First,Ceramic Transmission Bearings are much lighter than their steel counterparts. As much as 50-75% lighter, the silicon nitride balls weight 60% less than equally-sized steel ball bearings, meaning there’s even less weight spinning inside the races. Secondly, and perhaps most impressively in our eyes, ceramics are incredibly strong. Another point in favor of ceramics is their resistant to heat. Steel balls tend to begin displaying integrity issues around 400 degree Celsius, while ceramics can easily operate at 2,000 degrees or more.
But the one attribute that Ceramic Motorcycle Bearings are most known for is their greatly reduced friction versus steel bearings made of any form of steel. How much better are they, you ask? About 1/10 of the overall friction. That means your wheels and other components can roll and roll all day.
All of the Spears Racing Wheel bearings are hand packed with a High end Sodium Nitrite Inhibited Grease that is insoluble and has a decomposition Temperature of 320°C (608 °F)