ACER RACING Ceramic Ball Bearing(15X28X7mm)

6902 Ceramic Ball Bearing 61902 Ceramic Ball Bearing ABEC 5 Super high performance perfect for wheel hubs or anywhere a high performance 6902 bearings is needed. These size 6902 super high-performance ball bearings are from World Champion ACER Racing’s Ceramic Nitride Pro Series collection. They include diamond polished Grade 5 Silicon Nitride balls, which are the hardest ceramic balls on the planet (even harder than the white ceramics), dual removable no contact seals so they are completely serviceable, a high-speed low noise low friction nylon cage, and 100% synthetic American lubrication. Lighter, faster: the ACER Racing way since 1989.