The evolution of gravel cycling has led to the development of specialized groupsets tailored to the unique demands of mixed-terrain riding. Two prominent contenders in this arena are Campagnolo’s Ekar 13-speed rear derailleur and Shimano’s GRX series. Understanding the distinctions between these components is crucial for cyclists aiming to optimize their gravel biking experience.

1. Gearing and Drivetrain Configuration

The Campagnolo Ekar groupset is distinguished by its 1×13-speed mechanical drivetrain, offering a single front chainring paired with a 13-speed cassette. This configuration simplifies shifting and reduces potential mechanical issues, making it particularly suitable for the unpredictable conditions of gravel riding. The Ekar cassettes are available in various ranges, with the 9-42T option providing a wide gear range to tackle diverse terrains.

In contrast, Shimano’s GRX series offers both 1x and 2x configurations with 10 or 11-speed options. The flexibility to choose between single or double front chainrings allows riders to customize their setup based on specific preferences and terrain requirements. However, the 11-speed GRX cassettes typically max out at an 11-42T range, which may offer a slightly narrower gear range compared to Ekar’s 9-42T cassette.

2. Shifting Mechanism and Ergonomics

Campagnolo’s Ekar employs a mechanical shifting system characterized by its unique thumb lever for downshifts and an index finger lever for upshifts. This design, while traditional for Campagnolo, may require an adjustment period for riders accustomed to other systems. The thumb shifter has been optimized for accessibility from both the hoods and drops, enhancing ergonomics during varied riding positions.

Shimano’s GRX series utilizes the brand’s established STI (Shimano Total Integration) system, featuring dual-control levers that manage both braking and shifting. This intuitive design is familiar to many cyclists and provides consistent performance across Shimano’s road and gravel groupsets. The GRX levers are ergonomically shaped with textured surfaces to enhance grip and comfort, particularly on rough terrains. ​

3. Weight Considerations

Weight is a critical factor in component selection, influencing bike handling and rider efficiency. The Campagnolo Ekar rear derailleur weighs approximately 275 grams, contributing to the groupset’s reputation as one of the lightest gravel-specific options available.

Specific weight details for Shimano’s GRX rear derailleurs vary depending on the model and configuration. Generally, GRX components are competitively weighted, though they may not match the ultra-light specifications of the Ekar series. Riders prioritizing minimal weight might find Ekar’s design more appealing.​

4. Maintenance and Compatibility

Campagnolo’s Ekar is a mechanical groupset, which simplifies maintenance by eliminating the need for battery charging associated with electronic systems. However, sourcing replacement parts may be more challenging due to Campagnolo’s smaller market presence compared to Shimano. Additionally, Ekar’s 13-speed system requires specific components, limiting cross-compatibility with other drivetrains.​

Shimano’s GRX series benefits from widespread availability and compatibility. The 11-speed GRX components are often interchangeable with Shimano’s road series, providing flexibility for upgrades or replacements. The prevalence of Shimano parts in the market ensures easier access to service and support, a significant consideration for long-distance or remote gravel adventures.​

5. Braking Systems

Both Ekar and GRX groupsets feature hydraulic disc braking systems, delivering reliable stopping power essential for gravel riding. Campagnolo utilizes mineral oil [paid link] in its hydraulic systems, aligning with Shimano’s choice of mineral oil [paid link] for GRX brakes. This commonality ensures consistent braking performance and simplifies maintenance routines for riders familiar with mineral oil [paid link]-based systems. ​

6. User Experiences and Reviews

Rider feedback highlights the exceptional brake modulation and unique shifting experience of the Ekar groupset. Users appreciate the tactile feel of Campagnolo’s shifting mechanism, though some note an adjustment period is necessary. The rarity and cost of replacement parts are considerations for potential Ekar users.

Conversely, Shimano’s GRX is praised for its familiarity, reliability, and extensive support network. The STI shifting system’s intuitive operation and the widespread availability of components make GRX a practical choice for many gravel cyclists. However, some riders may find the gear range limitations less suited to extremely varied terrains.​

Conclusion

Choosing between Campagnolo’s Ekar 13-speed rear derailleur and Shimano’s GRX series depends on individual priorities and riding contexts. Ekar offers a lightweight, wide-range 1×13-speed system with distinctive Campagnolo ergonomics, appealing to those seeking a unique and performance-oriented setup. In contrast, Shimano’s GRX provides versatility, compatibility, and a user-friendly interface, backed by Shimano’s extensive support infrastructure. Cyclists should consider their specific needs, terrain preferences, and maintenance capabilities when selecting the groupset that best aligns with their gravel riding aspirations.

For a comprehensive visual comparison of these groupsets, you might find the following video insightful: