Originally supplied as OEM equipment on complete bikes across multiple price points, KMC's X9.93 has earned a reputation as a reliable 9-speed chain that handles daily use without demanding attention. The chain evolved from KMC's Z9000 with an upgraded stretch-resistant design that maintains pitch accuracy over extended mileage. For riders maintaining 9-speed drivetrains on commuters, gravel bikes, or mountain bikes where chain cost factors into the maintenance equation, the X9.93 delivers the shifting performance of KMC's X-series at a practical price point.

Construction follows the same principles found in KMC's higher-end chains. Double X-Bridge plate geometry creates engagement ramps that guide the chain onto cassette cogs and chainring teeth without hesitation, while chamfered inner and outer plate edges smooth the transitions between gears. The bridge shape between rivets increases lateral stiffness at each link, which translates derailleur movement into gear changes more quickly than chains with flexible link assemblies. Solid pins and plates throughout the chain prioritize durability over weight savings, resulting in a 274-gram chain that handles the loads of regular riding without the maintenance concerns that sometimes accompany ultralight construction.

KMC secures the pins using mushroom riveting, which flares the pin ends to lock them into the outer plates. This connection method handles shifting under load without the pin walking or plate separation that can occur with lesser construction. Stretch-proof heat treatment increases the hardness of the pins and plates, which slows the elongation that develops as chains wear and eventually causes poor shifting and accelerated cassette wear.... Read More