TRAILER WHEEL BEARINGS,
GREASE SEALS & OIL SEALS
IN PHOENIX, ARIZONA
Trailer wheel bearings, grease seals, and oil seals are some of the most important components in your trailer's running gear system. Together, they support the weight of your trailer, allow the hubs to rotate smoothly, and protect critical moving parts from dirt, moisture, and road debris. Whether your trailer uses traditional grease-packed hubs or oil bath hubs, properly maintained bearings and seals are essential for safe towing, long component life, and reliable performance.
Deer Valley Trailer stocks one of Arizona's largest selections of trailer wheel bearings, bearing races, grease seals, oil seals, bearing kits, dust caps, bearing protectors, spindle nuts, and related hub service components for utility trailers, enclosed cargo trailers, dump trailers, equipment trailers, boat trailers, car haulers, gooseneck trailers, horse trailers, RV trailers, and many commercial trailers.
Whether you're performing routine maintenance, rebuilding a trailer hub, replacing worn bearings, or identifying hard-to-find bearing and seal combinations, our knowledgeable parts specialists are here to help you find the correct replacement for your trailer.
WHAT ARE TRAILER WHEEL BEARINGS?
Trailer wheel bearings are precision-machined roller bearings that allow the trailer hub to rotate smoothly around the spindle while supporting the weight of the trailer and its cargo. Every hub assembly relies on properly lubricated bearings to reduce friction, minimize heat, and provide dependable performance while towing. Most trailer hubs use both an inner bearing and an outer bearing that work together with matching bearing races and a grease seal or oil seal to protect the hub assembly.
GREASE SEALS VS. OIL SEALS
Grease seals and oil seals perform the same critical function—they keep lubricant inside the hub while preventing dirt, dust, water, and other contaminants from entering the bearing cavity. The primary difference is the type of lubrication used inside the hub.
Most light-duty and medium-duty trailers use grease-packed hubs, which rely on grease seals to retain wheel bearing grease around the bearings. Many heavy-duty trailers, including some equipment trailers, commercial trailers, and heavy-capacity axles, use oil bath hubs, which require oil seals specifically designed to retain gear oil or hub oil while providing continuous lubrication to the bearings.
Using the correct seal is essential for maintaining proper lubrication and protecting your bearings from premature wear or failure.
GREASE SEALS
Grease seals are commonly used on trailers with grease-packed wheel bearings. They are designed to retain bearing grease while protecting the hub assembly from water, dust, road debris, and other contaminants. Because grease seals wear over time, they should always be inspected whenever the trailer hub is serviced and replaced whenever signs of wear, leakage, or damage are found.
OIL SEALS
Oil seals are designed specifically for oil bath hub systems commonly found on heavier-duty trailer axles. These seals retain hub oil while preventing leaks that could lead to bearing damage. Because oil bath hubs allow the lubricant to circulate continuously around the bearings, maintaining a quality oil seal is critical for long-term reliability and proper bearing lubrication.
COMMON TRAILER WHEEL BEARINGS WE STOCK
Deer Valley Trailer stocks many of the industry's most common trailer wheel bearings used on utility trailers, enclosed cargo trailers, dump trailers, equipment trailers, boat trailers, car haulers, horse trailers, RV trailers, and commercial trailers. Our inventory supports numerous trailer axle manufacturers and many popular trailer brands.
COMMON TRAILER GREASE SEALS & OIL SEALS WE CARRY
Trailer wheel seals are manufactured in a wide variety of inside diameters, outside diameters, widths, and sealing designs. Selecting the correct grease seal or oil seal is essential for protecting your wheel bearings and ensuring proper hub performance. Deer Valley Trailer stocks seals for many common trailer hub and spindle combinations, and our experienced staff can help identify the correct replacement using a part number, dimensions, spindle measurements, or your original components.
HOW TO IDENTIFY THE CORRECT BEARING OR SEAL
Identifying the correct wheel bearing, grease seal, or oil seal is often easier than many trailer owners realize. In many cases, the original components contain manufacturer part numbers that can be matched directly to replacement parts.When part numbers are no longer legible, accurate spindle measurements or the original hub assembly can often be used to identify the correct components.
Whether your trailer uses grease-packed hubs or oil bath hubs, our knowledgeable parts specialists can help determine the proper bearing and seal combination for your application.
COMPLETE HUB SERVICE COMPONENTS
Proper wheel bearing service involves more than replacing the bearings alone. Deer Valley Trailer stocks a complete selection of hub service components to help ensure reliable performance and long service life.
RELATED PRODUCTS WE CARRY
Trailer Wheel Bearings
Bearing Races
Grease Seals
Oil Seals
Complete Bearing Kits
Dust Caps
Oil Caps
EZ Lube Dust Caps
Bearing Protectors
Castle Nuts
Tang Washers
Cotter Pins
High-Temperature Wheel Bearing Grease
Hub Oil
Complete Hub Assemblies
DEER VALLEY TRAILER EXPERT TIP
One of the most common mistakes we see is replacing only the bearing that has failed while reusing the existing seal. Whether your trailer uses a grease seal or an oil seal, the seal is the first line of defense against contamination and lubricant loss. Replacing bearings without carefully inspecting or replacing the matching races and seals can significantly reduce the life of the repair. Taking the time to service the entire hub assembly helps improve reliability, extend bearing life, and reduce the likelihood of unexpected roadside repairs.