Prevent dirty clothing with the Horn Catena 17 chain guard 1-wing 42/44 teeth. Your bicycle chain will also thank you, because the chain guard from HORN ensures that even coarser dirt, such as mud accumulation, remain away, which improves the longevity of your bicycle chain. The Horn chain guard is easy to retrofit and assemble. Please pay attention to the compatibility with the size and number of your chainrings as well as the intake on the inner bearing.