Bearing Buddy 42440 Chrome Plated Wheel Bearing Protector, 2.441 Inch Inside Diameter Trailer Hub Cap

The Bearing Buddy 42440 is a chrome-plated wheel bearing protector designed to keep marine, RV, ATV, and utility trailer hubs properly lubricated and sealed against water and dirt intrusion. It installs directly into the trailer hub in place of the factory dust cap, creating a pressurized bearing cover system rather than a simple static cap. Inside each unit is a spring-loaded piston that maintains a safe internal pressure, keeping grease pushed against the seals while automatically relieving excess pressure through a self-regulating valve so the inner seal is never damaged by overpressurization.

Bearing Buddy 42440 is built from chrome-plated stainless steel for corrosion resistance in both saltwater and freshwater environments, making it suited to boat trailers, campers, horse trailers, and other utility trailers that see regular exposure to moisture. It is sized for hubs with a 2.441 inch inside diameter, with an outside diameter of 2.5 inches and an item thickness of 2.44 inches. Each unit ships individually (1 count) and weighs 1.3 pounds. Installation is straightforward: measure the hub opening to confirm proper fit, then tap the unit into place using a wood block and hammer, checking that it seats securely before towing. The product is manufactured in the USA and quality inspected for a precise fit.

Specifications

• Brand: Bearing Buddy
• Manufacturer Part Number: 42440
• Bearing Number: 2441
• Model Number: 3000.0886
• Material: Chrome-plated stainless steel
• Bearing Type: Roller Bearing
• Inside Diameter: 2.441 inches
• Outside Diameter: 2.5 inches
• Item Thickness: 2.44 inches
• Item Dimensions: 10 x 7 x 5 inches
• Compatible Lubricant: Grease
• Unit Count: 1
• Weight: 1.3 pounds
• UPC: 650209424406
• Country of Origin: United States

Frequently Asked Questions

What size hub does the Bearing Buddy 42440 fit? The Bearing Buddy 42440 only fits hubs with a 2.441 inch inside diameter, and it has an outside diameter of 2.5 inches and a thickness of 2.44 inches, so measuring the hub opening before installation is important to confirm a secure fit.

How does the pressure relief system work? A spring-loaded piston inside the Bearing Buddy 42440 keeps the hub pressurized to push grease against the seals, and a self-regulating valve automatically releases excess grease and pressure so the inner seal is not damaged by overpressurization.

What is the Bearing Buddy 42440 made of? It is made of chrome-plated stainless steel, which is corrosion resistant and suited to saltwater and freshwater trailer use.

How much does the Bearing Buddy 42440 weigh? This unit weighs 1.3 pounds.

How is the Bearing Buddy 42440 installed? Installation involves measuring the hub for proper fit, then tapping the unit into the hub using a wood block and hammer; no special tools or experience are required, but installers should stop and check fit if it does not seat securely.

Does one Bearing Buddy 42440 come with a protective bra or cover? No, the 42440 is the bearing protector unit itself without a protective bra or cover included.

Is the Bearing Buddy 42440 sold as a single unit or a pair? It ships as a single unit (unit count of 1), so a pair of hubs would require two units.

What vehicles or trailers is the Bearing Buddy 42440 used on? The Bearing Buddy 42440 is used on boat trailers, RVs, ATVs, utility trailers, and horse trailers that use hubs with a 2.441 inch inside diameter.

What lubricant is used with the Bearing Buddy 42440? It is designed for use with grease as the compatible lubricant, maintained under pressure inside the hub.

Where is the Bearing Buddy 42440 manufactured? The Bearing Buddy 42440 is manufactured in the USA.