The Shimano CN-6701 [paid link] chain is a performance-focused component engineered for 10-speed road drivetrains. Despite its straightforward design, achieving optimal performance depends heavily on correct component pairing. This guide reveals crucial compatibility insights to help you avoid mismatched setups that compromise shifting performance and drivetrain longevity.

Understanding the CN-6701 Chain Design

The CN-6701 [paid link] is part of Shimano’s 10-speed Dura-Ace/Ultegra group and features a directional design. Unlike symmetrical chains, the CN-6701 [paid link] is engineered to optimize both outer and inner plate functions. The outer plates facilitate smooth front shifting, while the inner plates reduce drivetrain noise and friction in the rear. This directional nature has direct implications for compatibility, particularly when integrating with non-Shimano or mismatched components.

Drivetrain Compatibility: Ideal Pairings

For peak performance, the CN-6701 chain should be paired with Shimano 10-speed road systems, specifically those from the Ultegra 6700, Dura-Ace 7900, and 105 5700 series. These drivetrains share ramp profiles, cog spacing, and derailleur geometry designed to work seamlessly with the CN-6701. When used within this system, the chain ensures accurate indexing and reduced wear.

The CN-6701 is also compatible with many Shimano 10-speed flat-bar road and trekking drivetrains. However, it is not ideal for mountain bike systems, even if they use 10-speed setups. Differences in cog width and shifting loads make the CN-6701 less suitable for off-road conditions.

What to Avoid: Incompatible Combinations

The CN-6701 chain is not recommended for 11-speed or 9-speed systems. Attempting to use it on an 11-speed drivetrain can result in imprecise shifting due to wider chain dimensions. Conversely, using it on 9-speed systems risks chain drop and premature wear.

Compatibility issues are also prevalent with SRAM and Campagnolo drivetrains. SRAM 10-speed road systems have slightly different cog spacing and shifting characteristics. While the CN-6701 may function, performance will likely degrade under load or during complex shifts. Campagnolo 10-speed systems are entirely incompatible due to vastly different chain widths and spacing tolerances.

Front and Rear Derailleur Considerations

The CN-6701 chain’s directional design is optimized for Shimano front derailleur curvature and shift ramps. Using a non-Shimano front derailleur can introduce sluggishness in chainring transitions. Rear derailleurs from third-party brands may also present indexing issues, especially when paired with wide-range cassettes or longer cage configurations.

Crankset and Chainring Matching

For best results, pair the CN-6701 with Shimano 10-speed-specific chainrings. Chainring profiles, tooth shaping, and ramping are designed with Shimano chain plate geometry in mind. Mismatched chainrings, especially those from aftermarket brands without compatible profiling, can lead to chain suck and delayed front shifts.

Cassette Compatibility Tips

Shimano 10-speed cassettes are the best fit for the CN-6701. While the chain may physically run on a SRAM 10-speed cassette, long-term reliability and shift precision may suffer. Avoid 11-speed cassettes entirely as they demand a narrower chain. If mixing cassette brands, verify that tooth profiles and spacing closely resemble Shimano’s specifications.

Mixing Components: What Works with Caution

Mixing Shimano and SRAM components is possible but not advisable with the CN-6701. If riders choose to experiment, limiting this to rear derailleur and cassette pairings may yield acceptable results. However, combining the CN-6701 with SRAM front shifting systems or chainrings will introduce mechanical inefficiencies. Always test mixed setups thoroughly under load before committing to long-term use.

Final Thoughts on CN-6701 Chain Compatibility

The Shimano CN-6701 is a high-precision chain that performs optimally within its intended ecosystem. Deviating from recommended components increases the risk of erratic shifting, drivetrain noise, and accelerated wear. Riders seeking long-term performance and minimal maintenance issues are best served by pairing this chain with a fully Shimano 10-speed road group. When in doubt, consult component-specific manuals or contact a professional bike mechanic to ensure a well-matched drivetrain.