Suitable for frame head tube upper and lower inner diameters 34 mm. The upper tube of the front fork is a 25.6 mm straight tube front fork. Name: Has tooth Aluminum alloy Bearing Bowl Group. Specification: 34mm * φ25.6 mm. Material: Aluminum alloy. Structure: Two Peilin Bearing. Weight: ± 110g. Color: anode black. Package: 1pcs