How to Measure Trailer Leaf Spring to Find Correct Replacement

Question

Question:

How do I measure the length of utility trailer springs, straight across or along the curve? The ones on there now measure 32 1/2 inch along the curvature from the center of one bolt hole to the center of the other bolt hole.

asked by: Cliff C

1

Helpful Expert Reply:

To correctly measure a leaf spring, you'll want to jack the trailer up on jack stands so the axle is hanging freely, then measure directly across from the center of one spring eye to the other, as shown in the provided diagram. The height of the spring and the distance from the spring eye to the center of the spring can also be helpful in finding the correct replacement.

To ensure you're getting the correct leaf springs, you'll also need to know the capacity of your axle. If you can find that information on the axle itself, we can make a pretty good guesstimate if you can provide as much as the following information as possible:

Axle diameter (or circumference divided by 3.14)

If the axle is 1 to 1-1/2 inches in diameter, it's likely a 1000 lb axle
2-3/8 in diameter, 3500 lb axle
3 inches in diameter, 6000-7200 lb axle
3-1/2 inches, 8000 lb axle
4 inches, 9000 axle
5 or more, 10000 lb axle

Knowing the wheel bearing reference numbers or the wheel's bolt pattern will also be a good clue to the axle capacity.

expert reply by: Mike L

1

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Tim K.

7/30/2020

I've done measurements. 25 from eye to eye. 1and 3/4. Wide 8 lugs 7 springs. It's a 40fr toy hauler Any suggestions would be greatly appreciated. No one and here has anything like that

Reply

Chris R.

8/10/2020

We do have some leaf springs available that closely match the length you measured. It's important to keep in mind that leaf springs will stretch a bit over time, so you're likely wanting a new set that's just a little shorter in length. A 24-7/8" long set like # SP-222275, which is designed for 5,300 pound axles, would work great. If you can tell me what capacity your axles are I will be happy to verify this will work or suggest an alternate replacement.

Reply

Randy W.

5/6/2021

@ChrisR Dear Chris R I have a 1988 prowler lynx 18' dual axle travel trailer. It has 3 leaf leaf springs the weight is 2880. The sticker on the axle says 2500 lbs. can not find the size anywhere for our camper due you have any idea.

Reply

Jon G.

5/6/2021

@RandyW If you can get me the dimensions like what Mike talks about in his answer above I can see if we have something for you. Unfortunately we don't have a way to see what initially came on your trailer.

Reply

See All (8) Replies to Tim K. ∨

Answer 1

I can help you determine the right replacement double-eye leaf springs for your Keystone Hideout, though we don't have any way of knowing what specific ones you need. It's pretty easy though, as all you need to do is measure your…

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Answer 2

The MORryde X-Factor Crossmember Adapter Kit for Correct Track Hangers part #MR93WR which is designed to be used with the MORryde X-Factor Crossmember for Standard Frame Hangers part #MR33WR is used on the outside hangers for trailer's with…

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Answer 3

For a triple axle trailer you would need four of the MORryde X-Factor Crossmembers #MR33WR. These are compatible with the CRE30000 equalizers you have as well.

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Answer 4

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 5

The 4-Leaf Double-Eye Spring part #e44SR is what I recommend using to replace your Dexter Leaf Spring 072-078-00. It's the same length but a slightly higher capacity, 4,400 lbs vs. 5,000 lbs which is not much so it won't really affect the…

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Answer 6

While I cannot determine exactly what leaf springs you need I can tell you your Dexter 5,200lb axles uses the Bearing Kit #BK3-300 for each hub. If you can provide me with the serial number on the axles you have I can contact Dexter to verify the…

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Answer 7

Typically leaf springs will stretch around 1/4 of an inch or so when they are worn out but if the springs are 30 years old I could see it easily being 3/4 inch instead. So based on yours currently being 26 inches long and 30 years old your best…

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Answer 8

We offer a range of leaf springs, both double-eye and slipper types, in several lengths near your 26-inch measurement. I have linked you to our main page for trailer springs. When you click on the product link you will see all 4 leaf springs near 26…

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Answer 9

Dexter doesn't actually make a 4k rated axle, but they do make a 4.4k axle which has a diameter of 3 inches. The next smaller axle is a 3,500 lb axle which has a 2-3/8 inch outer diameter.

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Answer 10

In terms of lengh and capacity the best option we have is the 4,500 axle part #e27SR which is 26 inches long and is a 6 leaf setup. Springs tend to stretch a little bit over time so your old ones measuring 26-1/4 inches would be ideal for this…

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Answer 11

The 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long #e48SR is a good replacement for your boat trailer as it meets all of the specs and is compatible with an axle that's just a little higher when it comes to weight rating.…

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Answer 12

If your eye diameter is 9/16 of an inch, then I recommend the Redline #e27SR leaf spring. I would double check the other measurements listed for this spring to ensure fit on your trailer, but this will work for your higher axle capacity and…

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How to Measure Trailer Leaf Spring to Find Correct Replacement

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