The KMC X12 is a high-performance 12 speed chain for road, gravel and mountain bikes, available in Black, Titanium Nitride Gold or the multi-coloured Aurora finish. It is designed to suit all leading 12 speed derailleur systems, with 126 links to cover most bikes.

When your 12 speed chain wears out, a quality replacement protects your expensive cassette and chainrings. The X12 gives you excellent shifting, and the coloured finishes let you personalise your bike at the same time.

Fast, smooth shifting

KMC’s Double X-Bridge shape and inner and outer plate chamfering help the chain move between sprockets quickly and quietly.

Strong connection

Mushroomed riveting and extra stretch proof pins give the X12 one of the strongest chain connections available, so it holds up to hard efforts.

Easy to fit

The chain is non-directional, so it can go on either way around, and the 126 link length suits most 12 speed bikes.

Finishes to suit your build

Black gives a stealthy look, Gold is Titanium Nitride coated for a hard-wearing shine, and Aurora adds a bold multi-colour finish.

Frequently Asked Questions

Will it work with Shimano and SRAM 12 speed?
KMC designs the X Series to be compatible with all leading derailleur systems. Choose the chain that matches your 12 speed drivetrain. For SRAM flattop or T-Type systems, choose a flattop chain instead.

How many links does it come with?
126 links. Shorten it with a chain tool to suit your bike.

Is the gold version coated?
Yes. The gold finish is a Titanium Nitride coating, not paint.

Item specs

• Brand: KMC
• Model: X12
• Speed: 12 speed
• Size: 1/2″ x 11/128″
• Length: 126 links
• Double X-Bridge shape
• Mushroomed riveting, extra stretch proof pins
• Non-directional
• Colours: Black, Titanium Nitride Gold, Aurora