I recently bought from Hilary a single-pulley Campy Sport RD. Not sure what I'm going to use it for, but I found the unusual design interesting.
On receiving it, I find it is more unusual than I thought. The bottom pivot is not spring loaded, and in fact is not a pivot at all. That is, the jocky cage is fixed to the bottom of tha parallogram, and does not rotate. Instead, it is the top that pivots, and is spring loaded, AFAIK the only Campy RD with a spring loaded upper pivot until the Rally.
Anyone actually used a Campy Sport? What sort of range would it shift? I'm not even sure I know how to route the chain through this thing. Anyone have a photo of a Sport RD actually installed on a bike?
Regards,
Jerry Moos
Big Spring, TX