The Ancora Expansion Plug is designed for use with carbon steerer tubes. Machined Aluminum expansion wedges paired with a knurled sleeve ensure a secure fit with the correct preload amount. Accepts any standard preload bolt and top cap (sold separately). Compatible with steerer tube inner diameter of 22.75 mm to 24.6 mm. Insertion length: 46mm. Contact surface length: 38mm. Item Specifications: Color: Gold,