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Nauman used Kogel Bearings 12-tooth Midas Gold Aluminum pulley wheels with her rear derailleur. Amanda Nauman's 2018 DK200 Niner RLT 9 RDO. © Z. Schuster / Cyclocross Magazine

Nauman used Kogel Bearings 12-tooth Midas Gold Aluminum pulley wheels with her rear derailleur. Amanda Nauman’s 2018 DK200 Niner RLT 9 RDO. © Z. Schuster / Cyclocross Magazine