Join Date: Jul 2000
Bikes: 1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
Mentioned: 3 Post(s)
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Originally Posted by daveed
... What should I be looking out for? ...
1) (Obviously) top versus bottom pull.
2) Travel range of cage. (Since it is coming off another mountain bike, probably a non-issue.)
3) Swing arc of cage and relative heights of bottom edges of outer and inner sides of cage. These parameters will determine how well it works with your particular choice of chainrings (e.g. 2 even steps, such as 28-38-48, versus my 24-40-48 step-and-a-half-plus-grannie).
4) Curvature of bottom edge of outer edge of cage. Sharper curve radii are optimized for microdrive systems, with a 42 or 44T outer chainring.
"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