Originally Posted by
embankmentlb
I believe in those days tandem groups were just combinations of the regular road cranks. I have seen 7700 cranks done that way for tandem use.
Nope...if you have the synchro chainrings on the left side (cross over) your pedals would work themselves loose if standard cranks flipped around were used. TA, Campy and Stronglight had tandem-specific cranks in 60s and 70s with the sychro chain placed on left.