KMC X Flat SRAM fit 12/13 Speed Waxed Chain - 126L - Silver / Black

The KMC X Flat chain is designed specifically for modern 12 and 13-speed SRAM drivetrains, featuri...

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Product Information

Full details

The KMC X Flat chain is designed for cyclists running modern SRAM 12 and 13-speed drivetrains who prioritize efficient drivetrain performance and reduced maintenance. By utilizing a specialized flat-top profile and pre-applied GO Wax, this chain offers superior wear resistance and a cleaner operation compared to traditional wet-lubed systems. The primary caveat is that riders must adhere to specific maintenance intervals to maintain the integrity of the wax coating in harsh conditions.

All features

Model Part NumberK146KW
BrandKMC

Extended Product Information

FAQs

Is this chain compatible with Shimano 12-speed systems?

No, this chain is specifically designed for SRAM 12 and 13-speed drivetrains that require a flat-top profile.

Can I use standard chain oil on this chain?

Using standard oil will degrade the benefits of the pre-applied wax coating and attract more dirt. It is best to stick to wax-based lubricants.

Do I need to de-wax the chain before the first ride?

No, the chain comes ready to ride with the KMC GO Wax pre-applied.

How many links are provided?

The chain comes with 126 links, which can be shortened to fit your specific bike's requirements.

Is the Missing Link reusable?

KMC recommends using a new Missing Link if the chain has been removed for service to ensure structural integrity.

Troubleshooting

Shifting feels hesitant or noisy

Check the chain for any stiff links or signs of dirt buildup; re-wax the chain if it appears dry.

Missing Link is difficult to connect

Ensure the derailleur is in the smallest cog and the chain is not under tension while snapping the link into place.

Visible rust appearing on the chain

Although the chain is nickel-plated, constant exposure to salt or water requires a fresh layer of wax to protect the metal.

Pros and Cons

Pros

  • Optimized for SRAM flat-top shifting precision
  • Pre-waxed finish keeps the drivetrain cleaner for longer
  • Excellent corrosion resistance from nickel plating
  • Biodegradable and eco-friendly lubrication
  • Missing Link makes installation quick and simple

Cons

  • Requires frequent re-waxing to maintain optimal performance
  • Shorter maintenance intervals for MTB and adverse conditions
  • Not compatible with non-SRAM flat-top specific drivetrains

Setup, Compatibility & Care

Installation should be performed using the provided Missing Link. Always ensure the chain is routed correctly through the derailleur cage and over the cassette. Regarding compatibility, this chain is strictly for SRAM 12/13-speed drivetrains using Flat-Top technology. For care, do not use harsh degreasers that remove the factory wax. For maintenance, clean the chain gently with a dry brush or a light, wax-compatible solvent if heavily soiled, then re-apply a high-quality wax lubricant at the recommended intervals of 250 km for road and 100 km for MTB.

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