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Shackle Strap - 3-1/2" Long

Shackle Strap - 3-1/2" Long

Item # TRSL350
Our Price: $9.56
Trailer Leaf Spring Suspension
Shipping Weight: 0.31 lbs
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3-1/2" Long shackle link connects double-eye leaf spring to the rear hanger or equalizer on trailer suspension systems. Shackling the 2 components together instead of bolting them directly allows for the necessary pivot of the springs. Great Prices for the best trailer leaf spring suspension from TruRyde. Shackle Strap - 3-1/2" Long part number TRSL350 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (121)
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TruRyde Trailer Leaf Spring Suspension - TRSL350

  • Shackle Links
  • Camper
  • Car Hauler
  • Utility Trailer
  • 3-1/2 Inch Long
  • TruRyde

3-1/2" Long shackle link connects double-eye leaf spring to the rear hanger or equalizer on trailer suspension systems. Shackling the 2 components together instead of bolting them directly allows for the necessary pivot of the springs.


  • Link connects double-eye spring to rear hanger of single-axle trailer or equalizer of multi-axle trailer
  • Connection allows movement to take place, ensuring an evenly distributed load between axles


  • Length: 3-1/2" from center of hole to center of hole
  • Overall dimensions: 4-3/4" long x 1-1/4" wide
  • Bolt hole diameter: 9/16"


SL-350 TruRyde 3-1/2" Long Shackle Link

Video of Shackle Strap - 3-1/2" Long

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Review of TruRyde Trailer Leaf Spring Suspension - 3-1/2 Inch Long Shackle Strap - TRSL350

Hi everybody. Andy here with Let's take a brief look at this shackle strap. Now, this three and a half inch long shackle strap is going to connect your double eye spring to your rear hangar of your single axle trailer or your equalizer on your multiaxial trailer. This connection, as you no doubt know, is going to allow movement to take place, ensuring an evenly distributed load between the axles. This is made of durable steel and shackle.

strap lengths are measured from the center of one bolt hole to the center of the other. So lining up my ruler here, as you can see on center, we're sitting right at three and a half inches, center to center, and that bolt hole diameter is 9 16ths of an inch. And if you're interested, the overall length of our strap is right at four and three quarters inches long, edge to edge, and then the overall width, we're sitting at one and a quarter inches. Well, that's gonna wrap up our real quick look today. I do hope that it was helpful for you.

Again, my name is Andy, thank you for joining me.

Customer Satisfaction Score:

Customer Reviews

Shackle Strap - 3-1/2" Long - TRSL350

Average Customer Rating:  4.8 out of 5 stars   (121 Customer Reviews)

3-1/2" Long shackle link connects double-eye leaf spring to the rear hanger or equalizer on trailer suspension systems. Shackling the 2 components together instead of bolting them directly allows for the necessary pivot of the springs.


Only received 1. Parts are a 5, delivery options questionable.Can't delivery 10 pounds of metal in a paper mailer. Was tore open on the bottom. I run a mailing business and I can tell you its not that much more expensive to use a box.

Etrailer Expert

Jenny N.


Oh my goodness! I am sorry that it arrived missing 4 of these shackle straps. Customer Service will be in touch with you so we can send them out.


To me a shackle is made of 2 pieces. It is unusable with only 1 piece. $X.XX for half a shackle is overpriced, then they add insult to injury by charging $5 shipping.

Etrailer Expert

Jenny N.


Our manufacturers have typically sold the shackle straps as single straps unless they are part of a specialized kit. I was not sure what the second piece would be that you are looking for? Would it be a shackle bolt like part # 166081?


very pleased with the springs i purchased,trailer towing is excellent.


These are way overpriced. I found them elsewhere for $x.xx each.


Very good and reliable company. i searched for parts from many other suppliers and they all sent me the wrong parts. I found what i was looking for here and I got my package 2 days sooner than expected. will be ordering from here again!!


