Bearing Buddy Model 1781 Chrome Plated Wheel Bearing Protector with 17B Bra — Stainless Steel, Self‑Relieving Piston

Bearing Buddy Model 1781 is a chrome-plated wheel bearing protector with a self-regulating pressure piston and a 17B protective bra to keep grease in and contaminants out of trailer hubs.

The 1781 chrome Bearing Buddy is a stainless-steel wheel bearing cap designed for trailers, boats, RVs and utility equipment. It replaces a standard dust cap with an automatic pressure relief piston that vents excess grease while maintaining approximately 3 psi pressure inside the hub. Paired with the included 17B Bearing Buddy Bra, this kit reduces contamination from road grime and splash while offering corrosion resistance for freshwater use. The unit is made in the USA and backed by a lifetime warranty.

How does the pressure-relief piston protect my wheel bearings?

The spring-loaded piston prevents overpressurization inside the hub by releasing excess grease and trapped air. That controlled venting helps avoid seal damage and preserves proper lubrication without allowing water or dirt to enter the hub.

• Maintains safe internal pressure around 3 psi
• Automatically vents when excess grease or trapped air builds up
• Spring-loaded design minimizes backflow of contaminants
• Chrome-plated stainless steel resists corrosion in freshwater environments

Will this fit my trailer hub and how easy is installation?

Fit requires measuring your hub bore to select the correct Bearing Buddy size; Model 1781 is chrome-plated and sized to match compatible hubs. Installation is straightforward: seat the cap into the hub and tap it in with a wood block and hammer until snug. If it doesn’t fit securely, stop and contact Bearing Buddy for guidance rather than forcing it.

• Measure bore diameter before purchase
• Seat cap with a wood block and hammer—no special tools needed
• Stops are included in instructions; don’t force a loose fit
• 17B Bra slides on to keep external grease off the wheel

How does the 17B Bra add protection and cleanliness?

The 17B Bearing Buddy Bra covers the exposed portion of the Bearing Buddy and surrounding wheel area to reduce spray and prevent grease from soiling the wheel or road. It also creates a secondary barrier against mud and road debris that might otherwise contact the cap or hub.

• Fabric cover keeps excess grease from contacting the wheel face
• Reduces splash-infiltration of dirt and grime
• Simple slip-on design for quick application and removal
• Adds visible protection and professional appearance

What materials and environments are best for this bearing cover?

The 1781 is chrome-plated stainless steel, intended primarily for freshwater and general trailer use where corrosion resistance is important. It’s built to withstand road conditions on boat trailers, campers, ATVs, utility and horse trailers, while the piston and seal design keep lubricant where it belongs.

• Chrome-plated stainless steel body for rust resistance
• Designed for freshwater exposure; rinse after saltwater use
• Suitable for RVs, boat trailers, utility and horse trailers
• Manufactured in the USA with a lifetime warranty

Who is this for? The Bearing Buddy Model 1781 with 17B Bra is aimed at trailer owners and operators who want a maintenance-savvy bearing cap that controls internal hub pressure, prevents seal damage, and keeps grease off wheels. It's a practical upgrade for boaters, RVers, landscapers, farmers and fleet managers who need durable, corrosion-resistant protection and a simple installation method. Measure your hub, choose the correct size, and this Bearing Buddy provides a long-term solution to help preserve bearings and keep hubs cleaner during routine use.