Tandem bicycle - Wikipedia

Santana Elan tandem

PRESERVATION BICYCLE #28: The 1982 Peugeot Grand Touring Tandem

Tandem bicycle - Wikipedia

File:Bike Friday DoubleDay folding recumbent tandem bicycle

Ramon Casas and Pere Romeu on a Tandem - Wikipedia

Tandem bicycle - Wikipedia

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Bicycle History: From the Tandem to the Quintet (5), Double Quint

Bicycle - Wikipedia