The HKK Vertex Blue is one of the toughest track racing chains in existence.

This chain is black, but appears to shine blue from certain angles, A side-effect of the hardening process the chain goes through during production.

NJS approved for use in Japanese pro keirin track racing!

Beautifully finished, super-tough race chain, with small NJS stamps on the chain links. This chain uses a bolt/nut quick-link system, like all NJS certified chains. You can instead choose to cut and install it with a chain cutter, though.

The Vertex Blue chain from HKK is the most popular chains amongst Keirin pro track riders.

The HKK Gold and Silver chains have a secondary coating to improve their corrosion resistance. If you are riding outdoors it is recommended to select one of these HKK chains.

Specifications:

• Size: 1/2" x 1/8"
• 106 Links (including Bolt & Nut-type connector link)
• NJS Stamped
• Made in Japan

Photo Credit: Cycle Project Store