KMC O-Ring Chain 428, ISO 9001 The KMC O-Ring Chain is a high-performance chain designed for long-lasting durability. It is manufactured from a specially alloyed and heat-treated steel. A special design and the O-rings, in combination with the hardened links, prevent excessive grease loss from the chain, thereby ensuring a longer service life and excellent durability (approx. 5–10 times longer than standard chains) . Thanks to the reinforced links, the KMC O-Ring Chain is suitable for all performance classes. Note: In motorcycle and kart chains, each pin is referred to as a link!
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