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Products verified: June 8, 2026
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Selecting the right trailer axle is crucial for safe and reliable towing. An undersized or improperly rated axle can lead to catastrophic failure, posing a serious risk to your vehicle, trailer, and other road users. Investing in a quality axle ensures longevity and peace of mind on your journeys.
How to Measure Your Idler Trailer Axle - Hubface: Measure from one face of hub (where the studs start coming out of hub) to the face of hub on opposite side. Spring Center: Measure from center of one spring seat, to the center of spring seat on opposite...
High Strength Straight Steel Axle Tube Construction - Ensures even tire wear and a better highway experience | Underslung - Axle is welded with spring seats on the bottom. Allows for lower ride height. For optimal usage, use with double eye springs. | EZ...
Replaces Dexter, AL-KO, Hayes, and Lippert Axles. Design for use on Light Duty Trailers: Utility, Boat, Car Haulers, ATV, Lawn & Landscape, Motorcycle, BBQ Pit, Cargo, Enclosed, RV & More
How to Measure Your Idler Trailer Axle - Hubface: Measure from one face of hub (where the studs start coming out of hub) to the face of hub on opposite side. Spring Center: Measure from center of one spring seat, to the center of spring seat on opposite...
High Strength Straight Steel Axle Tube Construction - Ensures even tire wear and a better highway experience | Underslung - Axle is welded with spring seats on the bottom. Allows for lower ride height. For optimal usage, use with double eye springs. | EZ...
Replaces Dexter, AL-KO, Hayes, and Lippert Axles. Design for use on Light Duty Trailers: Utility, Boat, Car Haulers, ATV, Lawn & Landscape, Motorcycle, BBQ Pit, Cargo, Enclosed, RV & More
Compatibility. Trailer axle kit for 3,500lb cargo trailer, 73" hubface - 58" spring center(reference from P2), impressive support to wheels and shock absorbent for RV camper, pack with spring, U-bolt, hanger and shackle kit for replacement.1
Trailer Axle Parts Oulet. Maximum distance between spring center is 18'', between hubface is 14'', 5 bolt on 4.5 pattern trailer hub, replace the axle with prominent steel-made, provide better support to thefor 3500 lbs cargo trailer.
Trailer Leaf Spring. Confirm the measurement for sure fit, eye to eye length: 25-1/4 inch; free open: 3 inch; width of leaf: 1-3/4 inch; 4 leaves; 9/16 inch bushing dia, OEM reference: SW4B / 72-42 / LIB-401-DE / UNA212 / PR4B / 124903 / 9150014 / 93184.
Includes. Tandem trailer leaf spring kit included compatible 4 U-bolts feature 5-1/2'' long, 1/2'' dia, 2 tie plates and 8 hex nuts, 4 hangers, 4pcs 3-1/8" shackle straps and necessary locknuts and shackle bolts for one package easy replacement.
Durability. Trailer axle springs constructed with prominent steel with anti-corrosion coating, DOT qualified hardware and accessories improve the suspension system for long time and long distance journey in years.
60 inch Hub Face: The length of the shaft measured from the bottom of one wheel stud to the bottom of the other wheel stud
Installation Instructions: The packaging includes leaf spring brackets but they are not welded. They need to be welded according to your own requirements
Widely Used: Suitable for all light trailers, including trailer axle, boat trailer axle, car trailer axle, ATV trailer axle, lawn and landscape trailer axle, motorcycle trailer axle, cargo trailer axle, enclosed trailer axle, RV trailer axle, etc
Material: Made of sturdy iron and steel, it features high strength and a long service life
Note: Your measurement spacing is allowed to be off by about an inch from the size we show
How to Measure Your Idler Trailer Axle - Hubface: Measure from one face of hub (where the studs start coming out of hub) to the face of hub on opposite side. Spring Center: Measure from center of one spring seat, to the center of spring seat on opposite...
High Strength Straight Steel Axle Tube Construction - Ensures even tire wear and a better highway experience | Underslung - Axle is welded with spring seats on the bottom. Allows for lower ride height. For optimal usage, use with double eye springs. | EZ...
Replaces Dexter, AL-KO, Hayes, and Lippert Axles. Design for use on Light Duty Trailers: Utility, Boat, Car Haulers, ATV, Lawn & Landscape, Motorcycle, BBQ Pit, Cargo, Enclosed, RV & More
Compatibility. Trailer axle kit for 3,500lb cargo trailer, 61" hubface - 46" spring center(reference from P2), impressive support to wheels and shock absorbent for RV camper, pack with spring, U-bolt, hanger and shackle kit for replacement.
Trailer Axle Parts. Distance between spring center is 46" and hub face 61", 5 bolt on 4.5 pattern trailer drum hub pre-installed, replace the axle with prominent steel-made, provide better support to thefor 3500 lbs cargo trailer.
Trailer Leaf Spring. Confirm the measurement for sure fit, eye to eye length: 25-1/4 inch; free open: 3 inch; width of leaf: 1-3/4 inch; 4 leaves; 9/16 inch bushing dia, OEM reference: SW4B / 72-42 / LIB-401-DE / UNA212 / PR4B / 124903 / 9150014 / 93184.
Includes. Tandem trailer leaf spring kit included compatible 4 U-bolts feature 5-1/2'' long, 1/2'' dia, 2 tie plates and 8 hex nuts, 4 hangers, 4pcs 3-1/8" shackle straps and necessary locknuts and shackle bolts for one package easy replacement.
