Renthal's RR4 highly specialised lightweight 520 sealed ring chain was developed exclusively for Superbike racing applications where a combination of lightweight and durability are a must.
Utilizes Renthal's Self Regulating Seal (SRS) technology to increase service life.
The specially developed SRS ring is preloaded during assembly creating a spring effect.
As the chain wears, conventional o-rings and x-rings lose their seal, however, the SRS ring has the ability to unload itself during use, keeping a tighter seal against the side plates.
This offers increased longevity as the specially formulated grease remains trapped around the critical pin and bushing area longer while also keeping dirt, water and other contaminants, out.
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