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The Checkpoint has a rear IsoSpeed decoupler. The company opted to not put one in the front. Sven Nys' 2018 Dirty Kanza 200 Trek Checkpoint. © Z. Schuster / Cyclocross Magazine

The Checkpoint has a rear IsoSpeed decoupler. The company opted to not put one in the front. Sven Nys’ 2018 Dirty Kanza 200 Trek Checkpoint. © Z. Schuster / Cyclocross Magazine