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The Coetzee's tandem was made by Tom Ritchey, an avid tandem rider himself. Dori and Andrew Coetzee's Ritchey Double Switchback Break Away Tandem. © Z. Schuster

The Coetzee’s tandem was made by Tom Ritchey, an avid tandem rider himself. Dori and Andrew Coetzee’s Ritchey Double Switchback Break Away Tandem. © Z. Schuster