It fit perfectly but it actually used it for a shackle on a hit rod I’m building . That car is a sebring 3000 mx with pinto leaf springs. Just so happens the shackle strap fit the shackle perfectly.when you build a hot rod you always open your mind to found what works. A trailer part on a car made sense .


The shackle and bolts fixed my problem .Original shackle had pointed or right angle corner and the trailer hung up.
The new shackle had a radius corner and didn't catch the frame.
Works great


As usual, fast service with no mistakes. Correct parts shipped as ordered. Great communication with Alex


good product


Purchased replacement springs, equalizers, shackles and all the needed hardware to put it all together for my tandem axle boat trailer. While I was trying to figure out all the parts I needed on-line, I made a couple calls to etrailer's customer service and they were awesome! Parts arrived quickly and are exactly what I needed. I put together one of the spring / equalizer / spring set-ups and placed it on the trailer frame to confirm fit. Perfect! Looking forward to swapping all the parts out this weekend. And I'll be shopping with etrailer again soon to get a trailer hitch for my new Durango!
Thanks etrailer!


Everything was what was expected and the delivery was on time. I will always look to etrailer for my trailer parts. I built a trailer from scratch and it was etrailer that helped build it.


I wish the shackle bolts came out as easy as ordering the parts!!!!
Jean at etrailer made it simple,answered all my questions and advised on some other items I would need to complete the job.
The parts arrived quick and everything was there. The shackle straps were heavy duty not light metal junk. The bolts and springs were also of the same quality.
Etrailer is trailers I highly recommend them you won't be disappointed.
Thanks again Jean.
Paul S

Paul S.


So far so good never realized my old springs were so bad till I installed Etrailers parts.Thanks again, Paul S


I can't say enough good things about the product or service. The order was shipped within a couple of hours of being placed and arrived 3 days early. This was important because I was stranded far from home. The sales help was great. The new leaf springs really improved how the trailer feels on the road. The picture is of my sheep wagon trailer at my hideaway in New Mexico after driving 1900 miles including highway speeds of 75 mph as well as crawling up jeep trails in four wheel low, the new springs took it all in stride.

Dave H.


No problems at all. Since I last commented I have taken it to California, numerous trips around California, to Idaho and back. I spend a lot of time on washboard gravel and dirt roads. Last week I had the tires replace and the springs looked perfect.


Very happy with the service I received, will purchase again!


Thought these might work but too short for the intended application. I needed a longer shackle to improve the clearance for the tire from the fender wheel well.


These are very solid steel. But I didn't order them to use as spring shackles, but for steel straps such as for the bottom side of a U bolt. I also needed to replace a tongue jack mounting bracket but didn't want to buy an entire mounting kit (as suggested by an etrailer "expert") so I used this instead. You can see by the attached photo that they do a better job of mounting the tongue jack by not hanging down below the trailer tongue as the factory brackets do. But they do need to be painted--which is no problem since the zinc coated ones would also need paint eventually (unless you don't mind the rust). I bought several in various sizes for mounting stuff to my trailer tongues and for other projects.


It was easy to order the parts, they came as predicted and it was an easy installation. Thanks for having the 3.5" shackles available when I needed them.



You are the first person or company that has asked how things worked out after use for some time. What an exceptional idea and likely good for understanding any real issues with the item. In this case the shackles gave me the extra 14 ground clearance that I needed and I have had no more problems with tires hitting the fender on off road driving. They were install on a small 10 home made enclosed trailer.


The old and new. Got over 12 years from the first ones.


Even with the product taking almost a month to arrive I gave Etrailer 5 stars... UPS lost my package and never admitted to it saying that it was USPS’s fault. Karen, at Etrailer, was very helpful with contacting UPS to try and figure out what happened, and ultimately re-shipping the items. After they arrived, they bolted directly to my existing enclosed trailer with no problem. Thanks again Karen!


