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Shadow Rear Derailleur+ (medium cage)

The Shimano RD-RX817 GRX rear derailleur is Shimano's first GRX Di2 rear derailleur. The 817 in the model name indicates that this is the medium-cage version of the GRX rear derailleur. It utilizes an adjustable chain stabilizer to prevent chain slapping and drops.

Like other Shimano clutch derailleurs it has an ON/OFF switch that lets you switch the clutch on or off.

This rear derailleurs ensures silent and uninterrupted rear shifting on rough terrain, smooth and reliable mixed surface shifting.

It is compatible with any current road dual control lever and of course the GRX specific dual control levers.

Top sprocket: Max. 11T/Min. 11T
Low sprocket: Max. 42T/Min. 40T
Total capacity: 41T

RD-RX817 medium cage rear derailleur

Details & specifications

Shimano model codeRD-RX817
Shimano model nameShadow Rear Derailleur+
Weight0 g
SeriesGRX Di2
Downloads Di2 Rear derailleur manual
GRX manual
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Shopping links

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GRX rear derailleur