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Shimano's gravel-oriented GRX mechanical components include a 1x and 2x rear derailleur. Due to a mix-up, our test bike came with a 1x derailleur paired with the 2x crankset. It shifted well, but was more challenged with chain wrap duties. © A. Yee / Cyclocross Magazine

Shimano’s gravel-oriented GRX mechanical components include a 1x and 2x rear derailleur. Due to a mix-up, our test bike came with a 1x derailleur paired with the 2x crankset. It shifted well, but was more challenged with chain wrap duties. © A. Yee / Cyclocross Magazine