Needed to raise my frame on a pontoon trailer for a little more tire to fender clearance. Going from a 2" shackle strap to this 3 1/2" worked perfect. Good quality and shipped fast.

by: has made the repair of my trailer very easy for me by supplying me with high quality parts at reasonable prices. They packaged the parts carefully and shipped quickly. I will no longer look anywhere else when I need trailer parts. This is a one stop and shop great place to do business. Thank You Etrailer, Dave


Hello etrailer; Previously I mistakenly ordered the wrong size. I called and CAROL C. found the correct item in a matter of minutes and followed thru with getting it shipped that same afternoon. Thank you Carol for your professionalism and knowledge of products. [ ]


Good value for the price. Started rusting within days of installation so take the time to rattle can if you hate rust like I do!

Etrailer Expert

Sierra K.


I have attached a rust prevention help article with some tips in it:


Great product, work like a champ. Excellent machining standards allowed for easy install. End result is more clearance in the wheel well.



Work great, hauled many heavy loads with no issues . Recommend


Bought these to raise the trailer a touch. Easy to install. Fast shipping & response. Also bought new bolts 7 locknuts. Bought new bushings just in case but didn't need them. Well satisfied with my purchase.

Show More Reviews

See what our Experts say about this TruRyde Trailer Leaf Spring Suspension

  • How Many Come When You Order the TRSL350 3-1/2" Long Shackle Strap
    The # TRSL350 shackle strap is sold in quantities of 1, so you would need to order however many you need to replace on your 2008 CrossRoads Cruiser.
    view full answer...
  • Replacement Trailer Springs and Shackle Straps for EZ Loader Boat Trailer
    We carry 4 double-eye springs that are 26 inches long. I've linked our selection for you to check them out and choose the weight capacity you need. Shackle straps that are 5-1/4 inches center on center is very long. The longest we carry is only 3-1/2 inches, part # TRSL350. I recommending replacing the ones you have with shorter straps.
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  • Thickness of Shackle Strap part # TRSL350
    The thickness of the shacke part # TRSL350 is 1/4 inch.
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  • Fender Placement Consideration When Upgrading Axles on Trailer
    Fender placement is going to depend on the specific application. There isn't a set amount you would need to move it when going to higher rated axles. You will need to consider the taller rims and tires you will be using plus the deflection of the suspension when it compresses. In most cases spring deflection is 1-1/2 inches when it is at capacity. You should note that when going to higher rated axles you don't necessarily raise the total capacity of the trailer. The capacity of a trailer...
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  • Recommendation For Keeping Shackles From Flipping Up On Uneven Terrain
    Longer hangers will not prevent the shackles from flipping. If this has always happened or if the springs are new then they are too short. If it happens only when your trailer is empty then not enough weight/tension to keep shackles in place so they flip. This happens normally when the trailer is unloaded. If this is a new/recent occurrence then something-shackle straps, equalizer holes, etc- has worn out and needs to replaced. If it's a shackle issue, you will need to measure from...
    view full answer...
  • Correct Positioning of Shackle Strap
    There is no set angle, but you want to leave enough room for the suspension to articulate. By looking at the photo, you will indeed need to move the rear hanger back a bit. The shackle strap be much closer to vertical, as shown in the diagram provided.
    view full answer...
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  • How Many Shackle Straps For Single Axle Trailer
    The Shackle Strap part # TRSL350 comes as a single strap. There should be 2 shackle straps per spring on a single axle trailer. You would need to order 4 of the part # TRSL350 for a single axle.
    view full answer...
    Image 1 for
  • Selecting Replacement Shackle Straps for 30-Foot Toy Hauler Trailer
