Columbus Carbon Expander

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This is the Columbus Carbon Expander Bung. An absolute essential for any bike with a carbon steerer tube. A carbon Fork Bung is an expander plug that tightens into the top of the s teerer tube to give the headset top cap something to pull on when compressing the headset. Specifications: • designed for forks with threadless carbon steerer• 1 1/8" or 1"• 23.0-25.0mm diameter• 49g Show more