The Crème de la crème of bearings. The Sector 9 Black Ball Ceramic race bearings are built for speed and built to last. Each bearing contains 7 ceramic balls that are much harder than steel, giving you bearing that will bring the heat for a long time.
Ceramic balls are so tough that they actually crush debris that gets finds its way into the bearing, continually polishing the bearing races. These bearings also feature a removable rubber shield making them easy to clean and easy to re-lube.

Quantity: Set of 8 Bearings
Includes: 4 Spacers.
Details:
Rubber coated shield is removable for easy cleaning
Ceramic bearing balls weigh up to 40% less than steel bearing balls
Hybrid ceramic bearings can operate 20% to 40% faster than conventional bearings
The lighter ball allows the bearing to spin faster, and uses less energy to maintain its speed