Comparing Different Leaf Spring Sizes for 3500 Lb Trailer Axle

Question

Question:

I am trying to replace the springs and hangers on a 3500 pound axle. I would like more info on the difference between the 27 inch and 25 1/8 inch 4 leaf springs. I would also like to know the differences in the hanger sizes

asked by: Bradley O

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Expert Reply:

The difference between the two spring lengths really just comes down to what the distance between the hangers is on the trailer. There isn't an advantage to a longer or shorter spring so it's best to just match the length with what the trailer calls for.

The more common size is definitely the 25-1/8 inch part # e54SR over the 27 inch long # SP-210275.

expert reply by: Jameson C

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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

Hey Brandon, the equalizer kit part #K71-449-00 will most likely work for you still but you'll want to measure the equalizers you have now to be certain. Measure the distance between the bolt hole centers of what you have now and if the are 7-3/4…

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Answer 3

By using longer shackle straps it will have an affect on your suspension. For a tandem or triple axle trailer it will move the leaf spring closer to the frame and may cause the leaf spring to contact the frame as the suspension articulates. On a…

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Answer 4

Hey Caleb, so generally what you see is that on lower capacity trailers the wheelbase between the axles is 33 inches and above like 6k or so the wheelbase most commonly seen is 35 inches. This just works out the easiest and corresponds with how most…

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Answer 5

When replacing shackle straps they should be the same length as the ones that were previously on your tandem axle trailer (if possible); replacing them with longer straps will result in additional play in your trailer suspension which could lead to…

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Answer 6

The Dexter Heavy Duty Suspension Kit #K71-360-00 is designed for 33" axle spacing. Since your current spacing is 34" this kit should fit just fine with your current hanger spacing. I have attached a picture showing what this kit should look…

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Answer 7

The correct replacement for a Dexter 13-10 Equalizer is the Triangular Equalizer part #TREQ310, not the Curved Equalizer part #TREQE1. If you want to upgrade, the Equa-Flex Cushioned Equalizers part #LC279688 would work but you might want to go with…

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Answer 8

Hey Bob, yes a longer shackle would add some additional angle but if yours are already at 3 inches in length there's not much longer you can go. Typically you'd want to go with a longer spring by just a little bit to get that extra angle. I…

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Answer 9

I would be happy to help you figure out the axle spacing when installing your axles on your dump trailer. Since you are using a 30-1/4" double eye spring we do not have an exact axle spacing measurement as that is quite a bit longer than the…

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Answer 10

In the attached diagram the A measurement is actually the distance from the center of the spring hangers for a single axle trailer. The spring eye to spring eye measurement for your leaf springs will be slightly different. The B measurement that you…

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Answer 11

No, the bolts while being tightened down should not cause the hangers to bend inward towards the leaf. This will weaken the hanger and potentially cause it fail. You will need to get new hangers to match your leaf springs or new leaf springs to match…

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Answer 12

Spring Hanger location dimensions are normally figured by the manufacturer and provided with the spring hanger kit, that includes all of the parts for installing the springs on the trailer frame. I have provided a chart that shows the spring hanger…

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Comparing Different Leaf Spring Sizes for 3500 Lb Trailer Axle

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