Shimano GRX RD-RX400 Dealer's Manual

Shimano GRX RD-RX400 Rear Derailleur manual cover
Pages 37
Year 2020
Language(s)
English en

Shimano GRX RD-RX400 Rear Derailleur Specification

The Shimano GRX RD-RX400 Rear Derailleur is engineered to enhance gravel and mixed-terrain cycling, providing optimal performance and reliability. It features a Shadow RD+ clutch system, designed to minimize chain slap and improve chain retention, crucial for the unpredictable terrains commonly encountered in gravel riding. This derailleur is compatible with 10-speed drivetrains, offering precise and consistent shifting performance. The maximum sprocket capacity is 34 teeth, allowing for a wide gear range suitable for various inclines and surfaces. Its construction includes durable materials, ensuring resilience against the elements and rough conditions. The derailleur's design facilitates a low-profile shape, reducing the risk of damage from obstacles and enhancing aerodynamics. Shimano's advanced engineering ensures smooth and quiet operation, which is pivotal for maintaining focus during long rides. The GRX RD-RX400 is a key component of the GRX groupset, specifically tailored for gravel enthusiasts seeking a balanced combination of functionality, durability, and weight efficiency. This derailleur is an excellent choice for cyclists requiring reliable shifting and robust performance in challenging environments.

Shimano GRX RD-RX400 Rear Derailleur F.A.Q.

How do I properly adjust the Shimano GRX RD-RX400 rear derailleur?

To adjust the Shimano GRX RD-RX400 rear derailleur, first ensure the derailleur hanger is straight. Then, set the high and low limit screws to prevent the chain from derailing. Adjust the B-tension to maintain proper chain tension, and finally use the barrel adjuster to fine-tune shifting.

What tools are required for maintaining the Shimano GRX RD-RX400 rear derailleur?

You will need a set of Allen wrenches (typically 2mm to 5mm), a Phillips screwdriver, a flathead screwdriver, and a bike-specific chain lubricant for maintaining the Shimano GRX RD-RX400 rear derailleur.

How can I troubleshoot shifting issues with the Shimano GRX RD-RX400?

Start by checking the derailleur alignment and hanger for bends. Inspect the cables and housing for wear or dirt. Ensure the chain is not excessively worn. Adjust the barrel adjuster to fine-tune the cable tension and test shifting performance.

What is the maximum cassette size compatible with the Shimano GRX RD-RX400?

The Shimano GRX RD-RX400 rear derailleur is compatible with cassettes that have a maximum of 34 teeth.

How often should I lubricate the Shimano GRX RD-RX400 rear derailleur?

It is recommended to lubricate the Shimano GRX RD-RX400 rear derailleur every 100-200 miles, or more often if you ride in wet or dusty conditions.

Can I use the Shimano GRX RD-RX400 rear derailleur with a 10-speed cassette?

Yes, the Shimano GRX RD-RX400 rear derailleur is compatible with 10-speed cassettes.

What should I do if the Shimano GRX RD-RX400 derailleur makes noise during shifting?

Check for proper alignment of the derailleur, ensure the chain is clean and lubricated, and adjust the cable tension using the barrel adjuster to alleviate noise during shifting.

How can I replace the cable on my Shimano GRX RD-RX400 rear derailleur?

To replace the cable, shift to the smallest cog, release the cable anchor bolt, remove the old cable, thread the new cable through the shifter and housing, and secure it with the anchor bolt. Adjust the tension using the barrel adjuster.

What is the recommended torque setting for the Shimano GRX RD-RX400 rear derailleur mounting bolt?

The recommended torque setting for the Shimano GRX RD-RX400 rear derailleur mounting bolt is between 8-10 Nm.

How do I clean the Shimano GRX RD-RX400 rear derailleur?

To clean the Shimano GRX RD-RX400 rear derailleur, use a soft brush and a mild degreaser to remove dirt and debris. Rinse with water, dry with a clean cloth, and lubricate the pivot points and jockey wheels.