    Shackle straps are the most wear-prone part of a trailer suspension since they both carry weight and receive constant friction from the motion of the suspension. Shackle straps do not carry specific weight capacities, unlike the leaf springs they suspend. To select replacements all you need to do is match their length. Shackle straps are available in three lengths, 3-1/8-inch (single axle systems), 2-5/8-inch (tandem and triple axle trailers) and 2-1/4-inch, the most common length for...
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  • Can 3-1/2" Shackles Replace 3-1/4" Shackles On Boat Trailer?
    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 original3-1/4" shackles and the new 3-1/2" shackles like the # TRSL350 you purchased you won't have any issues. I included a video of the # TRSL350 for you to take a look at.
    view full answer...
  • Availability of 3-1/2 Inch Long Shackle Strap
    We do have the TruRyde Shackle Strap # TRSL350, which measures right at 3-1/2 inches from the center of one hole to the center of the other. Its overall length is 4-3/4 inches and it is 1-1/4 inches wide. The bolt hole diameter is 9/16 inches. If you instead are looking for a shackle strap with an overall length closer to 3-1/2 inches, we have the TruRyde Shackle Strap # TRSL256. This measures 3-7/8 inches long and 1-1/4 inches wide. From the center of one hole to the center of the other,...
    view full answer...
  • Can Trailer With Existing 3-1/2" Shackle Straps Use 2-5/16" Shackle Straps From Equalizer Kit
    Switching the shackle straps on your 2015 Big Tex 60CH would not be a good idea, especially since you would be using a significantly shorter size. In general, you want to keep the same length since swapping them out will change the suspension geometry and cause problems. Sometimes you need to use a longer shackle if you get a tall equalizer but I'm sure that doesn't apply here. Assuming you truly have 3-1/2" shackle straps you aren't going to find a kit with those since they aren't a...
    view full answer...
  • Replacement Shackle Links For Boat Trailer
    The longest shackle straps we offer are part # TRSL350, and those measure 3-1/2 inches hole center to hole center. For more clearance you may want to install longer hangers. Although these may be a lot more work because you would have to remove the old hangers and then weld new hangers in place, they may give you the length you need to move the wheels away from the fenders. I have attached a link to out product page of the hangers we offer. You can use the menu at the left of the page...
    view full answer...
  • Shackle Straps Are Flipping on Tandem Axle Trailer
    Shackle links can flip when the trailer is unloaded since there isn't enough weight to keep them in proper position, and while a new, shorter equalizer may help, the easiest thing to check is the shackle links. Shackles that are too short can cause them to flip, so the best thing to check first is the length of your shackles, and replace them with longer ones if possible. You'll want to measure from center to center of the bolt holes to check their length, and replace them with one of...
    view full answer...
  • Troubleshooting Shackle Straps That Keep Flipping Down
    Hey Joe, If your shackle straps are too short and there isn't enough weight on the trailer the shackle straps can flip down as you run over bumps in the road. Increasing to a 3-1/8" long # TRSL313 or 3-1/2" long # TRSL350 shackle strap size could help bring the leaf springs up towards the center a bit more and prevent the axles from dropping. Your hanger spacing is fine so I'm curious to see how wide the shackle straps sit outwards when the axles are sitting properly. If you'd like to...
    view full answer...
  • What to do if Trailer Shackles are Flipping
    Generally the issue when shackles flip when hauling empty is that they are too short. So I recommend measuring them from center hole to center hole and assuming they are less than 3 inches, replacing them with longer ones, the 3-1/8" Shackle Strap # TRSL313 or 3-1/2" Shackle Strap # TRSL350.
    view full answer...
  • Are Shackles Supposed To Move Freely and Can They Flip The Wrong Way
    The shackles on suspension systems like part # TRSL350 are designed to be fairly loose because the equalizer on your trailer suspension needs to be able to move without binding. The best thing to do when tightening down shackle bolts is to use lock nuts, tighten them until they are snug, then back them off 1/4 turn. It is possible that the shackle can flip into the wrong direction however most of the time putting weight on the trailer is enough to correct it or you can jack up the trailer...
