bing tracking image
  1. Trailer Leaf Spring Suspension
  2. etrailer
  3. Standard Equalizer
  4. Equalizers
  5. Double Eye Springs
  6. 5-3/4 Inch Long
Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double Eye Springs - 2-1/4" Links

Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double Eye Springs - 2-1/4" Links

Item # AP233
lowest price pledge
Our Price: $61.37
You Save: 9%
Trailer Leaf Spring Suspension
Orders above $99 qualify for Free Shipping
Shipping Weight: 10 lbs
In Stock
etrailer Trailer Leaf Spring Suspension - AP233
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Need help with installation?
Locate installers near me
Suspension kit includes equalizers and hardware for attaching 4 leaf springs to the hangers on your trailer's frame. Works with 33" axle spacing. Lowest Prices for the best trailer leaf spring suspension from etrailer. Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double Eye Springs - 2-1/4" Links part number AP233 can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (331)
  • Q & A (0)
  • Photos
  • Why etrailer?

etrailer Trailer Leaf Spring Suspension - AP233

  • Standard Equalizer
  • Equalizers
  • Double Eye Springs
  • 5-3/4 Inch Long
  • Tandem Axle
  • etrailer

Suspension kit includes equalizers and hardware for attaching 4 leaf springs to the hangers on your trailer's frame. Works with 33" axle spacing.


  • Suspension kit lets you attach 4 leaf springs (sold separately) to your trailer frame
    • Works with 1-3/4" wide double-eye springs
    • Hangers sold separately
  • Equalizers transfer load and impacts from one axle to another by permitting movement between the axles
    • Springs attach to ends of equalizers with included hardware
  • Bolts secure equalizers and springs to the hangers on your trailer
  • Shackle link assemblies with bolts secure springs to equalizers
  • Kit includes:
    • 2 Equalizers
    • 8 Shackle straps
    • 14 Bolts with locknuts


  • Application: tandem-axle trailer with 1-3/4" wide double-eye springs
  • Axle spacing: 33"
  • Equalizer dimensions: 2" tall
    • 5-3/4" Long from center hole to center hole
  • Shackle strap length: 2-1/4" from center hole to center hole
  • Bolt dimensions: 3" long x 9/16" diameter

Hanger Locations for Tandem Axle

Leaf SpringsA - Distance Between Front and Center HangersB - Distance Between Center and Rear HangersC - Distance Between U-BoltsD - Distance Between Center of Axle and Trailer FrameAxle Diameter
SP-169275 (1020)25"25"29"5"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)

TSW-19 Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double Eye Springs - 2-1/4" Long Shackle Straps

Replaces AP233

Customer Reviews

Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double Eye Springs - 2-1/4" Links - AP233

Average Customer Rating:  4.8 out of 5 stars   (331 Customer Reviews)

Suspension kit includes equalizers and hardware for attaching 4 leaf springs to the hangers on your trailer's frame. Works with 33" axle spacing.


Nice kit, everything fit like it should, easy to install, with the wear this trailer had, obviously had to do a little tapping here and there.


Full disclosure: we boat in brackish water in Florida, but I always hose the trailer down afterward.
Springs work as they should and installation was straightforward. However, I’m not sure how long they’ll last. After only 5 or 6 launches/ retrievals last year, this is what they look like now. The springs and equalizer must’ve been spray-painted at the factory, not powder-coated. I believe made in China. I even soaked the bolts and links in motor oil before installing to stave-off corrosion. I just hope we don’t have a failure on the road any time soon because of this accelerated corrosion!


service was excellent as usual delivered earlier than promised. I was however disappointed in what I received. The ubolts were not as promised. they only had 2 inches of thread I needed about 21/2. This was a surprise as I was told they would have 4 inches.This meant a trip to an automotive store to get what I needed. now I have 8 ubolts that are not much good to me. How unlike etrailer.

I checked and we do not have nine sixteenth suspension bolts that will have a longer thread length.
-- Etrailer Expert Jenny N - 05/04/2022


Trailer has 13000 miles, much of it on rough highways. I realized there was looseness in the suspension and could see the shackle holes were showing some elongation. This kit restored it to good running condition. The marks on the parts indicate they are of the same manufacture as the original equipment from LCI. I am very satisfied with the results. I also changed the original equipment brake assemblies at the same time installing Axletek self adjusting brake assemblies.


I received this product and had a manufacturing issue. After a few emails back and forth I was fully refunded. Unfortunately this stuff happens and I wanted to thank etrailer for taking care of the issue. Thank you and I look forward to continued business.


