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Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 5-7/16" Center
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Redline

Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 5-7/16" Center

Part Number: APT3HD
In Stock
$179.39
Trailer Suspension Parts
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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Leaf-spring mounting kit includes 2-1/2" tall front hangers, 5-7/16" tall center hangers, 2-1/2" tall rear hangers and necessary hardware. Equalizers are 7-3/4" long. Components for mounting axle to springs sold separately. Great Prices for the best trailer suspension parts from Redline. Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 5-7/16" Center part number APT3HD can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (130)
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Redline Trailer Suspension Parts - APT3HD

Highlights

  • For Tandem 2,000–7,000 lb Axles: Handles the weight range common to most dual-axle trailers.
  • 2-1/2" Front/Rear & 5-7/16" Center Hangers: Sets correct ride height and equalizer travel.
  • 7-3/4" Long Equalizers: Helps balance load between axles for smoother towing.
  • Weld-On Hanger Kit: Provides a solid, permanent mount for double-eye leaf springs.
  • 3/4" Center & 9/16" End Holes: Matches standard wet bolts for reliable movement.
  • Includes Bolts, Shackles & Nuts: Supplies key hardware for complete spring mounting.
Made in USA

Features to know about

Steady Suspension You Can Count On: Weld-On Hangers Built for Tandem Axles

A reliable suspension starts with hangers that stay put. This kit uses weld-on hangers—(4) 2-1/2" tall front and rear and (2) 5-7/16" tall center hangers—to mount your double-eye leaf springs securely to the frame. The center hangers include 3/4" bolt holes for solid connection to the equalizers. It’s built to handle tandem setups running 2,000-lb to 7,000-lb axles, giving your trailer a strong, straightforward foundation for smooth tracking on the road.

Smooth Spring Movement: 7-3/4" Equalizers Balance the Load

Uneven load transfer causes bounce and sway. The included 7-3/4" long curved equalizers even out movement between the axles so both sets of springs share the work. With a 3/4" diameter center hole and 9/16" diameter end holes, the equalizers line up precisely with the wet bolts and shackles in this kit to keep motion controlled and consistent.

Durable, Serviceable Hardware: Wet Bolts and Grease Zerks Keep Things Moving

Creaks and wear show up fast when parts run dry. This kit uses 3-1/2" long × 3/4" diameter wet equalizer bolts fitted with 1/8" MPT grease zerks so you can keep the suspension lubricated through regular maintenance. The design keeps wear surfaces protected and extends the life of the pivot points for quieter, smoother travel mile after mile.

Complete Connection from Springs to Frame: All the Right Pieces in One Kit

Everything needed to hang four leaf springs (sold separately) is here—(8) 2-5/8" long shackle straps, (12) 3" long × 9/16" diameter shackle bolts, (12) 9/16" diameter locknuts, (2) 3/4" diameter castle nuts, and (2) 2-1/4" cotter pins. It’s a matched set that takes the guesswork out of building or restoring a tandem suspension so you can get a precise fit and dependable ride.

Specs

Hanger Dimensions

  • Front hangers height: 2-1/2"
  • Center hangers height: 5-7/16"
  • Rear hangers height: 2-1/2"

Equalizer Specifications

  • Equalizer length: 7-3/4"
  • Center hole diameter: 3/4"
  • End hole diameter: 9/16"

Shackle and Hardware

  • Shackle strap length: 2-5/8"
  • Shackle bolt length: 3"
  • Shackle bolt diameter: 9/16"
  • Locknut diameter: 9/16"
  • Wet equalizer bolt length: 3-1/2"
  • Wet equalizer bolt diameter: 3/4"
  • Castle nut diameter: 3/4"
  • Cotter pin length: 2-1/4"
  • Grease zerk size: 1/8" MPT

Compatibility

  • Trailer type: Tandem axle
  • Axle capacity range: 2,000 lbs to 7,000 lbs

APT3HD Tandem Axle Hanger Kit - 1.75" Double Eye Springs - 2,000 lbs to 7,000 lbs





Ratings & Reviews

4.7

130 reviews
Review sort icon
Leaf-spring mounting kit includes 2-1/2" tall front hangers, 5-7/16" tall center hangers, 2-1/2" tall rear hangers and necessary hardware. Equalizers are 7-3/4" long. Components for mounting axle to springs sold separately.

by:

Product was just as advertised. Nice to just order a kit and not have to worry about forgetting something. My only complaint was the packaging as everything was just loose in a cardboard box. Surprisingly nothing fell out in transit considering all the nuts, zerks and cotter pins were rolling around and there was a hole in the side of the box.



by:

Product was as advertised. I did have to modify the center one as I was unaware there are high/low equalizers. I ended up drilling a new hole and it worked fine. 10/10.



