Ceramic Bearings Yamaha R3: The ceramic balls in these hybrid bearings are over 60% lighter than their steel counterparts resulting in faster acceleration and reduced inertial loads.Low Friction-Less Vibration the coefficient of friction for the ceramic balls is an average of 3x’s lower than steel. When you combine this with the high tolerances for roundness you get a bearing that dramatically lowers vibration levels and produces more horsepower.
First, ceramics 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 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 this adds up to a form of bearing that not only performs better, but also lasts much, much longer. Some estimates in our research put it at five to ten times longer, although the actual useful life can depend on who you’re asking or what you’re doing with the bearings.
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)