Stainless Steel Boat Trailer Bearing Kit with Protective Grease Cap Compatible with Most 4 and 5 Bolt Lug Hubs

This bearing kit is designed for use with boat trailer hubs featuring 4 or 5 bolt/lug configurations.The bearing has a base diameter of 1.98 inches and is constructed entirely from stainless steel, including both the outer barrel and internal components, to resist corrosion in marine environments.It is intended for installation in hubs that accept standard grease caps and is compatible with trailers using common 4 and 5 bolt hub patterns. The kit includes a grease cap assembly with a spring-loaded piston and black indicator ring.When installed, grease is added through the central grease fitting until the piston extends approximately 1/8 inch, indicating the hub is filled.The spring applies consistent internal pressure—approximately 3 psi—to the grease, helping prevent water intrusion during submersion.An automatic pressure relief feature prevents over-pressurization that could damage the inner seal. To verify proper fill level, lightly press the movable piston: if it rocks or moves slightly, the hub contains the correct amount of grease.The indicator ring protrudes when full and retracts as grease depletes. Before installation, inspect existing bearings and seals.Replace any bearings showing signs of damage, rust, or pitting.Clean all old grease and from the hub and spindle.Confirm inner seals are intact and seated properly against a smooth spindle.During reassembly, fill the hub completely with a multipurpose, NLGI No.2 grade lubricant suitable for automotive suspension applications.Avoid heavy or fibrous greases and do not mix different grease types.

• Diameter Specification: Measures 1.98 inches in diameter for precise fit with specified boat trailer hub applications.
• Material Composition: Constructed from stainless steel to match the corrosion resistance and structural properties of the bearing kit.
• Grease Cap Inclusion: Includes grease caps with protective grease bra to maintain proper lubrication in the bearing assembly.
• Bolt Pattern Compatibility: Fits most 4-bolt and 5-bolt lug hub configurations commonly found on boat trailers.
• Functional Purpose: Serves as a direct replacement bearing kit to restore function in compatible boat trailer hubs.