Bearing Buddy 41202 Marine Clam Shell Package

Bearing Buddy # 1781 Clamshell Pair, When backed into the water for launching, boat trailer wheel hubs, heated by travel, are suddenly cooled. Air inside the hubs contracts and a vacuum is created. Water and dirt are sucked into the hubs through the inner seals and corrosion sets in immediately. Bearing failure can be expected within two seasons in fresh water - one season in salt water. When properly installed and maintained. Boat trailer wheels can be completely submerged. A wheel hub does not have bearing protection unless a slight positive pressure is maintained inside the hub.