Campy tapers pre '94 are not ISO. Early stronglight spindles are, and some others. Unfortunately they are not JIS either, just kind of their own Italian design.
FWIW, I took a circa '81 Stronglight crank (ISO) and placed it on an ISO spindle, a 70's Campy spindle, and a JIS spindle. The q-factor went from "X"mm on an ISO taper, to "X+3" on the 70's Campy, an measured "x+6" on the JIS.
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Last edited by Ex Pres; 03-27-09 at 07:24 PM.