Elevate your cycling experience with the MH-P25K Bicycle Headset Bearing, a premium component engineered for precision, durability, and smooth operation. Featuring exact dimensions of 40x52x6.5mm with 36°x45° chamfer angles, this bearing ensures a perfect fit and precise alignment in a variety of bicycle headsets. Crafted from high-grade steel and sealed for added protection, the MH-P25K bearing offers excellent resistance to rust, corrosion, and debris, making it ideal for all-weather cycling. Its smooth operation reduces friction, providing a quieter and more efficient ride while extending the life of your bike's components. The MH-P25K is compatible with part codes K4052KH6.5, BAA0006K, and ACB 6808, making it an ideal choice for replacing or upgrading your bike's headset. Installation is straightforward, allowing for quick and easy upgrades without the need for specialized tools or professional assistance. Specifications: Dimensions: 40x52x6.5mm for accurate fitting Chamfer Angles: 36° inner chamfer and 45° outer chamfer for precise alignment Compatibility: Compatible with K4052KH6.5, BAA0006K, ACB 6808 part codes