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Single-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front, 1-1/4" Rear

Single-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front, 1-1/4" Rear

Item # APS4
Our Price: $41.68
You Save: 13%
Trailer Leaf Spring Suspension
Shipping Weight: 8 lbs
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Kit includes 3-1/4" tall front hangers, 1-1/4" tall rear hangers, 3-1/8" shackle straps and hardware for mounting springs to your 2,000-lb to 7,000-lb, single-axle trailer frame. Components for mounting axle to springs sold separately. Great Prices for the best trailer leaf spring suspension from etrailer. Single-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front, 1-1/4" Rear part number APS4 can be ordered online at or call 1-800-940-8924 for expert service.
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etrailer Trailer Leaf Spring Suspension - APS4

  • Hangers
  • Suspension Kits
  • Boat Trailer
  • Camper
  • Car Hauler
  • Snowmobile Trailer
  • Utility Trailer
  • Double Eye Springs
  • Single Axle
  • etrailer

Kit includes 3-1/4" tall front hangers, 1-1/4" tall rear hangers, 3-1/8" shackle straps and hardware for mounting springs to your 2,000-lb to 7,000-lb, single-axle trailer frame. Components for mounting axle to springs sold separately.


  • Attaches 2 leaf springs (sold separately) to your trailer frame
    • Use table below to determine hanger location based on type of leaf springs
  • Achieves 5" or 5-1/2" clearance between trailer frame and axle, depending on axle size
  • Includes:
    • (2) 3-1/4" Tall front hangers
    • (2) 1-1/4" Tall rear hangers
    • (4) 3-1/8" Long shackle straps
    • (6) 3" Long x 9/16" diameter shackle bolts
    • (6) 9/16" Diameter locknuts
  • Designed for use on trailers with single, 2,000-lb to 7,000-lb axles
  • Does not include components for mounting axle to springs

Hanger Locations for Single Axle

Leaf SpringsA - Distance Between HangersB - Distance Between Center of Axle and Trailer FrameAxle Diameter
SP-169275 (1020)20"5-1/2"1-3/4"
(typical 2,000-lb trailer axle)
SP-219275 (PR722)
SP-220275 (PR3)
SP-218275 (PR4)
SP-212275 (PR4B)
SP-111275 (PR5)
SP-198275 (PR6)
(typical 3,500-lb trailer axle)

Note: The above table provides an indication of where the included hangers can be mounted on your trailer. The distance between the hangers may vary depending on your specific application. Be sure to verify proper positioning before welding.

TSW-S7 Single Axle Hanger Kit - 1.75" Double Eye Springs - 2,000 lbs to 7,000 lbs

Replaces APS4

Customer Satisfaction Score:

Customer Reviews

Single-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front, 1-1/4" Rear - APS4

Average Customer Rating:  4.8 out of 5 stars   (181 Customer Reviews)

Kit includes 3-1/4" tall front hangers, 1-1/4" tall rear hangers, 3-1/8" shackle straps and hardware for mounting springs to your 2,000-lb to 7,000-lb, single-axle trailer frame. Components for mounting axle to springs sold separately.


Good kit with the necessary parts to replace leaf spring suspension. I welded the hangers rather than bolting them. The parts are not coated for the price point so you will need to paint them or they will rust immediately.


All businesses should be like etrailer! The gal was so kind and knowledgeable to help my husband get the right leaf spring replacements. We ordered a tire last spring and the same, excellent service and prompt delivery. Thanks so much


A good source for trailer parts. For finding parts,you need to know the specs of the trailer, not necessarily the manufacturer. Thanks etrailer!


Received my parts today and after examining everything all looks good.
The quality of parts looks excellent and can't wait to start installing them.
Shipping was fast and arrived as they said.
Great company to buy with.
Will was very helpful and very knowledgeable about parts.
If you call would definitely ask for Will.


Springs & hanger kit worked well.


I inherited an aluminum trailer that ended up needing a complete overhaul and etrailer was the best resource I could have found. After researching extensively to find out what I needed and watching their videos on how to do it I ended up ordering an EZ-lube axle, galvanized hubs, springs and a hanger kit (in other words everything from the frame down).
Everything shipped quickly and arrived in great shape. All the parts worked perfectly and I couldn't be happier!


Heavy duty hangers and bolts!


Nice product, did the job.

George B.


Very good product, and Im very satisfied thank you


Product was very good quality. Website was very thorough which made it much more comfortable ordering the proper parts. Fast delivery with updates throughout the process. Good quality service.


