The Shimano FC-6700 [paid link] chainring is a popular component among road cyclists, praised for its durability, precision, and overall performance. As part of Shimano’s 105 group, it has become a go-to choice for riders looking for a reliable and high-performance option for their drivetrains. However, when comparing it to similar models, such as the Shimano FC-R7000 [paid link], it’s essential to understand the subtle yet impactful differences. These distinctions can affect compatibility, installation, and performance based on the needs of your specific setup.
Design and Build Quality
The Shimano FC-6700 [paid link] chainring features an aluminum construction, providing a balance of strength and lightweight performance. It is designed to be stiff yet responsive under pressure, ensuring efficient power transfer with every pedal stroke. The surface is often treated to resist wear, providing longevity even under heavy use.
In contrast, the Shimano FC-R7000 [paid link] chainring, part of the newer 105 R7000 series, uses a similar construction but has seen improvements in tooth design and machining, enhancing its overall efficiency. The R7000 features HollowTech II technology in the crankset, which significantly reduces weight without sacrificing rigidity. Although the FC-6700 [paid link] chainring is still a high-quality component, the FC-R7000 [paid link] takes a step forward in terms of both material use and design refinement.
Tooth Profile and Shifting Performance
The Shimano FC-6700 chainring is equipped with Shimano’s well-known Hyperglide technology. This technology is designed to ensure smooth and quick shifting under load. The tooth profiles are meticulously crafted to allow for seamless gear transitions, especially when under high pressure, such as during climbs or sprinting.
Comparatively, the Shimano FC-R7000 chainring features an updated version of Hyperglide technology. It incorporates a more refined tooth shape that improves chain engagement and reduces friction, allowing for faster, smoother shifts. Riders often report that the FC-R7000 chainring offers a more consistent and responsive shifting experience, particularly in challenging conditions like wet weather or mud. The additional attention to detail in the design of the FC-R7000 means it has slightly better shifting performance, especially when paired with the rest of the R7000 drivetrain components.
Weight and Stiffness
Weight is always a critical factor in road cycling performance, and the Shimano FC-6700 chainring weighs approximately 80 grams. This weight is relatively moderate for a chainring of its class but may seem a little heavier when compared to newer designs that focus on minimizing weight without sacrificing performance.
The Shimano FC-R7000 chainring, as part of a more modern series, is lighter than the FC-6700. Weighing around 70 grams, the FC-R7000 offers a better power-to-weight ratio, making it a great choice for riders who want to shave off every gram possible from their setup. The weight reduction is achieved through more efficient material use and precision machining techniques. While the difference in weight is minimal, competitive cyclists or those aiming for the best possible performance in climbing and sprints will appreciate this improvement.
Compatibility with Drivetrain Components
One of the critical aspects of choosing the right chainring is ensuring that it is compatible with your bike’s drivetrain. The Shimano FC-6700 chainring is designed for use with the Shimano 105 FC-6700 crankset and is compatible with 10-speed drivetrains. It is optimized for precise performance when used in conjunction with the rest of the FC-6700 components, such as the front derailleur and shifters.
The Shimano FC-R7000 chainring, on the other hand, is designed to work with Shimano’s newer R7000 series components, including the R7000 crankset and 11-speed drivetrains. The FC-R7000 provides enhanced shifting compatibility with the R7000 shifters and front derailleurs, making it a better choice for those upgrading to an 11-speed system. Riders using 10-speed drivetrains with the FC-6700 will not be able to upgrade directly to the FC-R7000 without changing additional drivetrain components, such as the shifters, cassette, and front derailleur.
Durability and Maintenance
Both the Shimano FC-6700 and FC-R7000 chainrings are built to last, but the FC-R7000 has a slight edge in terms of longevity. The R7000 series chainring features updated materials that are more resistant to wear and corrosion, making it a better option for cyclists who ride in diverse weather conditions. In comparison, the FC-6700 is durable but may show signs of wear more quickly under harsh conditions, particularly if not maintained properly.
Maintaining both chainrings is relatively easy, but the FC-R7000 benefits from the improved design of Shimano’s HollowTech II crankset. This design allows for easier access to the bolts and an overall more straightforward installation process. In comparison, the FC-6700 may require more careful attention during installation to ensure that the chainring bolts are tightened correctly to prevent any shifting issues.
Conclusion
In summary, while both the Shimano FC-6700 and FC-R7000 chainrings offer excellent performance and durability, the FC-R7000 excels in several key areas such as weight, shifting performance, and compatibility with modern 11-speed drivetrains. Cyclists who prioritize smooth shifting and weight savings will find the FC-R7000 to be the better choice, especially for those looking to upgrade to Shimano’s latest 11-speed systems.
However, if you’re using a 10-speed drivetrain and are satisfied with the shifting and performance of your current system, the FC-6700 chainring remains a reliable and cost-effective option. For riders looking to maximize performance while staying within the 10-speed system, the FC-6700 will continue to serve its purpose for many miles of cycling.