Can 4,000 lb Axle Leaf Springs be Used on a 3,500 lb Axle for a

Question

Question:

Is it possible to use 2000lb leaf springs on a 3500lb axle. I have a 28’ CrossRoads Zinger 28BH and 1750lb spring bent at eyes

asked by: Grant C

1

Helpful Expert Reply:

Yes, you could use leaf springs for a 4,000 lb axle, like part # e57SR (rated for 2,000 lbs each), with a 3,500 lb axle but it will make your ride a bit more stiff. The only times that a leaf spring would become damaged is if it is overloaded or has a defect from the manufacturer.

Since overloading a trailer is actually a pretty common occurrence I recommend checking to make sure that you are within the weight capacity of your trailer. It is also important to note that even if you upgrade the leaf springs on your trailer to ones that have a higher capacity your weight rating does not increase as you are limited to your least rated component.

Attached is a trailer maintenance schedule that you can use as a guideline to ensure that everything is kept up to date on your CrossRoads Zinger.

expert reply by: Jon G

1

Answer 1

Hello Mark, thanks for reaching out. When replacing leaf springs, it is important the new springs are identical in length to the old ones. There is a small amount of tolerance, like 1/2" or less, but any more than this can throw the suspension…

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Answer 2

Yes the 4,000-lb leaf spring is compatible with a 3,500-lb axle. There are a couple of important measurements. Spacing from eye to eye on the spring when unloaded with no weight on the axle. Inner eye diameter of the spring roll Spring width from…

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Answer 3

Hey Thomas, the most important factors for picking out a replacement leaf spring for a trailer are matching axle capacity and length. Getting the same amount of leaves in the spring pack is actually not a huge priority so I wouldn't worry too…

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Answer 4

You can use leaf springs that are rated higher than the axle without any issues as long as they measure the correct measurement for your trailer. For example the 6-leaf double eye spring for 7,000 lb axles part #e64SR measures 24-7/8" eye to…

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Answer 5

There is no exact way to determine the leaf spring length. The best way to determine the length for a replacement is by measuring the existing leaf springs. The hanger distance and shackle length can help you get a good idea, but you're looking…

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Answer 6

If you are wanting to go to higher capacity leaf springs I would advise against it. The problem is that since the trailer axle is rated for 3,500 pounds you won't gain any additional capacity by switching to higher capacity springs. What it will…

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Answer 7

Great question, Brian! The bushings that fit on the bolts for the shackle straps tend to wear out a bit faster than the ones that connect your leaf spring directly to a hanger which is why there are only 4 bushings in the Dexter Heavy Duty Suspension…

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Answer 8

Turning the wheel so that the teeth on the wheel move upward will expand the brake shoes against the inside of the brake drums. Moving the teeth downward will contract the brake shoes. You can see the adjustment procedure by clicking on the video…

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Answer 9

Over time, any suspension components can fail and need to be replaced. Since you said a shackle broke now would be a good time to inspect all of the suspension components and replace any that show signs of damage or uneven wear. It is always best to…

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Answer 10

If what you have now Chad is pretty flat at 26 inches then the best replacement size would be 25-1/4 inches like you mentioned. Since you wanted to increase the capacity you would want the part #e57SR which is for 4k trailer axles.

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Answer 11

It is possible to upgrade the leaf springs on a trailer to a higher rated set but I do not recommend this as it can create a rough ride. The better option would be to install the SumoSprings Trailer Helper Springs part #TSS-107-40 for overslung or…

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Answer 12

You can upgrade the 1750 lb leaf springs to 2500 lb leaf springs. You do want to keep in mind that the ride may be a bit stiffer since you are upgrading your springs to a higher capacity. Like you mention upgrading the springs will not give you a…

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Can 4,000 lb Axle Leaf Springs be Used on a 3,500 lb Axle for a

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