Wheel Bearing Kit - Front/RearBearing is packed with heavy duty premium marine grease and with the addition of special complex thickeners which allows it to be virtually waterproof. Nitrile Butadiene Rubber Double lip oil seals help prevent abrasives, corrosive moisture and other harmful contaminants from entering bearings. To further help keep any moisture out, we have gone from 30% grease filling to a 60% for harsh conditions. Factory Links ball bearings are specially designed