What is the White Lightning Chain Johnny? It"s a simple-to-use bicycle chain and drive train cover that goes on your bike’s drive train in less than a minute. It keeps grease and grime from your bike chain and derailleurs away from stuff you want to keep clean, like your car’s interior, your person, and your clothing. Getting to races or taking your bike on vacation means transporting it. Whether you load your bike inside your car or put it on a rack, protect your investments with the White Lightning Chain Johnny bicycle chain cover. The Chain Johnny has been tested by professional bike riders whose bikes travel thousands of miles each year.