"Enhance your bike’s handling with the Tripeak Sealed AC Headset Bearing. Precision AC bearings with black oxide coating provide smooth, reliable steering while resisting wear and corrosion. With dimensions of 51x40x6.5mm and a 45/45° angle, it ensures precise fitment and balanced load distribution for road and MTB applications. Ideal for riders seeking high-performance, long-lasting headset components for accurate and durable control."