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Andrew set up a SRAM Red eTap system on the drive side, including the shift/brake levers. Dori and Andrew Coetzee's Ritchey Double Switchback Break Away Tandem. © Z. Schuster

Andrew set up a SRAM Red eTap system on the drive side, including the shift/brake levers. Dori and Andrew Coetzee’s Ritchey Double Switchback Break Away Tandem. © Z. Schuster