Can 3,500 lb Axle of Trailer Be Upgraded to 5,200 lb Axle

Question

Question:

Hello, Can a Carson Trailer car hauler with 3,500# tandem axles 95inch WMS to WMS and 15inch tires be upgraded to 5,200# axles with 16inch tires, with new springs and hardware? Issues are that 1 keep blowing tires and 2 tail on trailer drags everywhere. Thanks,

asked by: Dale G

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Expert Reply:

It's definitely possible to upgrade a trailer's axle rating to a higher rating by just swapping the axles. To pick out the correct axle you'll need to measure the distance between the hub faces and the spring seat centers and you'll know which will fit as a replacement. For example we have the # 6340624-EB which has a distance of 95 inches from face to face and 80 inches between the spring seats. Then for a wheel and tire that would fit that axle we have the part # TA59VR which would fit and work well.

You should note that upgrading the axle capacity does not alway give you more trailer weight capacity as it's not always the axle that is the lowest rated component.

expert reply by: Jameson C

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Answer 1

The first thing to consider is if the axle(s) are actually bent. Trailer axles have a bow in them so they are higher at the center than at the ends. When under load the axles straighten out some. That is part of how they get their capacities. If…

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Answer 2

In order to find the correct replacement axle you have a few options. The first option would be to simply measure the axle you have now and record both the spring center and hub face measurements. The other option would be to look at the axle tag and…

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Answer 3

You can add a heavier axle to the trailer but the rest of the components of your trailer may not be rated for a higher weight capacity such as the suspension components and wheels. If you go from a 3,500 lb axle to a 7,000 lb axle like part #8327834…

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Answer 4

If you are picking out springs for a fabbed up trailer I would go with the more common leaf spring lengths as that will make picking out replacements in future a little easier. For 3,500 lb axles the most common length would be 25-1/8 inches like the…

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Answer 5

There is not a specific torque spec for shackle bolts including the ones in the Tandem-Axle Trailer Hanger Kit part #APT3. They need to be secure but if they are too tight then the leaf springs will bind and cause problems in your trailer's…

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Answer 6

To choose replacement leaf springs you would have to go by the measurements of the old springs and the capacity of the axle (or individual spring). The #e44SR spring measures 25-1/4 inches from eye center to eye center. And it is rated for 2,500…

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Answer 7

While we do have the self-adjusting brakes you need to purchase, the #23-106 and #23-105 that come with the Dexter Trailer Axle - 6K #8327820-EB are manual adjusting. In order to have the same setup with self-adjusting brakes, you need the following…

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Answer 8

There are different replacement mounts for the different sides of your regal style Solera side awning. For the left side - the idler head - you will need the Replacement Mount for Solera Awnings - Idler Head - Regal Style #LC24VR. For the right side…

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Answer 9

Since your tire size starts with the letter P you have a passenger vehicle tire on your trailer which is not ideal since it's not rated for the vertical loads that trailers have. You want a tire size that starts with ST like the ST225/75R15…

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Answer 10

I have a different option for you, but changing the axle tube diameter will not increase the axle capacity as the new weakest link would be the spindles which would still have a 3500lb capacity. You could start from scratch and use two of the #42 E-Z…

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Answer 11

I have an axle that is pretty close to what you're wanting, but is not going to work as the spring center measurement is a bit off and it needs to be just right to work. I do have a solution though. You can get the Timbren Axle-less Trailer…

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Answer 12

The issue with the leaf springs being too bouncy could be caused by a few different things. The first is that they are not properly rated for the weight of the trailer, they are worn down too far, or the trailer is being overloaded. Furthermore, a…

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