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Vittoria's Terreno Zero tire has no tread in the center and minimal knobs on the side. Amanda Nauman's 2018 DK200 Niner RLT 9 RDO. © Z. Schuster / Cyclocross Magazine

Vittoria’s Terreno Zero tire has no tread in the center and minimal knobs on the side. Amanda Nauman’s 2018 DK200 Niner RLT 9 RDO. © Z. Schuster / Cyclocross Magazine