    view full answer...
  • Recommended Lift Kit For a 5' X 8' Single Axle Trailer To Install Larger Wheels and Tires
    I recommend the Correct Track Trailer Alignment and Lift Kit # LC87120 that will allow you to raise your suspension 2-1/4". If you were to extend the shackle strap it would be a very long strap and would put the leaf spring at an angle that would affect how the spring compress since it will be angled forward and not relatively flat to the ground.
    view full answer...
  • Fender Compatibility with Dual Axle Trailer Suspension
    If I understand what you are asking, it sounds like you replaced your trailer fenders with a smaller fender giving you less clearance from your trailer tires. Trailer suspension normally needs 3-4 inches of deflection (vertical movement) to operate as intended under load, so I recommend checking your measurements to make sure you don't have any issues with tires coming in contact with the fenders. If you can enough clearance under load then it is safe and legal. We don't carry any dual...
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  • Can You go From 20-1/2 Inch to 23-1/8 Inch 3,500 lb Leaf Spring if Shackle is Horizontal
    Your trailer with a 3,500 lb axle should definitely have 3,500 lb leaf springs, and they also shouldn't be almost horizontal, they should be closer to vertical (but still angled a bit). So if they are 20-1/2 inches now you can go to the 23-1/8 inch 3-Leaf Double-Eye Spring for 3,500-lb Trailer Axles # e59SR.
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  • Tandem Axle Hanger Kit With 7-Inch Equalizers and 4-1/2-Inch Hangers
    We offer a Tandem-Axle Trailer Hanger Kit for Double-Eye Springs from Redline, part # APT8, that includes 7-3/4-Inch long curved equalizers and both 4-1/2-inch and 2-1/2-inch tall hangers. The shackle straps in this kit are 2-5/8-inch long measured from hole center to hole center, but we do offer longer shackle straps as separate components. For example, part # TRSL350 is a 3-1/2-inch strap (measured eye to eye) and 4-3/4-inches overall. I have included a link to our main page for trailer...
    view full answer...
  • Recommended Shackle Straps and Bolts for 7K AL-KO Axles on Moritz Dump Trailer With 7-3/4 Equalizer
    For your shackle straps, I recommend the 3-1/2 inch # TRSL350 and for your bolts the Wet Equalizer Bolt with Locknut and Grease Zerk for Double-Eye Springs - 3-5/16" Long # 126B2. These bolts have the zerk fitting to allow you to add grease for better movement and less noise. If you prefer basic bolts, then I recommend # 166081.
    view full answer...
  • Which Equalizer Upgrade Kit Fits a Tandem Axle Trailer with 35 inch Axle Spacing
    Since your tandem axle trailer has an axle spacing of 35 inches the correct equalizer upgrade kit you'd want is the part # K71-449-00. The shackles of this kit are a little shorter at 2-1/4 inches but this kit would still fit and work well. The shackle angle would change slightly but it would not affect anything otherwise.
    view full answer...
  • Should 2-1/4 Shackle Straps with New Suspension Kit be Used Instead of 3-1/2 Current Straps
    The 1/4" shorter equalizer in the Dexter Heavy-Duty Suspension Kit # K71-359-00 will be just fine but you are correct that you don't want to use shorter shackle straps as well. You can either reuse your old ones if they are in good shape or use the 3-1/2" Shackle Strap # TRSL350 instead. It would be a good idea to just use new straps since you are changing out suspension parts anyways.
    view full answer...
  • Measurements of CE Smith U-Bolt CE15260A
    I went out to the warehouse and pulled u-bolt # CE15260A to measure it. The inside width is 3-1/2 inches. The center to center width is 3-7/8 inches. And the outer width is 4-1/4 inches. The inside height is 6 inches. The overall height is 6-3/8 inches. The shackle link # TRSL350 would not work because the hole spacing is too short at 3-1/2 inches. You would have to either bore out the holes some or bend the u-bolt to fit. We do not have a specific plate that would work or that has the...
    view full answer...
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