bing tracking image
  1. Trailer Leaf Spring Suspension
  2. Universal Group
  3. Leaf Springs
  4. Springs
  5. Slipper Springs - 2 Inch
  6. 29-1/2 Inch Long
6-Leaf Slipper Spring w/ Hook End for 8,000-lb Trailer Axles - 29-1/2" Long

6-Leaf Slipper Spring w/ Hook End for 8,000-lb Trailer Axles - 29-1/2" Long

Item # SP-161275
lowest price pledge
Our Price: $112.13
Trailer Leaf Spring Suspension
This item qualifies for Free Shipping
Shipping Weight: 26 lbs
Quantity: 
In Stock
SP-161275 - Slipper Springs - 2 Inch Universal Group Springs
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

Need help with installation?
Locate installers near me
Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for an 8,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter. Lowest Prices for the best trailer leaf spring suspension from Universal Group. 6-Leaf Slipper Spring w/ Hook End for 8,000-lb Trailer Axles - 29-1/2" Long part number SP-161275 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (39)
  • Q & A (0)
  • Photos
  • Why etrailer?

Universal Group Trailer Leaf Spring Suspension - SP-161275

  • Leaf Springs
  • Springs
  • Slipper Springs - 2 Inch
  • 29-1/2 Inch Long
  • 8000 lbs
  • Universal Group

Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for an 8,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter.


Features:

  • Leaf spring acts as part of your trailer's suspension system
    • Provides attachment point for your trailer's axle
  • Multiple leaves allow flexibility to absorb road shock
    • Allows for a smooth ride
    • Reduces wear and tear on trailer
    • Ensures level ride on bumpy and uneven surfaces
  • Sturdy steel construction
  • Nylon bushing included
  • Pre-mounted hangers or aftermarket hanger kit (sold separately) required for installation
    • Eye of spring attaches to hanger mounted on trailer frame
    • Slipper end slides into hanger or equalizer


Specs:

  • Quantity: 1 leaf spring
  • Spring capacity: 4,000 lbs
  • Axle capacity: 8,000 lbs
  • Length from center of spring eye to end of spring: 29-1/2"
  • Spring width: 2"
  • Eye diameter with bushing: 9/16"
    • Eye diameter without bushing: 11/16"
  • Leaf thickness: 3/8"
  • Number of leaves: 6
  • Additional dimensions: see table


Hook End Slipper Spring

Part NumberABCDEF
SP-16127513-1/2"27-7/8"29-1/2"14-1/8"16-1/2"3-1/2"


Note: To ensure proper axle alignment and suspension performance, leaf springs should always be replaced in pairs.


Leaf springs are an integral part of your trailer suspension system. The leaf springs provide the attachment points for your trailer's axle, suspending it from the frame of your trailer. Each spring flexes to absorb road shock as you travel, allowing the axle to move somewhat independently of the rest of your trailer. This helps to reduce wear and tear on the trailer and also ensures a smooth ride.


Slipper leaf springs attach to hangers that are welded onto your trailer. The eye of this spring will attach to the front hanger with a suspension bolt. The hooked slipper end of the spring will slide into the rear hanger. If you have a tandem- or triple-axle trailer, the slipper end will slide into the equalizer that connects multiple springs. The shape of the slipper end of a leaf spring may vary slightly due to differences among trailer manufacturers. Because of this, it's important to check your leaf spring's slipper end before purchasing a replacement spring.


To mount this spring, you will need hangers, a suspension bolt, and possibly a spring keeper bolt, depending on the design of the rear hanger. If you are simply replacing a spring, you may still have hangers welded onto your trailer, but it would be wise to replace the bolts as they can experience wear. It is also recommended that you replace the other leaf spring in your setup at the same time. Because springs can sag and elongate as they wear, this new spring may not exactly match the old one, and the alignment of your trailer could be affected.


If you are fabricating a trailer, you will need to purchase a hanger kit for installation. To determine the type of hanger kit that you need, you must know the specific type of leaf spring that you have, as well as your axle capacity. Depending on the hanger kits used with them, springs can be configured to work for single-, tandem- or triple-axle applications. Hangers and other suspension components can also be purchased separately if there isn't a complete kit that works for your setup.



