TRAILER HUBS & BRAKE DRUMS
IN PHOENIX, ARIZONA
Trailer hubs and brake drums are essential components of every trailer's running gear system. They support the wheels, house the wheel bearings, and, on braking axles, provide the braking surface needed for electric or hydraulic trailer brakes to operate safely. Whether you're replacing a worn hub, damaged brake drum, upgrading your trailer, or rebuilding an axle, Deer Valley Trailer stocks a large selection of trailer hubs, idler hubs, brake drums, hub and drum assemblies, wheel studs, lug nuts, bearing races, grease seals, oil seals, and related hub components.
Our inventory supports utility trailers, enclosed cargo trailers, dump trailers, equipment trailers, landscape trailers, boat trailers, car haulers, horse trailers, RV trailers, and commercial trailers. Whether you know your hub part number or simply have your old hub, our experienced parts specialists can help identify the correct replacement for your trailer.
TRAILER HUBS & BRAKE DRUMS
Trailer hubs and brake drums are essential components of every trailer's running gear system. They support the wheels, house the wheel bearings, and, on braking axles, provide the braking surface that allows electric or hydraulic trailer brakes to safely slow and stop the trailer. Whether you're replacing a worn hub, damaged brake drum, upgrading your trailer, or rebuilding an axle, selecting the correct hub assembly is critical for safe towing, proper braking performance, and long-term reliability.
Deer Valley Trailer stocks a wide selection of trailer hubs, idler hubs, brake drum hubs, complete hub and drum assemblies, oil bath hubs, wheel studs, lug nuts, bearing races, grease seals, oil seals, and related hub service components for many of today's most popular trailer axle capacities.
IDLER HUBS
Idler hubs are designed for trailer axles that do not use brakes. Their primary function is to support the wheel and tire assembly while allowing it to rotate smoothly around the spindle using precision wheel bearings. Idler hubs are commonly found on utility trailers, small landscape trailers, boat trailers, recreational trailers, and many light-duty applications where trailer brakes are not required.
BRAKE DRUM HUBS
Brake drum hubs combine the functions of a trailer hub and brake drum into one assembly. In addition to supporting the wheel bearings, they provide the machined braking surface that electric or hydraulic brake shoes press against to safely slow the trailer. Brake drum hubs are commonly used on enclosed cargo trailers, dump trailers, equipment trailers, car haulers, gooseneck trailers, horse trailers, RV trailers, and many commercial trailer applications.
TRAILER HUBS & DRUMS WE CARRY
Deer Valley Trailer stocks trailer hubs and brake drum assemblies for many of the industry's most common trailer axle capacities, including:
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2,000 lb Trailer Axles
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3,500 lb Trailer Axles
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5,200 lb Trailer Axles
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6,000 lb Trailer Axles
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7,000 lb Trailer Axles
Our inventory includes grease-packed hubs, oil bath hubs, idler hubs, brake drum hubs, complete hub kits, and replacement components for a wide variety of trailer manufacturers. If your trailer uses a specialty hub or uncommon axle configuration, we can also help identify and special order many replacement hub assemblies.
UNDERSTANDING TRAILER
BOLT PATTERNS & WHEEL STUDS
Selecting the correct trailer hub involves more than matching the axle capacity or wheel bearings. Every hub is manufactured with a specific wheel bolt pattern and wheel stud size that must match your trailer wheels. Installing a hub with the incorrect bolt pattern or wheel studs can prevent the wheels from mounting properly and may compromise safe towing performance. Understanding these specifications is one of the most important steps when replacing a trailer hub or brake drum.
WHAT IS A TRAILER BOLT PATTERN?
A trailer wheel bolt pattern identifies both the number of wheel studs and the diameter of the bolt circle they are arranged on. For example, a 5 on 4.5 bolt pattern uses five wheel studs positioned on a 4.5-inch bolt circle, while an 8 on 6.5 bolt pattern uses eight wheel studs positioned on a 6.5-inch bolt circle. Matching the correct bolt pattern ensures your wheels fit properly and seat securely against the hub.
COMMON TRAILER BOLT PATTERNS
Deer Valley Trailer stocks trailer hubs with many of the industry's most common wheel bolt patterns, including:
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4 on 4
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5 on 4.5
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5 on 5
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5 on 5.5
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6 on 5.5
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8 on 6.5
If your trailer uses a less common bolt pattern, our knowledgeable parts specialists can help identify the proper replacement hub or special order the correct assembly for your trailer.
