【 double bearing structure】Equipped with double bearing structure, which is smoother and easier to maintain than loose ball bearings, and the turning of the handlebar is light and smooth. 【integral sealed bearing】The integral sealed bearing keeps the lubricant in the bearing, has good dustproof and waterproof effect, prolongs the service life, and is suitable for harsh riding environment. 【colorful process】The headset adopts a colorful process, which is colored by water plating and vacuum plating. The hardness is strengthened, not easy to fade, and the appearance is higher. 【frame head tube】Applicable to head tube, the inner diameter of the upper tube is 44mm/1.7in and the lower tube inner diameter is 50.6mm/2.0in. The outer diameter of the upper end of the standard straight tube fork is 28.6mm/1.1in, and the outer diameter of the lower end is 30mm/1.2in. 【rubber waterproof loop】The rubber waterproof loop is made of high quality rubber, and a layer of waterproof loop is added to the headset cover to prevent corrosion, water, and sand, and have a longer service life.