UNA-161 Universal Group Slipper Trailer Leaf Spring - 6 Leaf - 4,000-lb Capacity

Replaces E5115






Customer Reviews

6-Leaf Slipper Spring w/ Hook End for 8,000-lb Trailer Axles - 29-1/2" Long - SP-161275

Average Customer Rating:  4.9 out of 5 stars   (39 Customer Reviews)

Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for an 8,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter.

by:

Excellent service and timely delivery, thank you!


Comments
Still working great after 1 year, thank you for the great service!
Aaron H - 12/23/2021

by:

I have ordered three hitches from Etrailer. Best experience with a company ever. Best product best service ever. Hands Down. Thanks eTrailer. Ordering a Ball and a ball mount today.



by:

easy to look up by type and measurement, looks to be a quality product
received in a timely manner



by:

I put these on my 7000# axle. They fit exactly correct. .I would break at least two springs per year on my delivery trailer. I am hoping that these stronger 8000 # springs will save me a lot of emergency work down the road. I am confident that these are the last springs I buy for this trailer.



by:

WOW!! Ordered 6-4000lb leaf springs, late on a Fri evening, got an e-mail conformation as soon as I ordered. Received an e-mail on SATURDAY that my order had been shipped! (FREE SHIPPING) and three days later I had my springs! WOW again! Now that is excellent service. And by the way this is the first review I have ever wrote.
SAMUEL P.
TWO TOIES TOWING LLC



by:

I am a fleet manager and at times it is hard locating parts for some of our older equipment. I needed heavy springs for a heavy duty wagon, and I was able to find them here. The price was competitive, the shipping was quick and the springs were a good fit and I was able to get the trailer back into service. I look forward to doing business with e trailer again



by:

Quick and accurate. I purchased springs to match existing on trailer. I contacted costumer service via phone prior to purchase. The person I talked to was helpful and knowledgeable. I placed the order online on a day they were offering free standard shipping. That saved a chunk of money on a 50lb purchase. I recieved my springs on time and got them installed.



by:

Exactly what I needed to get a trailer repaired and back on the road. Far better quality than the springs that are available locally if they had them in stock.



by:

Had broken springs on cattle trailer. Your info of your spring was easy to use to match mine for a perfect fit! Highly recommend you to anyone!



by:

My second purchase from etrailer and I am happy to say the results were as expected 1. Items as described 2. Delivery was on time as promised (Of course once it is out the door it depends on the carrier to make the promise good) 3. Customer service is stellar, notifications... we got your order....we shipped it today.... we were notified it was delivered.... are you happy



by:

Good replacement part, very close to being identical to original, no problems.



by:

Package arrived as promised
Quick delivery

Rep Mariah was very helpful and pleasant to deal with!
This is second order from etrailer and I will probably now use them exclusively for all my trailer needs!



by:

A quick replacement for 2 worn and damaged springs on one of our trailers. This was an exact fit, and the product selection page made an easy job of selecting the proper spring.



by:

Super fast shipping very reasonable rates. etrailer always seems to have those harder to find trailer parts I'm looking for Great to do business with.



by:

nylon bolt hole bushing is war out



by:

Right parts, at the right price. Very pleased with the prompt shipment, tracking, and follow up email. Would definitely recommend highly to everyone.



by:

The product I received was excellent and fit perfectly on my trailer



by:

works well



by:

Springs have been working great with no issues at the one year mark! Thanks so much!



by:

Great product and shipping was fast. Exactly what I needed.



by:

Good product, fast free shipping, excellent customer service, good price



by:

Good product, fast free shipping, excellent customer service, good price



by:

Good product, fast free shipping, excellent customer service, good price



by:

Good product, fast free shipping, excellent customer service, good price



by:

