Shimano GRX RD-RX400 10-Speed Rear Derailleur

The Shimano GRX RD-RX400 10-speed rear derailleur keeps shifting silent and uninterrupted when riding on rough terrain.

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.

Smooth and reliable mixed surface shifting

Silent and uninterrupted rear shifting on rough terrain

Shadow RD+ chain stabilizer prevents chain slapping and drops

The gravel-tuned clutch tension helps to provide smooth and reliable mixed surface shifting

Stabilizer can be turned on/off to match terrain

Compatible with Shimano 10-speed road Dual Control Levers

Compatible with current 10s road Dual Control Lever

Wide range front gearing — Maximum front T difference: 16T

Top sprocket: Max. 11T/Min. 11T

Low sprocket: Max. 36T/Min. 32T

Total capacity: 41T

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B-Stock – This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

Specifications

Mfg PartNum: IRDRX400