After all of the bad weather I was able to finish installing my new suspension system on my 1992 Lance Fifth Wheel. The task was much easier than I had anticipated. The instructional video you provide access to were a big help. Other than having to grind off a nut or two I had no difficulties (See attached photos). The 'list' that had developed on the fifth wheel is now resolved, and towing has already proven to be better.


I ended up buying something different. Very poor quality. I did email etrailer to see if they would do something and waited a couple of weeks for a response and I’m still waiting. After the second nut and bolt combo stripped I pulled everything from this kit off and put it where it belonged. In the garbage. Sorry for the bad review but I tried.

I sent a note to customer service about this and they will reach out.
-- Etrailer Expert Sierra K - 06/20/2022


This kit worked out perfect for my 16' 89 layton travel trailer. I have the elusive 2800 lb axles (which axle tube diameter matches 3500lb axles) which I have been told by etrailer tech support were made specially for the RV industry. I also replaced the leaf springs but had to get them elsewhere because etrailer does not stock them. The info on the 2800 lb axles I got from etrailer was invaluable in being able to locate the leaf springs I needed.


The suspension kit was just what I was expecting they are high Quality for the price I payed I would definitely get parts from etrailer again.


Used this for a 2009 MFI trailer, so far so good after 1 year of use in salt water. great product.


Gave these and another set to my mechanic for install. He liked the other set and this Suspension Kit was put in the corner of the garage. The issue was the threads. They weren’t as smooth as the other set. Guess I should return this set


Very high quality replacement springs and bolts


I have been running the axle and parts on my aluminum trailer for a year now. They have performed flawlessly. As I travel many miles a year pulling my bass boat all over, never worry about the trailer, only the bearings!!!!


I need to order another shackle buddies trailer was in bad shape


These were the exact replacement but better quality than factory.


Just what I ordered. Right on time

Still very satisfied with the product.
Richard - 04/14/2022


Seems like a good product haven't tested it yet only thing that could be better is the way it's shipped bolts were all loose in box which could cause the threads to get mangled


Everything was in the box - all parts fit as they should


All arrived on the date committed and was complete.


Excellent replacement parts for worn out trailer suspension. Fitment was great. And shipped fast.


Converted my 30 ft home built trailer to carry my 25 ft sailboat with 3 1/2 ft keel. I needed new springs to carry her weight Your parts arrived on time. So far all is going well on the upgrade. Thanks for the positive information and can do attitude of your company.


Excellent product. Everything fit together as it should. Put simply... I was very impressed.

Well, its been a year and I am still very impressed with the suspension parts I got from eTrailer. I have ran my car trailer from Michigan down to southern Ohio, Indiana, and Illinois. Had no issues what so ever. The trailer handled beautifully.
Sgtbass64 - 12/09/2016


I bought these to replace the hangers on an old boat trailer, I tried to source these parts locally from several trailer mfg in the area and no one could get them and that's when I found them here at the kit was a perfect match to what I had and was an easy replacement. The quality was excellent as well.

It’s hanging in there
Justin - 03/14/2021


Fit just like it should. Thanks so much

All product parts fit to a T, after a year still going
Kathy - 02/15/2022


Well, my suspension replacement and over/under swap went great! You guys were very helpful in ensuring I got the right parts and didn't waste money on shipping and other parts I didn't need. It tows like a dream now. I hardly even notice it behind me and I really don't have to slow down to .05 MPH for every little dip in the road.

