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Nauman ran Dura-Ace hydraulic disc calipers with RT900 rotors. Amanda Nauman's 2019 DK200 Niner RLT 9 RDO Gravel Bike. © Z. Schuster / Cyclocross Magazine

Nauman ran Dura-Ace hydraulic disc calipers with RT900 rotors. Amanda Nauman’s 2019 DK200 Niner RLT 9 RDO Gravel Bike. © Z. Schuster / Cyclocross Magazine