I had to email customer service as I bracket was folded incorrectly so that the bolt holes did not line up. Upon recieveing my email, a replacement was on the way! EXCELLENT customer service. Thank you etrailer.


Worked great on my 5x10 utility trailer


Product arrived just as described and very quickly. This kit was a great way to drop the springs on our trailer enough for the axle to be put on correctly.


The axle hanger kit arrived today. I have done a dry setup; everything fits as expected.

Thanks for your excellent product and prompt delivery.



I order parts from e-trailer fairly often it's always very fast shipping they always have what I'm looking for probably the best website to buy trailer parts online will continue to shop with them


The fit and finish were very good. Unfortunately, for me I had to order additional hanger brackets for the springs that were suggested for me as the kit only came with two compatible brackets. It has delayed my project for a few days until I get the new brackets.


my order arrived well packaged.
the parts
are every bit as good as OEM and went together nicely.


very good product


The hangers look good and I believe they will do a great job. I need to move my axle back on my trailer so it will be able to haul some weight. It is a dump style body and can't handle weight, only on the front of the trailer. So I am going to move the axle back about 6 to 8 inches. The tracking info on the kit was great... ALL gratitude goes to your company...



It works great. Thanks for making a wonderful product. I give you 5 stars.


Parts were exactly as described and worked well with my existing trailer brackets.


Price was good and got everything quick. Thanks Will definitely use them again!


I bought springs, mounts and Tailight kit to fix up a rusty utility trailer. I cut, weld scraped and painted for the better part of a month in spare time. The springs and mounting instructions on e trailer are excellent. Only issue/shortcoming are the tail lights. Wire just pushes in and spring loaded strip holds them. I soldered and sealed the connection with silicone. So far that salt covered roads haven't hurt it in winter. The folks at etrailer are very helpful and prices are a good value.


Kit is excellent. I would recommend this kit and to my friends


Great people, fast service, arrived complete with exact parts i needed.
Great followup emails



All the parts have held up fine with no signs of wear. I do occasionally gross out the trailer weight wise, your replacement parts have held up better than OEM parts.


Haven't installed it yet, but the components appear to be good quality. A little surprised that there are no actual spring bushings?? Maybe that's normal for trailer springs? Looks like a thin wrap of Teflon? or something. Anyway fast shipping and good packaging.

Etrailer Expert

Heather A.


The hanger kit does not include bushings because the trailer spring normally comes with bushings. If you are concerned about where the shackle strap bolts to the shorter hanger, I recommend it is well lubricated with grease such as L11380.


Thank you etrailer!

The shipment
arrived sooner than expected, the hanger kit was also included in the shipment with leaf springs I bought which arrived in a heavy duty box with very good packaging. As for the hanger kit it is heavy duty thicker gauge compared to the one currently on my utility trailer and will also raise my box. With beefing up my suspension I'll be able to carry a heavier load with my current axle.

