The DID 520 O-Ring chain is a top quality for off road racing because of their reputation of meeting high quality demands that is required when pushing the limits.
DID uses an o-ring between plates to hold the injected grease in the pin, resulting in an extended life chain.
Extreme quality assurance that DID is known for ensures perfect roundness with the O-Ring chain to provide a chain that reduces friction and extends chain life.
To build a chain tolerable to the demands of off road riding, DID uses shot-peened side plates and heat treated components that provide an average tensile strength of 6,630 pounds. The anti-kink link design provides a trouble free chain.
Note: the DID 520 O-Ring chain includes a clip style master link.