The Shimano FH-RS400 [paid link] and FH-RS500 hubs are both popular choices for road cyclists seeking reliable, efficient, and durable performance. While they share some similarities, there are key differences that can affect your riding experience, bike setup, and long-term maintenance. In this guide, we’ll compare the two models in terms of their design, performance, compatibility, and maintenance requirements to help you choose the best hub for your needs.
Design and Construction
Shimano FH-RS400 Hub
The Shimano FH-RS400 [paid link] hub is designed as a reliable, budget-friendly option for road bikes. It is part of Shimano’s RS series, aimed at providing an optimal balance between performance and cost. The FH-RS400 [paid link] hub features:
- Durable aluminum hub shell: The aluminum construction provides a balance of weight reduction and strength.
- Sealed bearings: The hub is equipped with sealed bearings to reduce the amount of maintenance required and to prevent dirt and moisture from causing premature wear.
- Freehub system: The FH-RS400 utilizes Shimano’s standard freehub body system, compatible with a variety of Shimano 8, 9, and 10-speed cassettes.
Shimano FH-RS500 Hub
The Shimano FH-RS500 hub offers many of the same advantages as the FH-RS400 but with some upgrades for improved performance. Key features of the FH-RS500 include:
- Larger axle diameter: The FH-RS500 uses a slightly larger axle diameter, which helps improve stiffness and overall bike handling, especially during high-torque efforts like sprinting or climbing.
- Updated freehub engagement system: The FH-RS500 features an improved engagement mechanism, offering faster and more reliable engagement compared to the FH-RS400, making it a better choice for cyclists who demand quick power transfer.
- Better sealing: Shimano has improved the sealing on the FH-RS500, providing enhanced protection against dirt and water ingress, thus extending the lifespan of the bearings and internal components.
Performance Differences
Freehub Engagement
One of the most noticeable differences between the FH-RS400 and FH-RS500 hubs is their freehub engagement systems. The FH-RS400 features a standard 4-pawl system, which provides reliable but somewhat slower engagement, especially when pedaling at lower speeds. The FH-RS500, on the other hand, has a 6-pawl system that engages more quickly, providing a snappier and more responsive feel when you apply power to the pedals.
This can be a significant difference for competitive cyclists or anyone who values rapid power transfer during high-performance efforts like sprinting or accelerating out of corners.
Bearing Quality and Maintenance
Both hubs use sealed bearings, but the FH-RS500’s enhanced sealing and larger diameter axle contribute to better durability and reduced friction over time. While the FH-RS400 is still a solid performer, it may require more frequent maintenance or replacement of bearings after heavy use, particularly if exposed to extreme conditions.
The FH-RS500, with its upgraded bearing system, is better suited for riders who put their bikes through more demanding conditions or those who prioritize minimal maintenance.
Weight and Stiffness
Shimano FH-RS400 Hub
The Shimano FH-RS400 is designed to be lightweight but does not focus on providing maximum stiffness. This makes it a great option for casual riders or those looking for an affordable, reliable hub for general use. The lack of a super stiff axle system makes it less optimal for high-stress situations like racing or aggressive riding.
Shimano FH-RS500 Hub
The FH-RS500, with its larger axle diameter, offers improved stiffness, particularly in situations that demand more from the hub, such as climbing or sprinting. This added stiffness translates to better bike handling, increased power transfer efficiency, and improved overall performance under load.
While the FH-RS500 is slightly heavier than the FH-RS400 due to the increased axle size and improved components, the trade-off is minimal for cyclists looking for better stiffness and more precise control.
Compatibility with Other Drivetrain Components
Shimano FH-RS400 Hub
The FH-RS400 is compatible with Shimano 8, 9, and 10-speed cassettes, which makes it a good option for cyclists using older drivetrains or riders who prefer a simpler gear setup. Its freehub body is designed to work with a variety of Shimano cassette options, so it is versatile for different types of riders.
Shimano FH-RS500 Hub
The FH-RS500 hub also supports Shimano 8, 9, and 10-speed cassettes but includes additional features that make it more compatible with newer drivetrains. The improved freehub body and larger axle diameter make it a better option for riders upgrading to newer bikes or those considering a more high-performance setup. The FH-RS500 is ideal for riders who want to future-proof their bike build with a hub that offers improved performance and compatibility with higher-end components.
Durability and Longevity
Shimano FH-RS400 Hub
The FH-RS400 offers solid durability for the price point, with its sealed bearings and robust construction providing reliable service under normal riding conditions. However, because it lacks some of the advanced sealing and bearing systems found in the FH-RS500, it may not last as long under harsh conditions like frequent wet riding or aggressive training sessions.
Shimano FH-RS500 Hub
With its improved sealing and better bearing system, the FH-RS500 is built to last longer, especially in challenging riding conditions. If you’re a cyclist who frequently rides in adverse weather or takes your bike on more demanding routes, the FH-RS500 will likely provide better long-term durability and require less frequent maintenance.
Conclusion
The Shimano FH-RS400 and FH-RS500 hubs are both solid options for road cyclists, with the FH-RS400 providing an excellent entry-level [paid link] option for budget-conscious riders, while the FH-RS500 is better suited for those looking for enhanced performance, durability, and stiffness.
- Choose the FH-RS400 if you’re looking for an affordable, reliable, and easy-to-maintain hub for general road riding.
- Opt for the FH-RS500 if you want quicker freehub engagement, better bearing durability, and improved overall stiffness for high-performance cycling.
By considering your riding style, budget, and performance requirements, you can select the best hub to suit your needs and elevate your cycling experience.