Determining Correct Length Replacement Leaf Spring

Question

Question:

when I measure the old spring 25.5 and I see the one you all have is 25 1/4 what should I due. Also my trailer sets very close to the trailer tire can I increac the height I have the right tire size

asked by: Bryan

0

Expert Reply:

Trailer leaf springs can grow longer after many years of use. A new springs that measures 25-1/4-inches long like # e57SR could easily measure 25-1/2-inches after years in service on a trailer. Springs can lengthen as much as 3/4 of an inch. If your old spring measured 25-1/2 you can safely conclude that it is actually a 25-1/4-inch.

Our main leaf spring page is linked for you. Just click on your dimension and axle weight rating to see suitable options.

Generally you want no less than 3-inches of space between the tire's top tread surface and the trailer frame. Odds are that your new springs (always replace all springs at the same time) will lift the trailer slightly thanks to them being stiffer than the old ones.

expert reply by: Adam R

0

Matthew

3/13/2024

I am rebuilding a heavy utility trailer. The trailer was home build. Rust has taking hard at its springs and I would like to replace them. The springs are eye to eye with a length of 41 inches. They are a 1 an 3/4 wide with 8 leafs. I have not been able to find anything online even close.. The trailer is double wheeled with a single axle and walking beams. 5 X 10. Any help would be appreciated. Thanks

Jon G.

3/13/2024

@Matthew There aren't any standard leaf springs that match your 41" eye-to-eye measurement so you're looking at either cutting off and welding new hangers for a shorter set of leaf springs, or going with an alternative suspension type altogether. If you let me know the weight rating of your trailer axles I can make some alternative recommendations for you.

Matthew

3/13/2024

@JonG Thanks for you quick response. Like I said trailer is home built heavy duty. The main axle is 2 1/8 stainless steel. I would guess they harvested the springs from a car or small truck. I have no problem welding new springs on. The trailer pulls up to 2 tons. I will need springs and new hangers, pins etc. If you could give me a recommendation on something close. Thanks again

Jon G.

3/14/2024

@Matthew It's a pretty common thing to take vehicle parts and use them for homemade trailers so you aren't alone. To replace your hangers and leaf springs I recommend the following kits: - Single-Axle Trailer Hanger Kit # APS4 (which will give you 5" or 5-1/2" clearance between trailer frame and axle) - 25-1/4" Long 4-Leaf Double-Eye Spring for 5,000-lb Trailer Axles # e44SR Since you said the trailer pulls up to 2 tons I went with the 5K spring just to make sure we cover the weight of the trailer as well as your loads. For this setup you'll have the hangers spaced out 24-7/8" on center with the bolt holes for the leaf spring.

Helpful Links

tv-review-etrailer-trailer-leaf-spring-suspension-e47sr.aspx

Answer 1

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Answer 2

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Answer 3

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Answer 4

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Answer 5

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Answer 6

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Answer 7

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Answer 8

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Answer 9

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Answer 10

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Answer 11

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Answer 12

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