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Tetrick swapped in a SRAM Force 1 derailleur for the stock Shimano Di2 model. Alison Tetrick's 2018 Gravel Worlds S-Works Diverge Gravel Bike. © Z. Schuster / Cyclocross Magazine

Tetrick swapped in a SRAM Force 1 derailleur for the stock Shimano Di2 model. Alison Tetrick’s 2018 Gravel Worlds S-Works Diverge Gravel Bike. © Z. Schuster / Cyclocross Magazine