Confirming Correct Leaf Spring Size Measurements

Question

Question:

This is the right style of spring I need. But with a tape measure from the center bolt hole to center bolt hole I measure 26 inches. Is this the correct spring to use?

asked by: Charlie B

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Expert Reply:

It sounds like you already have done the correct center of one eye to the center of the other eye measurement. If your measurement is slightly off, sometimes the leaf spring may still work as leaf springs do expand by as much as 3/4-inch over time. Since you measured 26" and the 4-Leaf Slipper Spring w/ Open Eye End for 4,300-lb Trailer Axles # e33SR is already 26-1/4" long, you will want a shorter option though I don't see we have that in an open eye end style of spring.

expert reply by: Patrick R

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Answer 1

We have the 4-Leaf Spring C-Hook Spring, #e33SR, that measures 26-1/2 inches from center of the bolt eye to the edge of the C-hook. See attached picture diagram. Unfortunately, we do not have a spring with only 3 leafs in this style leaf spring.

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Answer 2

I did some research and for a 2-inch square axle the rating can be between 2,200 to 3,500 lbs. It sounds like the tag on your trailer axle falls within that range. The 4-Leaf Slipper Spring, part #e33SR you asked about is designed to work with…

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Answer 3

For a single axle slipper spring hanger kit to be used with the slipper spring part #e33SR you'd want to use the part #APS3SE.

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Answer 4

For a 26-1/4 inch long slipper spring that is 1-3/4 inches wide we have a spring that is going to be way overkill with capacity as the part #e33SR. This has a 4,300 lb capacity. The best option would be the part #SP-177275 with you moving your…

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Answer 5

For the spring eye you would use the Spring-Eye Bolt with Locknut for Slipper Springs - 3-1/2" Long #166079, but slipper springs don't have the second spring eye, so a bolt is not used on the back end. You can also use a wet bolt like…

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Answer 6

With slipper springs you will want the eyes of the spring facing the front of the trailer and the open end facing the back. I attached a help article on slipper springs for you to check out as well.

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Answer 7

I went to the warehouse and measured the Spring #e33SR Slipper Spring and I have the measurements posted in the picture. From the ground to the top of the bolt it is 6-1/4 inches. From the ground to the top of the top leaf it is 6 inches and from the…

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Answer 8

Yes, slipper spring #e33SR is the same as Universal Group part UNA-264. This is considered an open slipper spring. I he also included a link to our help article on slipper spring suspension for you.

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Answer 9

It sounds like the 4-Leaf Slipper Spring w/ Open Eye End #e33SR could be what you are looking for. Over time leaf springs can stretch so this one being 1/4" shorter than your current leaf spring is most likely correct. This leaf spring is rated…

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Answer 10

Hello Paul, great question. The shackle bolts cannot be tightened too much. There is no torque rating for these bolts because tightening them too much can cause the suspension to bind up. The nuts are to be tightened until the knurled portion of the…

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Answer 11

We do have a selection of slipper springs that are 1-3/4" wide which I have linked for you to check out. The one that is closest to the size that you mentioned is the 4-Leaf Slipper Spring #e33SR which is rated for 4,300 lb trailer axles. It…

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Answer 12

Thanks for the picture! The spring shouldn't hit the frame like yours does in the picture, so the correct solution would be to either add a longer front hanger or using a shorter spring. The correct replacement hanger will be dependent on the…

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Confirming Correct Leaf Spring Size Measurements

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