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You're setting up a tandem-axle suspension and need everything to line up. Fits 1-3/4" double-eye springs on 2,000-7,000 lb axles and includes hangers, equalizers, shackles, and hardware to get both axles tracking correctly.
This system uses equalizers between the axles to transfer load as the trailer moves. When one axle hits a bump, the equalizer pivots to help keep weight distributed across both axles, improving stability and reducing harsh movement.
All hangers in this kit are 3-1/4" tall, measured from the center of the bolt hole to the top of the hanger. Using the same height at each position keeps the suspension level and simplifies layout during installation.
Proper hanger spacing depends on spring length and equalizer size. Setting the correct spacing allows the equalizer to pivot freely and prevents binding as the suspension moves.

Includes equalizers, 2-5/8" shackle straps, 3" long x 9/16" diameter bolts, and matching locknuts. Provides the core components needed to connect springs and equalizers to the trailer frame.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everyone. Steve here with etrailer.com. Thanks for joining me today while we take a look together at the Terran Industries tandem axle hanger kit for double-eye springs. They're gonna feature 3 1/4-inch tall hangers. So folks, again for double-eye springs, these will mount your 1 3/4 inch wide double-eye springs to a tandem trailer frame. So this will support multiple weights between 2,000 and 7,000 pound trailer axles.
Your kit's gonna come with your hangers, your shackle straps, shackle bolts and nuts, and of course your equalizer. So the equalizer, as you probably know, is the center point. You're gonna have one spring here, one spring here, going out this way, other one out this way, and your middle hanger here so it can pivot as it needs. Now, these are being measured from the center of the hole to the top plane here. That's where they're getting that 3 1/4 inch tall.
On your equalizers, center to center, I got 7 3/4 inches, center to center. On your shackle straps, I got 2 5/8, center to center. And on the shackle bolts, the usable length, so don't count the head, but the usable length is right at three inches, maybe 1/16 of an inch past, somewhere in that area. And then of course, all of your shackle nuts, those are 9/16-inch holes, which match up to all the bushings and everything on the holes. This is gonna be a weld-on kit, so make sure that you're a certified welder if you're doing that kinda thing, and make sure you're getting it done the right way the first time.
Well folks, that should wrap it up for our quick look together. I'm Steven. Thanks for watching.
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Kate F.
3/18/2026
It sounds like a frustrating install Stanislaw, but the holes are actually made that way on purpose. The bolts have splines under the head that are slightly larger than the hole, so when they’re pressed or tapped in, they bite into the hanger and keep the bolt from spinning later on. Because of that, they will feel tight and won’t slide in by hand. These bolts are meant to be installed by tapping or pressing them in with the hanger properly supported, not by pulling them through with the nut. If everything is lined up straight, they should seat with a few solid hits. Trying to draw them in with a wrench will usually just strip the threads before the splines can seat.