Replacement 2-1/4" Shackle Strap Recommendation

Question

Question:

Can you tell me for sure the sku tpu5212 shackle measurements are. I have some that measure 3-3/8 overall 1-1-4” wide and holes 2-1/4 on center from center of hole to center of hole. Also does the bolt measure 3” with out the head. I would need 8 sets of this would work for me. Thanks for your time.

asked by: Vinnie M

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Expert Reply:

For your application I recommend checking out the Shackle Strap # TRSL225 which is 2-1/4" apart for the bolt holes, has an overall length of 3-1/2" and a 1-1/4" width like what you're looking for.

We don't carry the TPU5212 kit but from what I'm seeing it looks like a whole kit so for a whole replacement kit I recommend the MORryde Suspension Upgrade Kit # MR58ZR which comes with bolts, shackles, and bushings for a tandem axle trailer.

expert reply by: Jon G

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Answer 1

Since suspension components use lock nuts on the ends of the shackle bolts and the bolts need to be able to allow movement you actually don't want to torque down the bolts at all. You want to snug them up so that there's no lateral play but…

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Answer 2

In regards to measuring shackle straps, you don't need to remove them to measure accurately. If they are still installed on the trailer simply measure from the center of each bolt head, the two most common are 2-1/4" part #TRSL225 and…

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Answer 3

You would be fine to use the Dexter Heavy-Duty Suspension Kit for Tandem-Axle Trailers #K71-449-00 that you referenced which has shackle straps that are 1-1/4 inch shorter than what you have now. The ride height of the trailer would lower slightly…

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Answer 4

All of the tandem axle hanger kits for double-eye springs use 2-5/8 inch or 2-1/4 inch long shackle straps. The length is taken from the center of one eye to the center of the other eye. The overall length of a 2-5/8 model is just under 3-1/2 inches.…

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Answer 5

Trailer manufacturers don't usually keep a record of parts like these that they install at the factory, so I cannot be sure as to the exact length of the shackle strap that would have come originally on your trailer. With this in mind, a 3-1/8…

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Answer 6

Since your hangers are the same size you will just want to match the new shackles to your original shackles as that is how the suspension was setup from the manufacturer. With that said since there is only a 1/4" difference between the…

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Answer 7

Sounds like you are experiencing a lot of movement in your suspension which is causing the elongation of the back hanger bolt holes. Over time this is going to happen with normal wear, but most likely the wider hangers and narrower springs are…

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Answer 8

Well shackle length is mainly based on the height difference between the front and rear hangers. The rear hanger normally doesn't hang as low as the front so that the shackle can offset the difference and add the ability to move. What is the…

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Answer 9

The wet bolts that come with the Dexter Heavy-Duty Tandem-Axle Trailer Suspension Kit #K71-449-00 are not splined. They are totally smooth. I attached a picture of what they look like. Splines are typically used for studs to help prevent it from…

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Answer 10

We offer 15" diameter wheels in five different bolt patterns; 4 on 9.44" (uncommon), 5 on 4-1/2" (common), 5 on 4-3/4" (uncommon), 5 on 5" (semi-common), and 6 on 5-1/2" (common). In order to determine which bolt pattern…

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Answer 11

I wouldn't worry about the trailer not having fenders. I've pulled a few enclosed trailers that were missing fenders and it didn't affect anything that I noticed. If you get a puddle or it starts raining the tires will fling water so it…

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Answer 12

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Replacement 2-1/4" Shackle Strap Recommendation

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