How to Determine Square Trailer Axle Capacity

Question

Question:

I have a trailer frame that was given to me but I cant find any specs on the axle to know the weight ratings. They are 6 lug rims and one of the axles has brakes with a 12inch drum. I have enclosed pictures to see if that will help. The axles are solid steel and appear to be 1 3/4 square.

asked by: Stanley

1

Helpful Expert Reply:

Square axles can be tough to determine capacity.

However, most 12 inch brake drums that have 6 lugs have between a 5,200 and 6,000 lb rating so it would seem you have axles with around that capacity. Those leaf springs are very thick as well.

expert reply by: Jameson C

1

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Answer 1

The 2x2 inch square axle is likely 3,500 lbs or less capacity. I would need more spindle dimensions or bearing numbers to assist. If you pull a hub and measure at the spindle where the bearings and seal ride using the digital caliper like #PTW80157 I…

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Answer 2

Before you can pick out a set of leaf springs for your boat you need to find out the weight rating of your trailer axle. Then you will need to purchase leaf springs that are each 1/2 of the axle rating. The #SP-210275 is rated for 1500 pounds so if…

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Answer 3

Square axle capacities are pretty hard to determine. Unlike round axles, they do not have set capacities based on their dimensions. But what you can do is give me some exact measurements of your spindle and we should be able to see if there is a hub…

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Answer 4

The #SP-210275 you were looking at is for a 3500lb axle and is 27" long measured from center of spring eye to center of spring eye. This is the correct spring for your trailer based on the measurements you provided. The next shortest spring…

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Answer 5

The tire/wheel combo we offer that has a 6 on 5-1/2 bolt pattern and has the highest capacity is the Dexstar ST225/75R15 Radial Tire With 15 Inch Wheel, part #AM32680. This is a Load Range E tire that has a weight capacity of 2,830 lbs at 80 psi. If…

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Answer 6

I did some checking and the hub/drum we offer that will work for you is the part #8-430-5UC3. This uses the same bearings as the 8-415 and will be an exact fit aside from the fact this is a non-ABS setup and the 8-415 came in an ABS setup and non-ABS…

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Answer 7

I've never heard of an actual third brake light connector on a camper shell to plug in on a truck and we don't carry any parts to do that. The light generally needs to be hardwired into the truck's brake light circuit. The issue with this…

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Answer 8

The manual lockout on your Atwood 85778 surge brake coupler is there so that you can back up the trailer without the brakes locking up on you. Yes you can safely tow your trailer with the broken manual lockout, you just have to make sure you…

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Answer 9

If you are needing the hub and drum assembly then you will want to go with the Dexter Trailer Hub and Drum Assembly #8-201-5UC3-EZ but if you are just looking for an idler hub then you will want part #8-213-5UC1 instead. These come with the correct…

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Answer 10

If the trailer wheels scrubbed (dragged and scrapped the ground instead of rolling) when jack knifed then it could have thrown something out of alignment or damaged something. First, inspect the suspension. Look for any elongated holes where…

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Answer 11

Since you have a wheelbase/axle spacing of 38 inches the correct hanger kit for slipper springs would be the part #HAP-105-205-01. And then for a 7k trailer axle the u-bolt kit you'd want would be the part #APUBR-8. I attached the diagram to use…

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Answer 12

If your vehicle has a factory brake controller plug, you can simply use the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers – Ford, Item #3034-P, which will connect to the vehicle plug and the brake controller. On the new E-450…

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How to Determine Square Trailer Axle Capacity

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