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Shimano GRX RD-RX817 Di2 Rear Derailleur

$179⁹⁹ $319⁹⁹

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Color

Black

Shimano | SKU: IRDRX817 | Option: Black

This product is HSA / FSA eligible

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Shimano GRX RD-RX817 Di2 Rear Derailleur Info

The Shimano GRX RD-RX817 Di2 Rear Derailleur brings electronic precision to gravel riding, where the demands on a drivetrain go well beyond what most road components are designed to handle. Built for 11-speed single-ring setups, it supports cassettes up to 42T — enough range to handle sustained climbing on loose or technical terrain without compromising top-end gearing.

Where this derailleur earns its place on a gravel build is in the details drawn from Shimano's mountain bike development. The integrated chain stabilizer reduces chain slap and keeps the drivetrain quiet over rough ground — and it can be switched on or off depending on conditions. The low-profile, compact body sits close to the frame, lowering the risk of damage on trail edges, rocky sections, or in a crash. Di2 shifting means consistent, repeatable gear changes regardless of cable stretch or trail grime.