Columbus Fork Bung

. Made to provide a reliable anchor point for your stem, this durably designed expander bung is specifically designed for use with Columbus' range of carbon forks with 1 18" threadless steerer tubes. Coming complete with dual, knurled aluminium wedge rings to ensure a snug fit and set compression tension, this excellent addition to your cockpit provides a sturdy base for your steering setup. Features Material Knurled Aluminium Includes Expander kit with bolt aluminium stem cap Diameter 23 25mm Weight 49g with stem cap Buy Columbus Components from Chain Reaction Cycles, the World's Largest Online Bike Store.