KMC e9 eBike
9-Speed Chain

Highest torsion resistance — built for motor torque

E-bike motors apply torsional force to the chain far beyond what human pedalling produces. The KMC e9 is designed to resist this — higher torsion resistance than KMC's standard chains means the chain holds geometry under load and wears more evenly over its service life.

Unsurpassed riveting geometry — highest pin power rating

KMC's strongest pin construction in this series. The riveting geometry controls how the pin is formed at the outer plate — tighter tolerances mean more consistent pin engagement and resistance to lateral flex failures.

Inner plate chamfering — stable engagement at extreme chain angles

The inner plate chamfers are shaped to guide chainring teeth smoothly into the chain. On e-bikes where the motor drives a larger chainring and extreme chain angles are common, this chamfering improves engagement consistency and reduces noise.

Asymmetric outer plate chamfers — cassette tooth clearance

The asymmetric outer plate design aids clearance of adjacent cassette teeth during shifts — particularly relevant at extreme chainline angles. Cleaner transitions between sprockets, less chain drop risk.

Elongated X-Bridge — improved shifting efficiency

The extended X-Bridge section between inner plates guides the chain more precisely over the sprocket tooth — faster, more accurate shifts across the cassette.

Double X-Durability — maximum service life

KMC's Double X-Durability treatment is applied to the chain's wear surfaces to extend service life. Combined with the e-bike-specific construction, this is KMC's longest-lasting 9-speed chain option for motor-assisted drivetrains.

136 links — extended length for long chainstays

At 136 links, the e9 is longer than most standard chains — sized to accommodate the longer chainstays common on e-bikes, cargo bikes, and step-through frames. Excess links are removed during fitting.

Includes CL566R-NP MissingLink connector

Ships with a KMC CL566R-NP MissingLink — a reusable quick-link connector that allows the chain to be installed and removed without a chain tool. Non-directional design means the connector installs in either orientation.