Enhance your bike's performance with the MH-P16 Bicycle Headset Bearing, a high-quality component designed for precision, durability, and smooth operation. Featuring exact dimensions of 40x52x7mm with 45°x45° chamfer angles, this bearing ensures a perfect fit and precise alignment in a variety of bicycle headsets. Crafted from premium-grade steel and sealed for protection, the MH-P16 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-P16 is compatible with part codes ACB4052, R413, TH-070, MR170, and HS135, 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: 40x52x7mm for accurate fitting Chamfer Angles: 45° inner chamfer and 45° outer chamfer for precise alignment Compatibility: Compatible with ACB4052, R413, TH-070, MR170, HS135 part codes