Originally Posted by
caloso
You had a 60t chainring? Was that a normal thing for tandems?
My friend was a machinist and made a special BB spindle to run 4 chainrings - 26T to 60T on TA cranks. He also made a special long cage for his Campy Nuovo Record front derailleur. I think that he had a Suntour long arm rear derailleur to handle the 13-32T 6 speed FW.
We sold a number of tandems at our shop back in the 70s and kept 54, 55, 56 and 60T TA chainrings in stock for them.
Here's a Bertin tandem from our 1980 flyer. We imported these from ~1976 to 1980. We specified the components - they came with 56T large chainrings.
BTW, the tandem that I rode in the century was a Gitane badged Alex Singer bike. Mel Pinto the Gitane importer back then had some "Gitane" tandems specially built by Singer with Reynold 531 Tandem tubing and top quality components.
verktyg
Chas.