Show More Reviews

Ask the Experts about this etrailer Trailer Leaf Spring Suspension

  • Are Bushings Required with the Tandem-Axle Trailer Equalizer Kit # AP233
    The equalizers of the part # AP233 have bushings in them already. The leaf springs you would use these with would already have bushings as well most likely. Typically people do not need to buy bushings with this kit or with this kit plus leaf springs.
    view full answer...
  • Do the Equalizers of Kit # AP233 Have Bushings
    Yes, there is a bushing inside the equalizer kit part # AP233 that you referenced.
    view full answer...
  • Are Nuts that Come with Trailer Suspension Kit # AP233 Lock Nuts
    The threads of the nuts that come with the Suspension Kit for Tandem-Axle Trailers # AP233 that you referenced are considered lock nuts. They should thread pretty tightly once the nut gets significantly onto the bolt which prevents it from backing off.
    view full answer...
  • Where is Trailer Suspension Equalizer Length Measured
    The equalizers in trailer suspension hanger kit # AP233 are 5-3/4 inches long measured from the center of one spring eye to the center of the other spring eye. I have included a picture illustrating this for you.
    view full answer...
    Image 1 for
  • What Is Normal Deflection Of Leaf Springs On Trailer
    The typical spring deflection for leaf springs on a trailer is up to 1-1/2 inches when at capacity. The recommended clearance with leaf spring suspension on an unloaded trailer is between 2 - 2-1/2 inches. It sounds like you have a little more than that since you flipped your axle. Leaf springs only tend to deflect about 1-1/2 inches when carrying a load.
    view full answer...
  • Replacement Equalizers Needed for EZ Loader Boat Trailer
    When it comes to determining which equalizers are needed for your EZ Loader boat trailer, you will need to get some measurements. I have included a diagram with information as to what measurements are needed. I have also included a link to our equalizers and once you have the measurements you can use the filters on the page to narrow the search. It has already been narrowed down to those for the 1-3/4 inch spring. If you would still like to send me the picture and also your equalizer measurements,...
    view full answer...
    Image 1 for
  • Finding Correct Replacement Tandem Trailer Axle Equalizer Kit
    As long as the new equalizer has the same hole spacing as the existing equalizer, it'll work just fine. You'll also want to make sure the height of the equalizer is also the same. Put a ruler across the center of the two bottom bolt holes, and measure up to the center to the top bolt hole. If this distance is about two inches, then the # AP233 would be the correct replacement.
    view full answer...
    Image 1 for
  • Replacement Shackle Links for Suspension on 2003 Keystone Montana
    Trailer makers like Keystone do not maintain specs on smaller items like the suspension components such as shackle links used in their trailers. So to choose new ones you can match up the length and hole diameter to your original links. You can see all of our shackle links on the page provided for you. I also linked the main page for all trailer suspension items such as bushing and shackle bolts.
    view full answer...
  • Why Would Trailer Axle Move to Left When Brakes are Applied
    Part of your suspension setup is damaged. Before you drive your trailer again check out all of the suspension components on the trailer. Most likely there's something broken on the passenger side that allowing the axle to move. Let me know what you find that's broken with pictures if you can and we can see what would work best to fix it.
    view full answer...
  • How Tight Should Trailer Suspension Hanger/Equalizer Bolts Get Torqued
    Suspension bolts are not designed to be torqued down tightly as this prevents the suspension from being able to move like it needs to be able to do. So the included solution with the kit part # AP233 is the lock nuts of the kit. The nuts have nylock in them which means that they will not back off regardless of how "loose" they are installed on the bolts. Basically you tighten the nuts down so that the excess side to side movement is removed from them but the shackles can still freely move...
    view full answer...
  • Bushing Material in Equalizers of Suspension Kit for Tandem-Axle Trailers # AP233
    The bushings that are in the equalizers of the kit part # AP233 are Nylon.
    view full answer...
  • How Tight Should Shackle Link Nuts Be On Trailer Suspension
    In regards to trailer suspension kits like the Suspension Kit for Tandem-Axle Trailers part # AP233, the shackle bolt heads are indeed seating into the hangers via the knurling on the bolt. If you hold a wrench on the bolt head and tighten the nut, this will seat the knurling. The bolt does not pivot on the outer shackle links but rather the spring/equalizer pivots on the bolt. There is no torque spec for this bolt/nut, you'll stop tightening when the spring/equalizer does not have any...
    view full answer...
  • Determining What Hanger Spacing For Tandem Axle Trailer Using 28-3/4" Long Leaf Springs
    I would be happy to help, but the only way to find the exact location for mounting the hangers to your boat trailer is going to be by tacking the hangers in place and moving them around until you get the suspension correct. When done correctly the shackle straps on the equalizer should point like a W like in the included picture. Your 730mm spring translates to 28-3/4" which is not a very common length so there is not exact hanger spacing anywhere for a spring that length. On all of the...
