"Optimize your bike’s handling with the Tripeak Sealed AC Headset Bearing. Precision AC bearings with black oxide coating provide smooth, reliable rotation while resisting wear and corrosion. Measuring 41x30.1x7mm with a 45/45° angle, it ensures accurate fitment and balanced load distribution for road and MTB applications. Perfect for cyclists seeking durable, high-performance steering components for long-lasting and precise control."