Durability. Trailer axle springs constructed with prominent steel with anti-corrosion coating, DOT qualified hardware and accessories improve the suspension system for long time and long distance journey in years.
1）Recommend: Enhance your towing capabilities with our 5 x 4.5 bolt pattern trailer axle, specifically designed for durability and reliability, ensuring that you can transport heavy loads with confidence
2）Superior Load Capacity: This 3500 lb idler axle is engineered to handle substantial weights, making it the ideal choice for heavy-duty applications while minimizing the need for brakes to reduce maintenance costs
3）Wide Range of Compatibility: With a 95" hubface and an 80" spring center, our axle supports a variety of trailers, ensuring smooth transport of equipment or recreational vehicles while providing excellent stability and safety on the road
4）Excellent Performance: Built to withstand tough conditions, this trailer axle features sturdy construction that ensures long-lasting performance and durability, making it perfect for all your towing needs
5）Precision Engineering for Easy Installation: Designed with a 5 x 4.5 bolt pattern, this trailer axle ensures a seamless fit for various trailers, enhancing compatibility and simplifying the installation process for your convenience
56.5 inch Hub Face: The length of the shaft measured from the bottom of one wheel stud to the bottom of the other wheel stud
46.5 inch Spring Center: It is a measurement from the center of the spring seat on one side of the axle to the center of the spring seat on the other side
Widely Used: Suitable for all light trailers, including trailer axle, boat trailer axle, car trailer axle, ATV trailer axle, lawn and landscape trailer axle, motorcycle trailer axle, cargo trailer axle, enclosed trailer axle, RV trailer axle, etc
Installation Instructions: The packaging includes leaf spring brackets but they are not welded. They need to be welded according to your own requirements
Note: Your measurement spacing is allowed to be off by about an inch from the size we show
47.5 inch Hub Face: The length of the shaft measured from the bottom of one wheel stud to the bottom of the other wheel stud
Installation Instructions: The packaging includes leaf spring brackets but they are not welded. They need to be welded according to your own requirements
Widely Used: Suitable for all light trailers, including trailer axle, boat trailer axle, car trailer axle, ATV trailer axle, lawn and landscape trailer axle, motorcycle trailer axle, cargo trailer axle, enclosed trailer axle, RV trailer axle, etc
Material: Made of sturdy iron and steel, it features high strength and a long service life
Note: Your measurement spacing is allowed to be off by about an inch from the size we show
This article is part of our complete guide Automotive — browse all our comparisons and buying guides.
Last update on 2026-06-08 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Trailer Axles
Understanding Axle Types
Trailer axles come in various configurations, primarily categorized by their suspension system. Straight axles are the most common, featuring a simple beam design. Drop axles offer a lower deck height, beneficial for trailers needing reduced ground clearance. Tandem axles are used for heavier loads, distributing weight across two axles, while triple axles offer even greater capacity and stability for very heavy-duty applications.
Key Specifications to Consider
When choosing an axle, several specifications are paramount:
Weight Capacity: This is the most critical factor. Ensure the axle's Gross Axle Weight Rating (GAWR) exceeds the expected maximum load of your trailer. Always factor in the trailer's own weight plus its cargo.
Axle Diameter and Wall Thickness: Larger diameters and thicker walls generally indicate greater strength and durability. Common tube sizes include 2" or 3" round, and 2"x3" or 3"x3" square.
Track Width: This is the measurement from the mounting flange of one hub to the mounting flange of the other. It should match your trailer's frame dimensions for proper wheel alignment.
Hub Type and Bolt Pattern: Ensure the hub type (e.g., idler or brake hub) and bolt pattern (e.g., 5-on-4.5", 6-on-5.5") are compatible with your wheels and braking system.
Braking Systems
Consider whether you need electric or hydraulic brakes. Electric brakes are common and easier to install, requiring a brake controller in the towing vehicle. Hydraulic brakes offer more stopping power but typically require a brake actuator and reservoir, often found on larger trailers.
Material and Finish
Most trailer axles are constructed from durable steel. Look for axles with protective coatings, such as powder coating or galvanization, to prevent rust and corrosion, especially if your trailer will be exposed to moisture or harsh weather conditions.
Frequently Asked Questions
How do I determine the correct weight capacity for my trailer axle?
To determine the correct weight capacity, sum the trailer's empty weight and the maximum weight of the cargo it will carry. Then, divide that total by the number of axles on the trailer. Choose an axle with a GAWR that comfortably exceeds this calculated per-axle weight.
What is the difference between an idler axle and a brake axle?
An idler axle does not have provisions for brakes and is typically used on lighter trailers where brakes are not legally required or desired. A brake axle is designed to accommodate a braking system, either electric or hydraulic, which is essential for safer stopping, especially on heavier loads.
How do I measure the track width of a trailer axle?
Track width is measured from the outer surface of one hub flange to the outer surface of the opposite hub flange. Alternatively, it can be measured from the center of one wheel stud to the center of the corresponding wheel stud on the opposite side and multiplying by two, then adding the width of the hubs.
Can I use a drop axle if my trailer already has a low frame?
Generally, drop axles are used to lower the trailer's deck height. If your trailer already has a very low frame, installing a drop axle might reduce ground clearance too much, potentially causing the trailer to bottom out on uneven surfaces or speed bumps.
How often should trailer axles be inspected?
Trailer axles should be inspected at least annually, and preferably before long trips. Look for signs of wear, damage, or corrosion on the axle beam, spindle, and around the suspension components. Also, check for any bending or twisting of the axle.
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