    view full answer...
  • Replacement Equalizer Kit For Coachmen Camper Trailer
    The Tandem-Axle Trailer Equalizer Kit, part # AP233 includes (2) part # TREQ104 equalizers, which are replacements for the 13-104-2 equalizers. The kit also includes the shackle straps, bolts, and locknuts.
    view full answer...
  • Replacement Trailer Shackle Recommendation to Replace Shackle that is 2-1/2 inch on Centers
    The closest shackle we offer to the 2-1/2 inch size you need is the part # 115052 which is 2-5/8 inches from hole center to center. This would only be 1/8 of an inch larger than what you need so it would work well.
    view full answer...
  • Can 5-3/4 Inch Tandem Axle Equalizers be Replaced with 5-5/8 Inch Equalizers
    The Tandem-Axle Equalizer Kit, # AP233, will work as long as all other measurements are the same. Check that your shackle straps are 2-1/4 inches from center hole to center hole. The 5-3/4 inch long equalizer, # TREQ104, we carry is a direct replacement for the 5-5/8 inch long equalizer.
    view full answer...
  • Trailer Equalizer Kit Recommendation that are 5 inches Long
    Best option we have would be the part # APT5 which comes with equalizers that have outer bolts that are 5-3/4 inches apart on center which would be close enough to work in your application. The shackle straps are 2-1/4 inches long and the bolts are 9/16 inch which is the standard diameter for trailer suspension bolts.
    view full answer...
  • Replacement Equalizers and Leaf Springs for Tandem Axle with 3,500 lb Axles
    Sounds like it's a good time to replace all of the leaf springs and equalizers. So for springs the part # SP-212275 would be a great option as this is a tiny bit shorter than your current springs (they stretch slightly over time), and they are rated for 3,500 lb axles. Then for an equalizer kit the part # AP233 would replace all of your bolts, equalizers, shackles, and nuts.
    view full answer...
  • Recommended Equalizer Kit for 3-Leaf Double-Eye Spring # SP-220275
    Along with the Universal Group 3-Leaf Double-Eye Spring # SP-220275 that you referenced, it sounds like you are needing a replacement Equalizer Kit for your trailer. Based on the dimensions you provided, I recommend taking a look at the Redline Tandem-Axle Trailer Equalizer Kit # AP233. This kit includes two equalizers that measure 5-3/4 inches long from the center of one spring eye to the center of the other spring eye. I have included an image that clarifies its dimensions. We do not...
    view full answer...
    Image 1 for
  • How to Choose the Correct Equalizer
    There is unfortunately no master list of every part number of every model of every year of trailer, so you would need to measure to find replacements. For example, equalizer # TREQE1 fits 1-3/4" wide, double-eye leaf springs with 9/16" spring eyes, has bolt hole diameters of 9/16" and is 7-3/4" from center of bolt hole to center of bolt hole.
    view full answer...
  • Should Nylon Bushings in Tandem-Axle Trailer Equalizer Kit AP233 Be Greased
    When installing Tandem-Axle Trailer Equalizer Kit # AP233 or a similar kit you will probably find it easier to insert the shackle bolts into the bushings if you lightly grease the bolts. A small amount of lubrication will both aid installation and provide a degree of lubrication for the whole assembly. You can use a general-purpose lithium grease like # L11316.
    view full answer...
  • Do Trailer Suspension Equalizer Kits Come with Leaf Spring Bushings
    Most leaf springs for trailers come with bushings so the equalizer kit part # AP233 does not include them. We offer some bushings though if you are in need of them. I attached a link to a page that has all of them. You will need to determine the inner and outer diameters that you need plus the width. A very popular one is the part # TRBU11566 that has an ID of 9/16 inch, is 1-3/4 inches long and has an OD of 11/16 inch.
    view full answer...
  • Do Trailer Suspension Equalizers Carry Weight Ratings
    Trailer suspension equalizers like # TREQ104 do not carry weight ratings but they are available in many different sizes. They will handle as much weight as any springs you'll be using with them. Part # TREQ104 measures 5-3/4-inches between its lower hole centers and kit # AP233 includes this same item among its component parts.
    view full answer...
  • Recommended Equalizer Kit For 5,000 lb Axles On Tandem Axle Trailer
    The Tandem-Axle Trailer Equalizer Kit for 1-3/4" Wide Double-Eye Springs - 5-3/4" Long # AP233 is designed for use on trailers with tandem, 2,000-lb to 7,000-lb axles. This means it is rated for systems with up to a total weight of 14,000 lbs. This will be a kit that absolutely can be used for your tandem 5,000 lb axles. You may also want to consider the Tandem-Axle Trailer Hangers for 1-3/4" Wide Double-Eye Springs - 3-1/4" Tall Front # H248 if you don't have hangers for your system yet.
    view full answer...

< Previous
123. . .4

Do you have a question about this Trailer Leaf Spring Suspension?

  • Why

    At we guarantee:
  • Highest quality trailer leaf spring suspension for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer leaf spring suspension information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Brian T
Updated by:
Brian T
Employee Mike S
Updated by:
Mike S

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.