Axle and Suspension Hanger Placement on Tandem Axle Trailer

Question

Question:

I am building an enclosed trailer for a mobile kitchen the box is 3mx2m and the entire length is 4.8m and I want to use two axles and I want to determine the distance to place my axles from the nose /coupler and the spring setup the spring is 27inch 4 blade, for 40mm 1200kg axle. Please help

asked by: Victor

1

Helpful Expert Reply:

The placement of the axles is going to depend on the gross trailer weight. I have included a picture that shows how to determine where the center point should be between the axles.

Placement of the hangers is going to require mocking up the hangers to determine where they are going to fit. But as a guide you can use the following as a starting point:

Distance between front and center hangers and between center and rear hangers, approximately 29-1/2 inches (74.93 centimeters).

expert reply by: Michael H

1

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Answer 1

I would need to know the axle capacities to be sure but I can venture an educated guess. The only tandem axle double-eye leaf spring hanger kit we have that includes 8 inch equalizers is #APT1. With this kit, the center of the forward hanger to the…

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Answer 2

Thank you for providing the specs for the suspension components that you already have. Correct hanger spacing really depends on the components being used such as springs, hangers and equalizers. Most of the hanger spacing dimensions that we have are…

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Answer 3

A lot of it depends on the length of the springs and equalizers that are used. When using Leaf Springs #e64SR with the #AP233 Equalizer Kit and the #H248 Hanger Kit, there should be 29-1/2" between the front and center hangers and 29-1/2"…

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Answer 4

Thank you for purchasing from etrailer! You did a great job selecting compatible parts. When using Leaf Springs #e64SR with the #AP233 Equalizer Kit and the #H248 Hanger Kit, there should be 29-1/2" between the front and center hangers and…

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Answer 5

On a spring that is 26 inches eye to eye on center and a single axle trailer you will want the hangers to be up to 1/2 inch less than the spring length so 25-1/2 inches on center between the front and rear hangers. For the ideal axle position you can…

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Answer 6

Having 5 inches above the trailer tire or no less than about 4 inches when the trailer is loaded is perfect. A leaf spring suspension will allow the axle to rack to a certain degree, so to prevent the tires from rubbing I'd allow the same 4-5…

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Answer 7

Since old springs tend to stretch and flatten as they wear out and yours measures 23-1/2 inches the 23-1/8 inch part #e59SR would actually work.

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Answer 8

In order to pick out the correct springs we need a couple pieces of information. The length of the spring without a load on it and the axle capacity needed. Your springs being totally flat does indicate that you need to replace them but I would need…

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Answer 9

The closest leaf spring option we have would be the spring part #e59SR which is a 3,500 lb axle leaf spring that is 23-1/8 inches long. You'll have to move you suspension hangers to accomodate the longer springs but this will work well for you.

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Answer 10

I'm assuming that you're wondering how much the leaf springs flatten out over time. Usually it won't vary by more than 1/2 inch or so, but there's a sure way to get an accurate measurement. The best way to get an accurate length…

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Answer 11

If your 1984 Prowler Trailer has 3,500 pound axles, I recommend sticking with a 3-Leaf spring like the 3-Leaf Double-Eye Spring #e59SR to replace your 23-1/4 inch springs. This leaf spring measures 23-1/8 inches from eye to eye, which will give you a…

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Answer 12

A leaf spring should be replaced if it is badly rusted, has cracks or breaks in its leaves or if it is sagging. A 14-year-old travel trailer could certainly be in need of new leaf springs. The keys to selecting correct replacement leaf springs are to…

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Axle and Suspension Hanger Placement on Tandem Axle Trailer

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