by:

High quality hangers fast shipping awesome company to work with and very knowledgeable



by:

Kit purchased to repalce damaged components on an existing 70's era trailer. The complete hanger kit was cheaper than purchasing the individual parts I needed. The hangers were not used but the equalizers, shackels, and bolts were direct replacements to restore my trailer to tip top shape. I added some nylon spring eye bushings to complete the job!



by:

Well, organize Internet, quick delivery thank you



by:

Rebuilding a 1995 Escort tandem axle boat trailer for a 24` Trophy. If anyone is rebuilding one, you know aftermarket parts are impossible to find as they are bolt on hangers. Had to slot out one of the holes on each bracket (didn't use equalizer bracket) to make it work and coated with galvanized spray paint. Did the trick but haven't reassembled suspension yet as parts are being sourced from 5 different companies.



by:

I have ordered from Etrailer a few times now, The service is always great and fast shipping. They have the best prices around. Where I live I have 24 miles of rough dirt road so am always replacing parts on my trailers. Their products hold up to the test of my road. Always a perfect fit too!



by:

This hanger kit and leaf springs for my tandem boat trailer was PERFECT! I did one side at a time. Once we got the old crap off the trailer, reassembly was a snap. It took about three hours from start to finish. Most of the time was spend removing the frozen center bolt from the old equalizers. I'm very happy I opted for the two center bolts to be "wet bolts". Thanks again, I would definitely recommend etrailer to my friends. Regards, Bob



by:

Timeline for delivery was excellent and the order was exactly as I expected



by:

They worked out excellent



by:

Works great



by:

I spoke with Trevor, Thursday the 11th, I have 1set, 2 PCs, of shackle straps that are shorter than the other 6 shackle straps. I have been waiting for An email from Trevor, have not received it. Could I get the correct straps sent 2 PCs needed. Thanx



by:

Quick shipping good price thank you



by:



by:

fast service and smooth transaction . the parts were just what I needed.thank you



by:

The hanger kit was very robust just as described. Quality product



by:

Shopping was easy had no problems. Everything was delivered in time. Customer service was excellent. Will definitely be shopping with them again.



by:

I was able to find all the parts I needed. All the parts fit and were as described.This is were I will buy my trailer parts in the future.

Thank You



by:

The etrailer site was very informative. I didn't know exactly what I wanted because of the suspension I was upgrading. The site gave me the info to order the right items and they all worked very well.



by:

Couldn't figure out how I was going to fix an old trailer we've had for
years and someone told me about etrailer.com , got everything I
needed to put a complete new suspension under it , everything was a
perfect fit and worked out great . Would and do recommend them .



by:

I was rebuilding the suspension on one of my trailers and needed tbis hardware. It was shipped fast and with a little measuring and welding it was installed with ease.



by:

All items received as expected. In new condition. The etrailer website was easy to find what we needed and easy to click through.

etrailer packaging was great which contained the leaf springs. RedNeck Trailer packaging was good, but not as good as etrailer.



by:

Good value for money, robust parts to refurbish my trailer. Have yet to assemble these spring lift parts. Thanks.

Peter R. profile picture

Peter R.

8/8/2020

Very good product, working well.



by:

this is a nice heavy duty product. I plan on adding an axle to my trailer. The existing axle is too far forward and I forced to load heave in the front to prevent sway. when the trailer is empty or evenly loaded I have to be on my P's & Q's to minimize the sway. I can just move the axle back but the extra capacity will be nice.



by:

Perfect application to give my trailer a cpl more inches of lift. Prior to installing the longer hangers, the frame would rest on the axles of my trailer. Now with these longer replacement hangers, that no longer happens. Very satisfied customer.

Ron R. profile picture

Ron R.

4/12/2020

Absolutely what I needed!


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See what our Experts say about this Redline Trailer Suspension Parts

