What Makes the Shimano STEPS CN-E6070-9 Different From a Standard 9-Speed Chain?

The CN-E6070-9 is Shimano's STEPS-series 9-speed ebike chain, engineered specifically for the higher load demands of mid-drive electric assist systems rather than being a repurposed conventional chain. The chain plate dimensions are built with additional material thickness compared to a standard 9-speed chain to handle the sustained torque delivery of a motor that can apply consistent high-wattage load through the drivetrain throughout a ride, rather than the intermittent peak loads of human-only pedaling. This reinforced plate geometry prevents the accelerated wear and link deformation that occurs when standard chains are used in e-bike applications where motor-driven torque cycles are continuous and repetitive. The chain is treated with Shimano's SIL-TEC ultra-low friction surface, which applies a fluoropolymer coating to the pin and inner plate contact surfaces, reducing friction losses at each link articulation and maintaining chain efficiency over a longer service interval than an uncoated chain.

The CN-E6070-9 is compatible with Shimano STEPS e-bike systems running 9-speed drivetrains, and is the correct specification for maintaining the drivetrain integrity and motor efficiency that the STEPS system is designed around. Using a conventional 9-speed chain in an e-bike application will result in accelerated wear and more frequent replacement intervals. The chain ships at 138 links and can be cut to the correct length for the specific bike geometry. For Shimano STEPS e-bike owners on a 9-speed drivetrain who want the correct reinforced chain designed for motor-driven use, the CN-E6070-9 is the only appropriate replacement specification.