Diameter: 2.75"Fitment:Kawasaki Vulcan 2000 (Front or Rear)Kawasaki Vulcan 1600 Classic / Nomad (Front or Rear)ALL Cruisers (Front or Rear)(except Spirit 1100/Shadow ACE Tourer/Magnas/1997-2000 Valkyrie/2001-2003 Valkyrie)