Bike Headsets Aluminium Alloy 28.6x44‑50.6x39.8mm High Accuracy T6 Heat Treatment Waterproof Bicycle Bearings

Feature: 1. Aluminum alloy outer bowl, T6 heat treatment, CNC process, inbuilt full deep ditch ball bearing, efficient operation, long lasting silence. 2. Metal bearing rotates 360 degrees , using metal bearings, with high accuracy, high speed, and precise insertion of the front fork, smoothly and freely. 3. Integral sealing keeps the lubricant in the bearing, which has good dustproof and waterproof effect and is suitable for harsh riding environments. 4. Use high quality rubber, add a layer of waterproof loop in the bowl cover, anticorrosion, waterproof and dustproof, longer service life. 5. Suitable for the inner Diameter of the upper tube of frame head tube is 44mm, the inner Diameter of the lower tube is 50.6mm, and the outer Diameter of the upper end of the standard tapered tube fork is 28.6mm and the outer Diameter of the lower end is 39.8mm. Specification: Item Type: Bike Headsets Material: Aluminum Alloy Specification: 44 50.6mm (Use with 1.5 Cone Fork) Applicable Situation: Frame Head Tube: Upper Tube Inner Diameter 44mm, Lower Tube Inner Diameter 50.6mm. Front Fork: Upper End Outer Diameter 28.6mm, Lower End Outer Diameter 39.8mm. Applicable Measurement Instructions: (The same four data can be applied) The inner Diameter of the upper tube and the inner Diameter of the lower tube, to obtain the inner Diameter of the upper and lower tubes of frame; The outer Diameter of the upper end and the outer Diameter of the lower end are the outer diameters of the upper and lower ends of the front fork.. Package List: 1 x Sunflower Top Cover Kit1 x Headset Cover1 x Urging Loop1 x Upper Bearing1 x Upper Headset1 x Lower Headset1 x Lower Bearing1 x Bottom File