Bearing Buddy-style hubmate bearing protectors for boat trailers. The spring-loaded hub cap stays pressurised with grease, preventing water from entering the wheel bearing cavity when the hot trailer is submerged at the boat ramp — the most common cause of trailer wheel bearing failure. When a dry or low-grease hub hits cold water at the ramp, it draws water past the seal like a pump. A bearing protector eliminates this by maintaining positive grease pressure at all times.

Sold as a pair. Check the visual grease level indicator before each trip — if the cap is sitting flat rather than slightly proud, re-grease immediately.