Trick question: how many normal bicycle chains does a tandem bicycle have? The synchronizing chain (the front one) is very long and requires combining two normal sized chains. Those, plus the rear chain makes three.
We were a little disheartened to buy three new chains at €20 each when ours needed replacement. That’s why we are very grateful to receive a sponsorship from Tomás Domingo in Barcelona for wholesale pricing on chains and a new sprocket. And, though he was hesitant, I talked the mechanic into loaning me the tools so I could replace the sprocket myself in their stockroom. Mid-way through the job he came in looking a little frazzled and gestured with a knife-stroke finger across his throat: his boss was unhappy with his leniency. Ooops! But we couldn’t have been more grateful. Thank you Tomás Domingo.
