Motorcycle Chain O-ring from CZ Chain “ For most riders choosing this CZ o-ring motorcycle chain this makes a lot of sense “ a hard-wearing sealed chain at great price. O-ring motorcycle chains are great in dusty, wet, muddy and grimy conditions. The "O" ring seals ensure dirt, sand and mud are kept out of the chain links and chain rollers.  The "O" ring design also contains a special lubricant inside the chain joints to ensure maximum wear life and great performance. CZ Chains are the chain of choice for the following world class European manufacturers, Gas Gas, Husqvarna, KTM, Beta, BMW & Ducati.