Choosing the right chain for your road bike is crucial to achieving smooth shifting, optimal power transfer, and long-term drivetrain durability. Among Shimano’s offerings, the CN-6701 [paid link] and CN-HG701 [paid link] chains are often compared due to their popularity in performance road setups. This article delves into their specific characteristics, strengths, and weaknesses to help you decide which chain best suits your riding style and bike configuration.
Design and Construction Quality
The Shimano CN-6701 [paid link] chain is part of the 10-speed Dura-Ace/Ultegra/105 group, designed specifically for road use. It features Shimano’s asymmetric design to enhance shift precision, especially under load. The outer plates are shaped to optimize front shifting, while the inner plates improve rear cog engagement.
On the other hand, the CN-HG701 [paid link] is a newer-generation 11-speed chain designed for both road and MTB applications. It incorporates Shimano’s SIL-TEC surface treatment, which reduces friction, enhances wear resistance, and contributes to quieter operation. Its symmetrical design suits both double and single chainring setups, offering a versatile solution for mixed-use riders.
Drivetrain Compatibility
The CN-6701 [paid link] is fully compatible with Shimano 10-speed road drivetrains, including the 105, Ultegra, and Dura-Ace groupsets of its era. It should not be used with 11-speed cassettes due to thickness constraints and differing cog spacing.
In contrast, the CN-HG701 [paid link] is compatible with 11-speed drivetrains across road and MTB platforms. While it can physically fit some 10-speed setups, performance will be suboptimal due to mismatch in chain width and cog profile geometry. Riders using dual-discipline bikes or who prefer the latest drivetrain setups will find the HG701 more suitable.
Shifting Performance
When it comes to shifting smoothness, the CN-6701 delivers excellent performance on Shimano 10-speed systems. Its asymmetric design translates to clean, responsive shifts even under load—ideal for competitive road cycling or spirited group rides.
The CN-HG701, however, exhibits a more refined feel in shifting thanks to the SIL-TEC coating and modern chain plate profiling. Riders note quieter operation and marginally faster engagement, particularly in the rear derailleur’s range. This improvement is especially noticeable in mixed-terrain or high-cadence efforts.
Weight and Efficiency
Weight differences between these two chains are minimal but worth noting for performance-focused cyclists. The CN-6701 weighs approximately 267 grams with 116 links, while the CN-HG701 comes in slightly lighter at around 257 grams. The reduction is largely due to plate shaping and treatment.
Efficiency-wise, the SIL-TEC treatment on the CN-HG701 reduces drivetrain friction, translating to marginal gains in power transfer and wear reduction. While casual riders may not perceive the difference, performance-oriented cyclists may benefit during extended climbs or time trials.
Durability and Longevity
Durability is another key area where the CN-HG701 edges out the CN-6701. The SIL-TEC coating on the newer model resists dirt adhesion and reduces chain stretch over time, leading to a longer service life when properly maintained. The CN-6701 still provides excellent longevity, especially when paired with clean road conditions and consistent maintenance.
Pricing and Value
Price-conscious cyclists will find the CN-6701 typically more affordable due to its older generation status. It offers excellent value for riders still on 10-speed drivetrains. The CN-HG701, though slightly more expensive, delivers improved longevity and versatility, which can offset the initial investment over time.
Final Verdict: Which One Should You Choose?
Choose the CN-6701 if you’re running a 10-speed road setup and prioritize proven performance with lower upfront cost. Its shifting reliability and purpose-built design make it a top-tier option within its compatibility range.
Opt for the CN-HG701 if you need 11-speed compatibility, demand enhanced efficiency, and appreciate the added durability of SIL-TEC coating. It’s a modern, versatile chain built for both road and gravel versatility.
In conclusion, the choice between the CN-6701 and CN-HG701 depends primarily on drivetrain compatibility and performance preferences. Both chains serve their intended purpose well—but understanding their nuanced differences ensures you make a smart, performance-driven investment in your drivetrain.