HOW TO MEASURE A TRAILER
WHEEL BOLT PATTERN
Measuring your trailer's wheel bolt pattern is one of the most important steps when identifying a replacement hub, brake drum, or trailer wheel. The measuring method depends on whether your hub uses an even number of wheel studs or an odd number of wheel studs.
MEASURING 4, 6, OR 8-LUG BOLT PATTERNS
Trailer hubs with an even number of wheel studs are the easiest to measure. Simply measure from the center of one wheel stud directly across the hub to the center of the wheel stud opposite it. This measurement represents the diameter of the bolt circle.
For example:
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4 studs measured at 4 inches = 4 on 4
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6 studs measured at 5.5 inches = 6 on 5.5
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8 studs measured at 6.5 inches = 8 on 6.5
MEASURING 5-LUG BOLT PATTERNS
Five-lug trailer hubs are measured differently because there is no wheel stud directly opposite the starting point. To measure a 5-lug bolt pattern, place your tape measure on the outside edge of any wheel stud. Then, moving clockwise or counterclockwise, skip the second wheel stud and measure to the center of the third wheel stud.
This measurement determines the bolt circle diameter.
For example:
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Approximately 4½ inches = 5 on 4.5
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5 inches = 5 on 5
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5½ inches = 5 on 5.5
Using this method helps ensure you correctly identify the bolt pattern before purchasing replacement hubs, brake drums, or trailer wheels.
TRAILER HUB WHEEL STUD DIAMETER DIFFERENCES
Wheel studs secure the wheel to the hub using matching lug nuts. In addition to the bolt pattern, every hub uses a specific wheel stud diameter and thread size that must match the lug nuts designed for that hub. Proper wheel stud engagement is critical for maintaining wheel retention, achieving the correct clamping force, and ensuring safe towing performance.
STANDARD & HEAVY-DUTY TRAILER WHEEL STUDS
As trailer capacities increase, wheel studs become larger and stronger to safely support heavier loads.
Many standard trailer hubs commonly use 1/2-inch wheel studs, like 5,200 lb, 6,000 lb, and 7,000 lb trailer axles, but heavy duty 7000 lb and 8000 lb hubs use 9/16-inch wheel studs.
Larger commercial and heavy-duty trailer axles may utilize 5/8-inch wheel studs, depending on the axle manufacturer and intended application.
Using the proper wheel stud diameter and matching lug nuts is essential for maintaining the trailer's designed load capacity and ensuring dependable wheel retention during operation.
LUG NUT COMPATIBILITY
Wheel studs and lug nuts are engineered to function as a matched system. Thread size, seat style, and overall dimensions must all be compatible with both the hub and the trailer wheel. Reusing damaged lug nuts or installing the incorrect thread size can damage the wheel studs, prevent proper torque, and increase the risk of wheel damage. If you're replacing hubs or wheel studs, Deer Valley Trailer can help identify the correct lug nuts for your trailer.
IDENTIFYING THE CORRECT
TRAILER HUB
The most accurate way to identify a replacement trailer hub is by considering the complete wheel-end assembly rather than relying on a single specification. Bearing numbers, grease or oil seal dimensions, spindle type, axle capacity, wheel bolt pattern, wheel stud diameter, and brake size all work together to determine the proper replacement hub. Bringing your existing hub, bearing numbers, spindle measurements, or trailer information to Deer Valley Trailer allows our experienced parts specialists to help identify the correct replacement with confidence.
DEER VALLEY TRAILER EXPERT TIP
One of the most common mistakes we see is customers identifying a replacement hub using only the wheel bolt pattern. While bolt pattern is an important part of the identification process, it is only one piece of the puzzle. Two hubs may both have an 8 on 6.5 bolt pattern but use different bearing combinations, grease or oil seals, brake drum sizes, wheel stud diameters, or axle capacities. The best way to ensure the correct replacement is to identify the complete wheel-end assembly. If you're unsure, bring your existing hub, bearing numbers, or trailer information to Deer Valley Trailer, and our knowledgeable team will help you find the right parts for your trailer.