Show More Reviews

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

  • Shackle Strap Length For Single-Axle Trailer Hanger Kit APS4
    From center hole to center hole, the shackle straps measure 3-1/8 inches on the hanger kit you asked about: - Single-Axle Trailer Hanger Kit for Double-Eye Springs # APS4 The kit also uses 3-1/4 inch tall front hangers, 1-1/4 tall rear hangers, and is designed for single axles with weight ratings between 2,000 lbs and 7,000 lbs.
    view full answer...
  • Could the Single-Axle Trailer Hanger Kit # APS4 Be Used for Mobile Home Leaf Springs
    If the springs you have are 1-3/4 inches wide the hanger kit part # APS4 that you referenced will technically fit and work with what you have. Since you are using axles we aren't familiar with I can't give you hanger spacing dimensions.
    view full answer...
  • How to Mount Redline Single-Axle Trailer Hanger Kit Part # APS4 To Trailer Frame
    I contacted our representative at Redline and he informed me that the Single-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4 Front, 1-1/2 Rear, part # APS4, must be welded to the trailer frame. He informed me that there should be a hole to make a Button Weld. I would recommend having a trailer professional install part # APS4.
    view full answer...
  • Thickness of Hangers in the Single-Axle Trailer Hanger Kit for Double-Eye Springs
    The Single-Axle Trailer Hanger Kit for Double-Eye Springs part # APS4 uses 3/16" thick hangers.
    view full answer...
  • What Torque Should My Suspension Components Be Tightened To?
    If you're referring to the bolts that attach the shackles in your suspension system to your # APS4 hangers, you won't need to torque them to a specific rating since over tightening those bolts would squeeze the shackles against the leaf springs and potentially cause binding issues. When it comes to mounting the hangers, it is strongly recommended that you weld your leaf spring hangers to your trailer frame. Mounting the hangers with a bolt only will not provide a secure connection between...
    view full answer...
  • Will Spline Length of Bolts from Single Axle Hanger Kit APS4 Prevent Leaf Spring Movement
    The spline length of the bolt that come with the Single-Axle Trailer Hanger Kit for Double-Eye Springs # APS4 aren't long enough that they would prevent the movement of a leaf spring with it. Basically holds the bolt to the shackle or hanger but does not go through enough to the spring to prevent it from moving.
    view full answer...
  • Hanger Placement with 3,500 lb Axle with Hanger Kit part # APS4 On Trailer with Axles Under Springs
    Your axles being under the leaf springs will not change the hanger location recommendations listed for the Single Axle Hanger Kit part # APS4. You would want to have the hangers 25-3/4 apart measured on bolt center. However, since your axles are below the springs you would not need to have 5 inches between the center of the axle and the trailer frame.
    view full answer...
  • How Far Apart Should Hangers be Mounted for 27 Inch Leaf Springs
    If your Double-Eye Leaf Springs are 27 inches long, you will just want to mount the hangers in the Redline Single-Axle Trailer Hanger Kit # APS4 mentioned in your question about 26-1/2 inches apart. As a general rule, you want the distance between hangers on a leaf spring suspension system to be around a 1/2 inch shorter than the distance of your leaf springs, which will allow for some movement with the shackle strap.
    view full answer...
  • Recommended Front Mount Hitch for a 2009 Ford Explorer
    Yes, we do! It is the Curt Front Mounted Trailer Hitch item # 31545 and it is custom fit for your 2009 Explorer. This hitch is made in the USA and bolts to your Explorer with included hardware. It has a 2" receiver with a 9,000 lbs line pull, a 500 lbs vertical load limit, and a gross trailer weight of 5,000 lbs.
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  • Where to Place Axle on a Custom Built Pontoon Boat Trailer
    When it comes to placing an axle on a trailer there is no set place for it to go, however the help article I have attached can really help you out in determining where the best place is on your trailer. A good starting point is having 60% of the trailer in front of the axle and 40% behind (include the tongue with this starting point) but because most of the weight of your boat will be at the rear due to the motor, you will most likely want to move it further back on the trailer in order...
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  • Recommended Shackle Straps or Hanger Kit for Single Axle Trailer
    We have some kits like the Single-Axle Trailer Hanger Kit for Double-Eye Springs - 1-1/2" Front, 7/8" Rear # APS1 and the Single-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front, 1-1/4" Rear # APS4. You are correct that that bolting to your hangers on both ends is not correct, however the size of the shackle strap needed is determined based on your hanger length as you can see in these kits. So, the Shackle Strap - 3-1/8" Long # TRSL313 may or may not be a good fit based...
    view full answer...
    Image 1 for
  • Do the Shackle Straps Go Inside or Outside the Leaf Spring Hanger
    The shackle straps need to be placed on the outside of the rear leaf spring hangers which you can see in the attached photo. Furthermore, the distance between the two mounting plates (inside to inside) on your leaf spring hangers should be 1-7/8", not 2" which is most likely why there is too much of a gap between the shackle straps and leaf spring. Therefore, the leaf spring hangers will need to be replaced. For this, we generally kit the single axle trailer suspension hangers and shackle...
    view full answer...
    Image 1 for
  • Recommended Double Eye Leaf Springs and Hanger Kit for 3,500 Pound Axle Trailer
    For double eye leaf springs, I recommend going with the 4-Leaf Double-Eye Spring # SP210275. This spring is 25-1/8 inches long x 1-3/4 inches wide and designed for 3,500 pound axles. These springs are a common length for 3,500 pound trailers. One spring is included with the part number, so you will want to order 2 of the same spring in order to replace both sides. A suspension kit will provide you with new hangers, shackle bolts, shackle straps, and locknuts needed for your new leaf springs....
