Clarks self lubricating 9 speed chainclarks range of chains are offered in a wide range of alternative designs and materials precision engineered and available for all systems and in all specifications whether its a single speed coloured chain for a bmx or an 11 speed self lubricating chain we have it covered self lubricating an ingenious system which allows a lubricant to be released across the length of chain reducing both the need for maintenance and additional lubrication features cs