This size of chain is very popular for high mileage tourers and big, heavy bikes in general.  With a combination of low wear rates and stretch resistance, they are the choice of many manufacturers when it comes to their mile-munching touring bikes.  The pitch length and roller size is common with 520 and 525 pitch chains but a much wider link is used to really spread the load.  Pitch length is 1.588cm, link width 9.53 and roller diameter is 10.16mm.  There is a great selection of chain type and colour in this class, so take a good look around to find one that is perfect for your bike and the way you ride it.