Good product, fast free shipping, excellent customer service, good price


25
39
Show More Reviews

Ask the Experts about this Universal Group Trailer Leaf Spring Suspension



  • Recommendation For Slipper Springs That Are 29 Inches Long And 1-3/4 Inches Wide
    Unfortunately, I do not have an exact match in our available inventory. Often springs flatten and become longer as they get older. If this has happened with your springs then they are longer than when first installed. What I do have that is close and that might work is a 4-Leaf Slipper Spring w/Open Eye End that is 26-1/4 inches long, Item # SP-264275. It is 1-3/4 inches wide and designed for 4,300-lbs axle. Because your total length is 29-1/2 inches and the bolt to spring measures...
    view full answer...
  • Can 6-Leaf Slipper Spring 8000lb SP-161275 Be Installed On 7000lb Trailer Axle?
    As long as the 29-1/2" length of the 6-Leaf Slipper Spring # SP-161275 you were looking at matches the current slipper springs used with your 7000lb axles then yes, they will work. You can confirm the length of your current slipper springs by jacking the trailer up so that there is not weight on the springs and measuring from center of spring eye to the end of the slipper spring as shown in the included picture. With that said this spring will be slightly stiffer than your current springs...
    view full answer...
  • What Replacement 6-Leaf Slipper Springs do I Need for My Rockwell Spring?
    I have a great leaf spring solution for you. Unfortuantely, we do not carry the Rockwell 4361-40 6-leaf slipper springs you mentioned in your question. However, we do carry a model that has identical measurements as the 4361-40 springs. That is the 6-Leaf Slipper Spring w/ Hook End for 8,000-lb Trailer Axles - 29-1/2" Long # SP-161275. Since this part comes in a quantity of 1 spring, you will need to order 2. I went ahead and linked a review video for you to check out that walks you through...
    view full answer...
  • Leaf Springs for 8K-Rated Axle
    We do offer both double-eye and slipper-type leaf springs for many axle weight ratings. You can see all of these leaf springs on the page I linked for you. In the 8K axle capacity we offer two slipper-type springs. Part # SP-161275 is a 6-leaf slipper spring that is 29-1/2-inches long. Part # SP-285275 is a 7-leaf spring that measures 26-5/8-inches. Both are 2-inches wide. Please note that leaf springs tend to stretch when they are worn so the length of the old spring you remove may...
    view full answer...
  • Are Double Eye Leaf Springs Rated For 8,000 lb Axles
    Thank you for that detailed information and what I can tell you is that when choosing leaf springs, the actual number of leafs isn't the most important thing, the weight rating and center-eye to center-eye measurement is what you need to know. I have added a cut out from the help article on double eye trailer suspension which I highly recommend reading. We do not carry double eye springs rated for 8,000 lb axles and there is no way for us to know the rating of your currently installed...
    view full answer...
    Image 1 for
  • Replacement Springs for Sanibel 3500 with Dual 8000-lb Dexter Axles
    Since you have 8000-lb axles, we know that they will use slipper springs and I can narrow your options down to 2 different sized replacement springs for your Sanibel 3500 5th Wheel. In order to choose the right one you'll need to determine the length of the spring. You can measure the length of the spring from the center of the eye on one side to the end of the spring. If you have 29-1/2" long springs you will need # SP-161275 . If you have 26-5/8" long springs you will use # SP-285275...
    view full answer...
  • Options For Replacing Broken 7-Leaf Slipper Spring
    For a 2" wide by 29-1/2" slipper spring we have two options. The 6-Leaf Slipper Spring w/ Hook End, # SP-161275 rated for 8,000 lbs. (spring capacity of 4,000 lbs., axle capacity of 8,000 lbs.) And the 8-Leaf Slipper Spring w/ Radius End, # SP-284275 rated for 10,000 lbs. (spring capacity of 5,000 lbs., axle capacity of 10,000 lbs.) The quantity of leaf springs is not the point to focus on, the weight rating is. What we have available does not support adding an additional leaf. My suggestion...
    view full answer...
  • What is the Hanger Spacing on the 6-Leaf Slipper Spring # SP-161275?
    I went ahead and attached a diagram that shows the spacing of the hangers on the 6-Leaf Slipper Spring w/ Hook End for 8,000-lb Trailer Axles - 29-1/2" Long # SP-161275. This is the spacing you will use with the Tandem-Axle Trailer Hanger Kit for 2" Slipper Springs - 12" Long Equalizers # APT6SE.
    view full answer...
    Image 1 for
  • Highest Capacity 1-3/4" Wide Slipper Spring
    The highest capacity 1-3/4" wide slipper spring we offer is 3,700 lbs part # SP-040275 which measures 30" long end to end. If you need a higher capacity then you will need to upgrade the hangers and equalizers to accept 2" with a kit like the Tandem-Axle Trailer Hanger Kit for 2" Slipper Springs part # APT6SE so you can use the 6-Leaf Slipper Spring w/ Hook End for 8,000-lb part # SP-161275.
