Cloud Ride Lightning Bearings were developed to be extremely high performance bearings for an affordable price. Manufactured with high carbon chrome steel, these bearings are low noise, low vibration and long lasting. The rigid nylon cage enhances performance at speed with the help ofour oil-based Cloud Ride Lighting Lubricant. Double seals protect the inner ball bearings from dirt and debris but are simple to remove for cleaning and maintenance. Cloud Ride knows speed, and these bearings are lightning fast!