GRX RX400 10-Speed Rear Derailleur

The Shimano GRX derailleur comes with an integrated chain stabilizer. This innovative feature ensures a quieter cycling experience while delivering excellent shifting security and precision, especially on mixed terrains. For those smooth - surface rides, it has an ON/OFF switch for the chain tensioner, allowing you to customize your ride.

Using the Shimano GRX RX400 rear derailleur is straightforward. Just install it according to the bike's instruction manual. When you're on mixed terrains, keep the chain stabilizer on to get smooth and accurate shifting and a quiet ride. On smooth surfaces, you can turn off the chain tensioner using the ON/OFF switch for a different feel. As for maintenance, regularly clean the derailleur with a soft cloth to remove dirt and debris. Check the chain stabilizer and the ON/OFF switch for any signs of damage. If you notice any issues, take your bike to a professional bike mechanic.