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A small, replaceable derailleur hanger pairs with the thru-axle dropout like a jigsaw puzzle piece. Crumpton's carbon gravel bike. 2019 NAHBS Sacramento. © A. Yee / Cyclocross Magazine

A small, replaceable derailleur hanger pairs with the thru-axle dropout like a jigsaw puzzle piece. Crumpton’s carbon gravel bike. 2019 NAHBS Sacramento. © A. Yee / Cyclocross Magazineundefined