Wheel bearing set filled with heavy-duty premiere marine grease and special composite gels that make it practically waterproof. The double lips of the nitrile-butadiene rubber sealing tires prevent the entry of abrasive materials, corrosive moisture, and other harmful contaminants into the bearings. For extra moisture protection, the grease filling has been increased from 30% to 60% for heavy-duty conditions. The special V-shaped groove of the inner ring provides better resistance against water penetration. It offers unmatched protection against rust and corrosion. Factory-Links ball bearings are specially designed for off-road use.