The Shimano FH-RS400 [paid link] is a high-quality rear freehub designed for road cyclists seeking reliable performance and durability. Featuring Shimano’s renowned cup-and-cone bearing system and an internal cam quick release, this hub ensures smooth rotation and easy wheel installation.
Installation of the FH-RS400 [paid link] Hub
Proper installation of the FH-RS400 [paid link] hub is crucial for optimal performance and safety.
Spoke Lacing
Ensure that the spokes are laced correctly, following Shimano’s recommended pattern. Improper lacing can lead to wheel instability and compromised performance.
Hub Installation
- Align the Hub: Position the hub within the wheel, ensuring that the drive side (right side) aligns with the sprocket.
- Insert Spokes: Thread the spokes through the hub flanges, adhering to the correct lacing pattern.
- Tension and True the Wheel: After lacing, evenly tension the spokes and true the wheel to ensure it spins straight and maintains structural integrity.
Adjustment of the FH-RS400 Hub
The FH-RS400 utilizes Shimano’s cup-and-cone bearing system, allowing for precise adjustments to achieve smooth rotation.
- Loosen the Lock Nut: Using a 17 mm hub spanner, loosen the lock nut on the non-drive side of the hub.
- Adjust the Cone: With a 15 mm hub spanner, adjust the cone by turning it clockwise to reduce play or counterclockwise to relieve bearing preload. Aim for minimal play without causing bearing binding.
- Secure the Lock Nut: Once the desired adjustment is achieved, hold the cone in place and tighten the lock nut securely against it to maintain the setting.
Maintenance of the FH-RS400 Hub
Regular maintenance extends the lifespan of the FH-RS400 hub and ensures consistent performance.
Disassembly and Cleaning
- Remove the Wheel: Detach the rear wheel from the bicycle frame.
- Extract the Axle Assembly: Using appropriate hub spanners, remove the lock nuts and cones to free the axle from the hub shell.
- Clean Components: Wipe down the bearings, cones, and interior of the hub shell with a clean cloth. Inspect all parts for signs of wear or damage.
Lubrication and Reassembly
- Apply Grease: Generously apply high-quality bicycle grease to the bearings and cones.
- Reassemble the Hub: Reinsert the axle into the hub shell, position the bearings correctly, and reinstall the cones and lock nuts.
- Adjust Bearing Preload: Follow the adjustment procedure outlined earlier to ensure optimal bearing preload.
Troubleshooting Common Issues
Noisy or Rough Bearings
If the hub exhibits noise or roughness during rotation, it may indicate contaminated or worn bearings. Disassemble the hub, clean all components, inspect for wear, and replace damaged parts as necessary.
Freehub Engagement Problems
Delayed or inconsistent engagement can result from debris within the freehub mechanism. While the FH-RS400’s freehub body isn’t designed for user service, replacing the freehub body can resolve these issues.
Customization and Optimization
Upgrading Bearings
For enhanced performance, consider upgrading to higher-quality bearings compatible with the FH-RS400 hub. This can reduce rolling resistance and improve durability.
Optimizing Lubrication
Using premium-grade grease can enhance the hub’s performance, especially in demanding conditions. Regular maintenance ensures the lubrication remains effective.
Comparison with Similar Models
FH-RS400 vs. FH-RS470
Both hubs are part of Shimano’s lineup, but they cater to different needs. The FH-RS400 is tailored for rim brake systems, while the FH-RS470 is designed for disc brakes. Additionally, the FH-RS470 features a thru-axle design, offering increased stiffness compared to the quick-release system of the FH-RS400.
Compatibility with Drivetrain Components
The FH-RS400 hub is compatible with Shimano 10 and 11-speed road cassettes, making it versatile for various drivetrain setups. Ensure that the wheel’s spacing aligns with your bicycle frame’s specifications to avoid compatibility issues.
Conclusion
The Shimano FH-RS400 hub is a reliable component for road cyclists seeking durability and performance. Proper installation, regular maintenance, and timely adjustments are essential to maximize its lifespan and ensure a smooth riding experience.
For a visual guide on servicing Shimano hubs, you may find this video helpful: