There is a wide price range in bicycle chains and they are made of steel, stainless steel, and chrome plated steel. Harder chains are more durable, shift better, and last longer. A connex or powerlock connector allows you to remove your chain without the use of a chain breaker or chain tool meaning you are able to remove the chain and re-install it for maintenance and cleaning. The best way to prolong the life of your chain is regular application of a quality chain lube.