    view full answer...
  • Hanger Spacing for Tandem-Axle Trailer Hanger Kit AP216-H238 and 29-1/2 Inch Slipper Springs
    When using trailer suspension hanger kit # AP216-H238 with spring E5115, # SP-161275, the distance from the center of the front hanger to the center of the middle hanger AND the distance from the center of the middle hanger to the center of the rear hanger are both 31 inches. Measurements for hanger kits are approximate and it is recommended to mock up the suspension to get the proper spacing prior to permanent installation.
    view full answer...
  • Spring Spring Hanger Spacing for Spring SP-161275
    The B dimension on a slipper spring is the distance that should be between the hanger and the mounting point on a slipper spring equalizer. For example the part # SP-161275 that you referenced should have a distance of 24-7/8 inches between the first hanger and the equalizer mounting point. Since equalizers can have different lengths there isn't a standard dimension with this spring. Let's use hanger kit part # AP202-H238 as an example. The first hanger of the hanger kit part # AP202-H238...
    view full answer...
    Image 1 for
  • Hanger Kit Recommendation for use with 29-1/2" Slipper Springs with 7000-lbs Tandem Axles
    Yes. You can use the Tandem-Axle Trailer Hanger Kit # AP216-H238 with your 29.5" Slipper Springs # SP-161275; you'll want to make sure that you space your axles 35-1/8" apart (center on center) when assembling your trailer to correctly fit the # SP-161275 springs and the # AP216-H238 hanger kit. The # AP216-H238 kit comes with everything you need to mount your leaf springs including the hangers, equalizers and mounting hardware. You'll want to make sure that the hangers are installed by...
    view full answer...
  • Dexter Tandem-Axle Trailer Hanger Kit for 2 Inch Slipper Springs
    Yes, the Dexter Tandem-Axle Trailer Hanger Kit for 2" Slipper Springs item # HAP-105-205-01 will work with Universal Group 6-Leaf Slipper Spring item # SP-161275. These slipper springs are 29-1/2" Long. You will want to ensure the distance between the front and center hangers is 32-2/5", the distance between the u-bolts on your axles is 38", the distance between center and rear hangers is 32-9/10", and the distance between the center of the axle and your trailer's frame is 4 7/8".
    view full answer...
  • Axle Spacing To Use 29-1/2 inch Long Leaf Springs with Slipper Axle Tandem Hanger Kit # AP216-H238
    With 29-1/2 inch leaf springs like the # SP-161275 that you referenced the axle spacing you'll want to use with the hanger kit part # AP216-H238 would be 35-1/8 inches. You cannot use the over under kits we offer with slipper springs.
    view full answer...
  • Distance Between Hangers When Installing Slipper Springs
    The B dimension on a slipper spring is the distance that should be between the hanger and the mounting point on a slipper spring equalizer. For example the part # SP-161275 that you referenced should have a distance of 24-7/8 inches between the first hanger and the equalizer mounting point. Since equalizers can have different lengths there isn't a standard dimension with this spring. Let's use hanger kit part # AP202-H238 as an example. The first hanger of the hanger kit part # AP202-H238...
    view full answer...
    Image 1 for
  • Slipper Spring and Tandem Axle Hanger Kit Recommendation for a 14k Trailer
    Both slipper springs and double eye springs will work just as well as the other as long as they are rated for the weight of the trailer. Typically slipper springs are seen more on the heavier capacity trailers. For an 8k axle rated spring you really only have the option of slipper springs. You would want the # SP-161275 like you referenced. For a tandem axle hanger kit for use with this spring you would then want the part # AP216-H238.
    view full answer...
  • How to Determine Correct Replacement Slipper Springs for Triple Axle Trailer With 8,000 lb Axles
    I can help you determine exactly what you need to replace the suspension in your triple axle trailer, although we don't have any type of database which has each part for each year, make and model of trailer that would tell us exactly what you have on your trailer, which means you'll need to do a bit of pretty simple measuring. Since you have a triple axle trailer, with three 8,000 lb axles you will need slipper springs for that axle capacity, for which we have two of that capacity. To...
    view full answer...
    Image 1 for

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




  • Why etrailer.com?

    At etrailer.com 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 Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Alexander C
Written by:
Alexander C

At etrailer.com 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.