Another from the collection of bells from XLC, the mini bicycle bell spacer mount DD-M20 mounts to the stem of your bicycle rather than the handlebars. This makes it somewhat more discreet, although this is also because of its mini size. It is suitable only for 1 1/8" A-head stems and is part of a 4 mm aluminium spacer, so you can replace one of your current stem spacers for this bell. The diameter of the XLC DD-M20 mini bicycle bell is 47 mm, slightly bigger than the DD-M19 model. It has a brass sound body, which means it produces a nice sound that can be used to alert others of your presence. This bell can be used on many types of bicycles, including city, trekking, mountain, road and race.