Originally Posted by
T-Mar
My favourite example is Campagnolo's Cambio Corsa with the sliding hub and two levers mounted on the seat stay. It was archaic even in its day.
Campagnolo's Cambio Corsa and Paris Roubaix systems were designed when the popular "knowledge" insisted that frictional losses in the chain running through a derailleur pulley cage were simply unacceptable.