Bearing Protector set, 1.98", with rubber covers. These are drive-in replacement 1.986" OD Bearing Protecting hub caps for trailer hubs. They will fit any hub that requires this size cap. These protectors are designed with a grease fitting used to lubricate the spindle bearings without removing the caps. These are perfect for boat trailers that are occasionally submerged in water. These caps are necessary to protect the spindle bearings from seizing due to contamination entering the bearing area which will gall the bearing surface preventing the tire from rotating (Quantity 2).
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