By Dennis M Forsythe, Emeritus Professor of Biology, The Citadel, Charleston, SC
Campagnolo Olympus triple clamp-on front derailleur from the 1990s NOS NIBCAMPAGNOLO REAR HUB 36H BRITISH THREADINGCampagnolo Record A Rear Derailleur from 1976Campagnolo Oversize Axle Freehub Body Shimano SRAM 9 10 11 Speed FH-BUU015X1