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Bumpy roads can make a trailer shake and rattle. This 3-leaf double-eye spring flexes to absorb road shock, giving a smoother ride and helping your trailer stay level even on uneven ground. Its design reduces wear and tear across your frame and suspension parts, keeping everything tracking straight mile after mile.
Strength matters when you’re hauling heavy. Each spring carries a 2,000-lb capacity, making a matched pair perfect for a 4,000-lb axle setup. The durable steel leaves work together to balance load forces and prevent sag, so the suspension stays consistent under weight.
Getting the right geometry keeps your suspension working smoothly. This spring measures 25-1/4"" from eye to eye and 1-3/4"" wide, with 9/16"" eye bushings already in place. That means it connects cleanly to standard hangers or equalizers using common suspension hardware.
The included nylon bushings keep metal parts from grinding together, which cuts down on noise and extends the life of your bolts and shackles. Smooth movement through the bushings helps maintain even flex in the spring pack for steady towing over time.
Each of the three leaves is built from sturdy steel to handle daily use and resist fatigue. At 3/8"" thick, they deliver a tough balance between flex and strength—ready to take road shocks head-on while keeping your trailer riding level and controlled.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody, Andy here with etrailer.com. Let's take a real quick look at this 3-leaf double-eye spring for your 4,000-pound trailer axle. This double-eye leaf spring acts as part of your trailer suspension system by providing an attachment point for a 4,000-pound axle. It is made of a sturdy steel construction and it's designed to flex to absorb road shock and give you a smooth ride, reducing wear and tear on your trailer. And this is going to ensure a level ride on bumpy and uneven surfaces. Now, double-eye leaf springs attach to hangers that are welded onto your trailer.
On one end of the spring will attach, one end of the spring, rather, will attach directly to the hanger with the suspension bolt and the other end will attach to shackle straps that are suspended from a hanger. These straps are going to allow the spring to move and pivot so that it can better compensate for uneven pavement. If you have a tandem or a triple-axle trailer, the shackle straps will be attached to the equalizer that connects multiple springs. Now, if you do need hangers, suspension bolts or equalizers, you can find all that here at etrailer.com. In the eyes on each end are pre-installed nylon bushings and the eye diameter with the bushings is 9/16 of an inch, without the bushing, it's 11/16 of an inch.
Again, this is a three-leaf spring with a leaf thickness of a quarter of an inch, and it has a spring capacity of 2,000 pounds. So, when paired with another one on the other side, that's where you're going to get your 4,000-pound trailer axle capacity. Now, the length from center of spring eye to center of spring eye is gonna be 25 1/4 inches. The spring width is 1 3/4 inches, and additional dimensions with the diagram are available on this product page, if you're looking for other measurements of this spring. To ensure proper axle alignment and suspension performance, you probably know that leaf springs should always be replaced in pairs.
And if you do decide that this is going to be exactly what you need, that's great. We would love to hear back from you, though, after you get this installed and after it's been in use for a while, and you can share your experiences with us by either leaving a comment or a review on this product page, and with reviews you can also send us photos of this in action if you would like. Well, that's gonna wrap up our quick look today. I do hope that it was helpful for you. Again, my name is Andy, thank you for joining me.
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Gwendolyn Y.
4/30/2026
Hey Tom, I definitely understand how frustrating that can be, having to fight with the bushings and bolts during install is never a good time. The way the spring eyelets are formed at the factory can sometimes cause the hole to be slightly oblong, which can make getting everything lined up more difficult than expected.