    view full answer...
  • Leaf Springs and Hanger Kit for Single Axle Trailer with 2-3/8 OD Axle
    The correct hanger kit to fit the # e66SR Leaf Springs that will give you the appropriate clearance is the Single-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front, 1-1/4" Rear # APS4 . This will provide 3-11/16" clearance taking into account the axle diameter and spring pad you mentioned.
    view full answer...
  • Can a Coleman Fleetwood Pop Up be Converted From Slipper Spring to Double Eye
    If you wanted to convert your slipper spring suspension to double-eye suspension you certainly could. It would be just a matter of changing springs and hangers. You would need to go with a leaf spring that is rated for the weight of your trailer when it is loaded an ready to go. I attached a page that has all of the double eye springs we offer. At the top is a chart that has all of the springs and their capacities. Select the capacity you need and then on the product page the correct...
    view full answer...
  • Tall Single Axle Hanger Kit and Spacing Required Between Hangers
    Of the hanger kits we offer the # APS4 is going to be the tallest that we offer. The hanger spacing you will need to use for the leaf springs like # SP-210275 with the # ASP4 hanger kit is 25-3/4 inches.
    view full answer...
  • Installing Leaf Springs on Single Axle Trailer
    For a single axle trailer, you want the shackle strap to be able to move so that you have the spring deflection needed for your suspension. Angled like the photo or even almost vertical is fine you just don't want the shackle strap to bind and have issue as you go over bumps. If it is completely vertical or angled back toward the axle, then your leaf spring is not long enough and your suspension components will not move as intended giving you a rough ride at best and at worst failure...
    view full answer...
    Image 1 for
  • Can I Use a 2" Hanger for a 1-3/4" Wide Leaf Spring
    You want to make sure the hangers on your trailer have the same width as your leaf spring so if your leaf spring is 1-3/4" wide then you don't want to use a 2" or 2-1/2" wide hanger. It's true that you want the hanger bolts installed somewhat loosely so you leaf spring isn't binding, but you definitely don't want that much side to side play for your leaf springs inside your hangers. You either need to use wider leaf springs or you need to use smaller hangers like what you see with the...
    view full answer...
    Image 1 for Image 2 for
  • Does Trailer Tongue Length Have an Affect on Axle Placement
    The formula used for determining trailer axle placement (attached below) is just a general guideline. If you're building a trailer with a longer/shorter tongue than a standard trailer would have you may need to adjust these measurements. That said, we aren't custom trailer builders so we really can't provide specifics and the final location will be up to the installer. If you need the hardware to attach your axle to the frame, I recommend the Single-Axle Trailer Hanger Kit for Double-Eye...
    view full answer...
    Image 1 for
  • Can 14K Trailer Switch From Slipper Springs to Double-Eye Springs
    Yes, you can change your 14k trailer's slipper springs to double eye springs; you'll need new springs, of course, but also new hangers. So you'll have to have your old hangers cut off and the new ones welded on. You'll need to take some measurements to determine the correct replacement hangers, which should really be the same length as your current hangers. For example, I assume you have a tandem axle trailer and all the hangers are 3-1/4" tall you can use the Tandem-Axle Trailer Hanger...
    view full answer...
  • Correct Leaf Spring Hanger Position for Single Axle Trailer
    In order to mount a single axle on a trailer we recommend using a kit like the Single-Axle Trailer Hanger Kit for Double-Eye Springs part # APS4 which comes with hangers, shackles, and shoulder bolts. These can then be paired with a set of leaf springs like the 3-Leaf Double-Eye Spring part # SP-220275 which are 25-1/4" long. The spring hangers should then be positioned around 24-7/8" apart while using these springs. That said, we can't provide a full list of hanger spacing for every leaf...
    view full answer...
    Image 1 for
  • Rear Hangers in Trailer Suspension Kit # APS4 Do Not have Bushings
    The trailer suspension hanger kit # APS4 does include hangers that do not have bushings like you said. Adding bushing definitely would not hurt if they will fit. The bolts are 9/16 inch which is what the holes in the hangers accept. There likely isn't space for a bushing. The other issue is that there are no bushing we carry that have a 9/16 inch outer diameter (which would then require a smaller bolt). You will want to make sure the hangers without the bushings are well lubricated using...
    view full answer...
  • Hanger Spacing Dimension for the Leaf Spring SP-210275 on a Trailer
    The hanger spacing you will need to use for the # SP-210275 with the # APS4 hanger kit is 25-3/4 inches. One end of the leaf spring will overshoot the hanger and the shackle makes up the difference. This allows both ends of the spring to be at the same or close height and allow the suspension to move like it needs to.
    view full answer...
  • Best Options to Lift a Single Axle Trailer
    There are a few different ways to lift a trailer, installing taller leaf springs hangers is one of them. The Single-Axle Trailer Hanger Kit for Double-Eye Springs part # APS4 is a great option and may or may lift the trailer the amount you're looking for. It all comes down to the height of the leaf spring hangers you'll be replacing. That said, this is not always a direct 1:1 ratio so a better option would be the Lippert Components Standard Axle Lift Kit part # LC425750 which provides a...
    view full answer...

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Info for this part was:

Employee Lindsey S
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Employee Wilson B
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Employee Alexander C
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