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GRX Di2 rear derailleur (RD-RX817) GRX Di2 rear derailleur (RD-RX817)

Used GRX Di2 rear derailleur (RD-RX817) designed for 1x systems. It will accommodate up to a 42t rear cog and includes a clutch to help prevent chain slap and chain drops.

It is well used, but perfectly functional and has brand new pulley wheels.

Can ship at buyers expense

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