"Enhance your bike’s handling with the Tripeak Sealed AC Headset Bearing. Precision AC bearings with black oxide coating deliver smooth, reliable steering while resisting wear and corrosion. Measuring 49.5x40.5x6.5mm with a 45/45° angle, it ensures precise fitment and optimal load distribution for road and MTB applications. Ideal for cyclists seeking high-performance, long-lasting headset components for accurate and durable control."