DID 520 ERVT X-Ring Chain

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520ERVT breaks down the concept of the original motocross chain (non o-ring) and adds the benefits of an x-ring X-Ring helps keep your chain sealed with lubrication, limits dirt an d mud from getting in-between the side plates, and only has 4 contact points with the plates which means less friction than the traditional O-Ring chain More lightweight and longer chain life By adjusting the materials, the 520ERVT is now 2% lighter and has a 15% longer lifespan, all while maintaining the tensile strength For up to 500cc engine size. Show more