Start by getting the largest cog your rear derailleur can accommodate. Depending on how high a top gear you need, consider combinations such as 13-27 or even 14-32.
A traditional mountain crank's 110mm outer BCD (simply ignore the grannie holes for a double) will accommodate a 34-tooth inner ring, which would be great with a 46, 48, or 50-tooth outer, depending on your tastes and your front derailleur.
My vote: 48-34 / 13-29, for a 32-100 inch gear range, but lots of other combinations are possible.
"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