  • Why is Center Hanger Longer for Tandem Axle Trailer Hanger Kit
    The center hangers in the Tandem-Axle Trailer Hanger Kit # APT8 that you recently purchased are indeed longer. This is actually pretty common for tandem axle trailers. The reason for the extra length on the middle hanger is related to the shackle straps of the equalizer. You want this hanger to be a bit longer to compensate for how the shackle straps move the spring higher up. I have attached an image to better clarify this. It is possible for the shackle to flip like you described, but...
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  • Tandem Axle Hanger Spacing for Double Eye Springs 25-1/2 Inches
    For your double eye springs that are 25-1/2 inches, it is likely your hangers are 29-1/2 inches apart on center and your springs most likely were originally 25-1/4 inches as they will stretch slightly over time. For instance if you were to use 25-1/4 inch springs like # e34SR then you could use tandem axle trailer hanger kit # APT5 and use either spacing 29-1/2 inches on center for a good fit.
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  • Replacement Suspension Kit Recommendation for a 2021 Lamar Trailer with Tandem 7K Axles
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  • Does Trailer Suspension 7-3/4 Inch Equalizer EQ-E1 Have a Weight Capacity
    Equalizer # TREQE1 does not have a weight capacity itself. It isn't bearing much of the weight compared to other components in a trailer suspension set up. If you have a tandem axle trailer then you could potentially use kit # APT5, # APT3, # APT9, # APT8, # APT7, or # APT3HD. All of these kits have the 7-3/4 inch long equalizers. For a triple axle trailer you could use # APTT5 or # APTT3. All of the above kits also come with hangers. If you do not need hangers then you would need to...
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    It is possible to have a center spring hanger that will be longer than the front and rear hangers. For an example I would have the Tandem-Axle Trailer Hanger Kit for Double-Eye Springs, part # APT3HD. This kit has 2-1/2 inch tall front and rear hangers and a 5-7/16 inch tall center hanger. A longer center spring hanger is normally used in conjunction with an equalizer. The equalizers are designed to transfer the load from one axle to another when the trailer goes over a bump. I am including...
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  • Replacement Equalizer and Hanger Recommendation to Replace EQE1
    For a kit that comes with the same size equalizer as the # TREQE1 that you have that also includes bushings, hangers, and a hanger bolt you'd want the # APT3HD. This also comes with shackles and everything else needed so you'd be set with just the one part number.
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  • Minimum Clearance Between Tires on Tandem Axle Trailer
    It is possible that the 10K axles that were retro-fitted to your trailer also had larger diameter wheels/tires installed on them to take advantage of the new axles' higher weight capacity. The bare minimum tire spacing on a tandem axle trailer is 2-inches unloaded and 1-inch when loaded. It looks like your unloaded trailer has at best 1-inch spacing and this is not enough. You will need to either switch to smaller diameter wheels and/or tires (which may have a lower weight rating) or...
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  • Determining The Correct Replacement Leaf Springs For Tandem Axle Trailer W/ Square Axles
    I would be happy to help you find the correct replacement suspension components for your trailer, but you will need to take a few measurements first. Starting with the leaf springs, you will need to make sure that the tires on the side of the trailer you are working on is off the ground with the trailer supported by the frame as the leaf springs will stretch when the tires are on the ground and weight is applied. If your 26-1/2" measurement was with the tires off the ground the closest...
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    At the very least, you want to see at least 3 inches of clearance between the tire and the underside of the fender with the suspension at full load. With the goal of gaining height, best course is to go with taller spring hangers. Keep in mind that the amount by which you increase the height of the spring hangers won't necessarily be the amount the ride height increases, due to the fact that the suspension articulates. Replacing the front and rear hangers as well would be a great idea...
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  • Replacement Hanger Kit For a 10,000LB Tandem Axle Tilt Trailer With 2" and 5-1/2" Hanger Heights
    The Hanger Kit # APT3HD is going to be the closest we have to your current hangers. This kit does have the same 2-1/2" front and rear hangers as the Kit # APT8 you found but it has the taller 5-7/16" center hangers which is very close to your current 5-1/2" hangers. This slight difference in hanger size will result in a slightly higher trailer height likely only around 1/4". The old springs likely have more sag than that depending on the age of the trailer.
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  • Recommended Hanger Spacing for 24-7/8 Inch Long Leaf Spring with APT4 or APT3HD Hanger Kit
    Based on my research, when using the Universal Group Leaf Springs # SP-222275 that has a spring eye length of 24-7/8 inches with either the Redline Tandem Axle Hanger Kit # APT4 or # APT3HD, you will want a distance of 29-1/2 inches between the hangers on your trailer. Both hanger kits you referenced include everything needed to attach 4 leaf springs to your trailer frame. I have included a couple short video demonstrations on these kits along with an article on positioning a trailer axle...
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  • Does the Hanger Kit part # APT3HD Get Welded or Bolted to Trailer Frame
    Suspension hangers like what come with the Hanger Kit part # APT3HD that you referenced are designed to be welded to the trailer. You would not want to bolt this kit to the frame of your trailer.
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  • Availability of Leaf Spring Hanger/Equalizer Kit for Springs that are 2 inches Wide
    We have tandem axle slipper spring hanger/equalizer kits like with the part # APT6SE but if the leaf springs are double eye springs we don't have anything based on your width.
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Info for this part was:

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Employee Adam R
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Employee Cole B
Installed by:
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Employee Wilson B
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Employee Alexander C
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