What Rough Hanger Spacing Should Tandem Axle Trailer with 25-1/4" Springs Have?

Question

Question:

I have some trailer hangers that Im going to replace, there 25 1/4 springs on a tandem trailer. the axles are 3 and Im mounting the the axles on the bottom of the spings. I know there is a a lot of differant combinations, but can you give me a ball park distances between the hangers Thanks Andy

asked by: Andrew B

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Expert Reply:

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 7-3/4" equalizer and 25-1/4" spring this would give you 33" axle spacing which is pretty standard.

Keep in mind this is not an exact thing, you really want the shackles on the equalizer to be shaped like a W shown in the picture below, and you may need to move the hangers closer together or further apart to get this. Failure to do this will limit either the upward or downward travel of your suspension.

expert reply by: Samuel C

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How Shackles On Equalizer of Tandem Axle Trailer Should Be Pointed
(click to enlarge)

Answer 1

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 2

Thank you for submitting the photo of your boat trailer showing the center spring hanger, shackle straps and equalizer. Based on the photo it does appear that non-standard replacement parts may have been used to repair or modify the suspension at…

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Answer 3

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 4

The hanger spacing for the #APT4 with 25-1/8" leaf springs is 27-3/4" on center. I have attached a drawing for your reference.

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Answer 5

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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Answer 6

The position of the axle should dictate the position of the springs and hangers not the other way around. With that being said, in order to determine proper placement of the hangers you will want to take the the distance between the two eye holes on…

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Answer 7

The hanger kit I recommend is part #APT3HD which includes front, center and rear hangers, equalizers and bolts. This kit is good for axles up to a 7K rating and most 3-inch diameter axles are rated for 6000 to 7200-lbs. The linked video will let you…

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Answer 8

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 9

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 10

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 11

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 12

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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What Rough Hanger Spacing Should Tandem Axle Trailer with 25-1/4" Springs Have?

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