Shimano, GRX RD-RX400, Rear Derailleur, Speed: 10, Cage: GS, Black

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SHIMANO GRX - Rear Derailleur - SHIMANO SHADOW RD+ - 10-speed

With an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner.

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