The Shimano GRX RD-RX400 10-speed rear derailleur keeps shifting silent and uninterrupted when riding on rough terrain.
â€¢A Shadow RD+ chain stabilizer prevents chain slapping and drops
â€¢The gravel-tuned clutch tension helps to provide smooth and reliable mixed surface shifting
â€¢Stabilizer can be turned on/off to match terrain
â€¢Compatible with Shimano 10-speed road Dual Control Levers
Ordered by Most Relevant First
Not compatible with older 10sp shifters
This is a great med long cage derailer. Shimano says max 36 tooth, but it seems to be working fine on a 2x system with 42 max cog. Thing to note this is shimano's new shift ratio, so grx shifters or new tiagra shifters are required, older 10speed shifters do not work.
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