Tandem Axle Trailer Hanger Spacing for 25-1/4-Inch Double-Eye Springs

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Question:

I am building a trailer with tandem axles, spring length from center of hole to center of hole is 25 1/4 the equalizer is 7 3/4 what should the measurement from front hanger to equalizer hanger to back hanger be Thanks

asked by: Dan

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Expert Reply:

For a tandem axle trailer using 25-1/4-inch double-eye springs like # e57SR and a 7-3/4-inch equalizer like # TREQE1 the hanger spacing should be approximately 29-1/2-inches. This is a starting point and you may need to adjust this dimension slightly.

expert reply by: Adam R

0

Answer 1

To start with, the 6,000 pound springs I suggest are #e34SR. They're 25-1/4 inch long, 5 leaf springs. I recommend either hanger kit #APT3 or #APT5 with the springs. The difference between the two hanger kits is the height of the hangers. With…

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Answer 2

It all depends on the spring being used, the shackles, and the equalizers among other things. There are some suggested hanger spacing measurements but really you would mock it all up first before permanently welding the hangers in place. For example,…

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Answer 3

The distance on center between the spring hanger bolt holes for dual axle setups, with the #APT9 Tandem-Axle Trailer Hanger Kit, should be 29-1/2 inches for double eye springs that measure 25-1/4 inches on center between the spring eyes and for axles…

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Answer 4

The suspension kit that would be the closest to what you have on your trailer would definitely be the Tandem-Axle Trailer Hanger Kit #APT9. The minor dimensional differences would not cause an issue. Since the equalizers would be 3/4 of an inch…

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Answer 5

Front and rear springs hangers should be equally spaced around the center hanger and spring equalizer. It may be that your trailer was modified (if not originally built) with a different height center hanger and that might be how the spacing became…

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Answer 6

When setting up a new trailer suspension it is best to do a mock-up (by clamping or tack welding the parts in place) to allow you to see how the system functions. There are so many variables that is best to test. Typical spacing dimensions for…

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Answer 7

As long as you are replacing everything (hangers, springs, hardware, equalizer), then yes, you can use our trailer suspension kit, #APT5. In fact, this is the kit that I recommend for your trailer. The hangers must be welded to the trailer. The holes…

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Answer 8

It is possible to have a center spring hanger that will be longer than the front and rear hangers. For an example I would have the Tandem-Axle Trailer Hanger Kit for Double-Eye Springs, part #APT3HD. This kit has 2-1/2 inch tall front and rear…

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Answer 9

For a tandem axle trailer using 25-1/4-inch double-eye springs like #e57SR and a 7-3/4-inch equalizer like #TREQE1 the hanger spacing should be approximately 29-1/2-inches. This is a starting point and you may need to adjust this dimension slightly.

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Answer 10

The Dexter Heavy-Duty Suspension Kit for Tandem-Axle Trailers #K71-359-00 is ideal for 33" axle spacing but since the shackle straps are able to rotate they can be used for varying axle spacings that are near that 33" mark. The best thing…

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Answer 11

Assuming you're using a 7-3/4" equalizer like what's included in the Hanger Kit #APT5, your hangers should be roughly 29-1/2" between the front and center hangers, and also 29-1/2" between the center and rear hangers. With a…

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Answer 12

When using the equalizer kit part #K71-359-00 with leaf springs that measure 25-1/4 inches long like the part #e28SR the hanger spacing you'd want to use is 29-1/2 inches.

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Tandem Axle Trailer Hanger Spacing for 25-1/4-Inch Double-Eye Springs

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