1. Trailer Leaf Spring Suspension
  2. Universal Group
  3. Leaf Springs
  4. Springs
  5. Double Eye Springs
  6. 26 Inch Long
4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long

4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long

Item # SP-051275
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Trailer Leaf Spring Suspension
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4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long Leaf Springs SP-051275
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Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 4,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushings with 9/16" inner diameter. Lowest Prices for the best trailer leaf spring suspension from Universal Group. 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long part number SP-051275 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (185)
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Universal Group Trailer Leaf Spring Suspension - SP-051275

  • Leaf Springs
  • Springs
  • Double Eye Springs
  • 26 Inch Long
  • 4000 lbs
  • Universal Group

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 4,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushings 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 bushings included
  • Pre-mounted hangers or aftermarket hanger kit (sold separately) required for installation
    • Spring attaches to hanger mounted on trailer frame at one end
    • Other end connects to shackle straps suspended from hanger or equalizer


Specs:

  • Quantity: 1 leaf spring
  • Spring capacity: 2,000 lbs
  • Axle capacity: 4,000 lbs
  • Length from center of spring eye to center of spring eye: 26"
  • Spring width: 1-3/4"
  • Eye diameter with bushing: 9/16"
    • Eye diameter without bushing: 11/16"
  • Leaf thickness: 3/8"
  • Number of leaves: 4
  • Additional dimensions: see table


Double-Eye Spring

Part NumberABCD
SP-05127513"14"26"4-1/4"


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.


Double-eye leaf springs attach to hangers that are welded onto your trailer. One end of this spring will attach directly to the hanger with a suspension bolt. The other end will attach to shackle straps that are suspended from a hanger. These straps allow the spring to move and pivot so that it can better compensate for uneven pavement. If you have a tandem- or triple-axle trailer, the shackle straps will be attached to the equalizer that connects multiple springs.


To mount this spring, you will need hangers, shackle straps, and suspension bolts. If you are simply replacing a spring, you may still have hangers welded onto your trailer. You should, however, replace your shackle straps because they are usually the first component to wear out. You may choose to replace old suspension bolts as well. It is 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-051 Universal Group Double Eye Trailer Leaf Spring - 4 Leaf - 2,000-lb Capacity






Customer Reviews

4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long - SP-051275

Average Customer Rating:  4.9 out of 5 stars   (186 Customer Reviews)

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 4,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushings with 9/16" inner diameter.

- SP-051275
by:

Nice springs for the dollar. No complaints! Would like to find some local spring manufacturer, as made in USA is important to me! 673063



- SP-051275
by:

Using etrailer.com has been a great experience. They have a huge selection of trailer parts and make it very easy to find the right parts. The packaging seems to have gotten alot better. Very sturdy box. It arrived within a few days from ordering which was a huge plus. I was able to get the job done sooner than planned. That kind of experience will keep me loyal to etrailer for any future trailer parts needs. Thanks guys and gals. Keep up the great work. As far as the parts, eveything was heavier duty than factory. Since I measured the old parts I was able to find the exact replacements for those parts. The job went so smoothly without any issues. These springs raised the trailer height without any load on the axles 1.5 inches. It was definitely time for new springs and hardware. Im kind of glad the one spring broke. 469464



- SP-051275
by:

These springs are much stronger than what I first ordered, thank you for sending my return tag, I measured wrong the first time. These springs with an inch shorter in length & an inch more arch work perfect & give the tires more room. Thanks again for the great service from all of your operators. I must say, even with shipping the experience & service was well worth it. 374448


Comments
holding strong! tires running true.
Jerry k - 05/02/2018

38041

- SP-051275
by:

I replaced 3500lb axle springs with these 4000lb axle springs. Super easy. Good fits all the way around. Also suspension upgrade from Moryde, new Goodyear endurance on steel. Correct parts every time, faster delivery than anywhere. Too easy. Dont waste your time going anywhere else. 638015



- SP-051275
by:

Very quick shipping and notification all the way thru 905241



- SP-051275
by:

Everything came in a quick delivery and good tracking. 903209



- SP-051275
by:

As usual, the order was shipped and received quickly. Parts were the quality I expected and no issues on fit. Email communication was very good. Never had any issues on numerous orders in the past. 904735



- SP-051275
by:

No issues, fit as it should 901319



- SP-051275
by:

899642



- SP-051275
by:

Very fast. I could tract every step of the process with a name of who received, pulled, packaged, etc. order on a Friday and received on Monday 897786



- SP-051275
by:

great price 897656



- SP-051275
by:

Awesome product and price, highly recom mend. 897007



- SP-051275
by:

Great return policy 892608



- SP-051275
by:

884790



- SP-051275
by:

Product looks good it off box. As always very fast shipping and even bear their own timeline 889570



- SP-051275
by: 09/03/2020

Lifted the trailer to the point when it was new! 873667



- SP-051275
by: 08/31/2020

872226



- SP-051275
by:

Easy to install. Excellent and reasonably priced replacement for cheap factory springs. 871953



- SP-051275
by:

E=Trailer provides me excellent customer service. I mistakenly ordered the wrong size leaf springs. As soon as I realized my mistake, I called E-Trailer. I should have wrote the lady"s name who helped me. She really deserves recognition. She was so nice, courteous, and helpful. She sent me a U.P.S. label to save me postage. She instructed me what to do and how to return the leaf springs in the original packaging. She assisted me in ordering the correct part, which was received within days. I have already recommended E-Trailer to my neighbor and I am going to make future purchases to complete my project. 863668



- SP-051275
by:

862757



- SP-051275
by:

I had a broken spring on the road and had it replaced. I considered replacing only the other three. I decided to do all four to keep everything the same. I'm glad I did. I replaced the plastic bushings with the bronze ones and grease-able bolts that came with the pivot kit I bought. There were only pieces of the original bushes left in the old springs. I had not realized how over the years my trailer had sagged. Now it's like new again. NOTE** Make sure to press the bushings in, a bench vice works fine, and do not use a hammer. They are bronze, not steel, and can be ruined. ( Just some sound advice from a 68 year old professional). 858703



- SP-051275
by:

The spring replacement went well and was easy to complete. It lifted my trailer about 1.5 inches from the top the tire to the fender. It wont rub anymore!! 859056



- SP-051275
by:

very good quality of material 857089



- SP-051275
by:

1st class products and service!! 852344



- SP-051275
by:

Ordered was promptly received and shipped. Arrived when expected. Not damaged. All has been good. Will be ordering another set. I don't have any pictures at this time 850030


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Show More Reviews

Ask the Experts about this Universal Group Trailer Leaf Spring Suspension

  • Leaf Spring and U-Bolt Kit for Dexter 4,000 lb Axle
    Yes the leaf spring part # SP-051275 would be the correct spring for your 4,000 Dexter axle. This is a very standard length trailer leaf spring at 26 inches and will work well on your trailer. Then for a U-bolt kit part # APUBR-1 would be what you'd need and then for shackle bolts part # 166081.
    view full answer...
  • How Far Apart Should the Leaf Spring Hangers Be Spaced With a 26 Inch Long Leaf Spring
    When using the 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles part # SP-051275 with the Single-Axle Trailer Hanger Kit for Double-Eye Springs part # APS4 you will need to space the leaf spring hangers 25-3/4" apart.
    view full answer...
  • 25-1/4 inch Leaf Spring Recommendation for Travel Trailer with Tandem Axles
    20 year old leaf springs on a trailer could easily stretch 3/4 of an inch. Going with a 25-1/4 inch spring like you mentioned would be great. Since your springs are 3 inch in diameter that would indicate that most likely you have a 5,200 lb axle as that's a very common rating for that size. For a 25-1/4 inch length spring we have the part # SP-218275 which has a 5,000 lb capacity. # SP-220275 which has a 4,000 lb capacity, and # SP-115275 which has a 6,000 lb capacity. Suspension components...
    view full answer...
  • How to Determine Correct Leaf Springs for Trailer Axles
    Really the best way to determine the correct leaf spring for your axle is by measuring the length from the center of one spring eye to the center of the other eye if you have double-eye springs, or from the center of the spring eye to the end of the spring if you have slipper springs. Additionally, an accurate length for a leaf spring can only be measured with the trailer unloaded and on jacks. I have added a link to help articles on both double-eye leaf spring and slipper spring suspension...
    view full answer...
  • Replacement Double-Eye Leaf Springs Needed for a 2002 DHM Trailer
    Since leaf springs will stretch over time I recommend going with the 4-Leaf Double-Eye Spring # SP-051275 which is 26" long from center eye to center eye and is rated for a 4,000 lb trailer axle. This leaf spring has a width of 1-3/4" and a thickness of 3/8". I have attached a review video for you to check out as well.
    view full answer...
  • Replacement Leaf Spring Recommendation for 3,500 lb Trailer Axle to Replace 25-3/4 inch Spring
    The correct leaf spring you need is the part # SP-212275. This is a 3,500 lb axle spring that measures 25-1/8 inches in length. Since old springs stretch out over time this spring would be exactly what you need when you consider your current spring was around 1/2 an inch shorter when new.
    view full answer...
  • Correct Orientation of Straps/Clips on Leaf Spring Packs
    The strap you're pointing out in the photo is known as the rebound clip. It's meant to help prevent some axle wrap and to help keep the main leaf from breaking during a rebound. The spring should be installed so the straps are toward the front of the trailer. If you click the provided link, you can see an installation video.
    view full answer...
  • Will these leaf springs work SP-051275
    There a few more measurements that are needed off of your current leaf springs to guarantee that you will find the correct replacement leaf spring. I have attach a diagram that will show the other measurements that are needed. You have the first measurement with the eye-to-eye distance. To find the correct replacement you will also need the spring height, measured from top of the center of the spring to the center of the eye. Also needed is the distance from the spring center to the...
    view full answer...
  • Can I Upgrade Leaf Springs on Utility Trailer With 3500 Lb Axle
    You can upgrade the 1750 lb leaf springs to 2500 lb leaf springs. You do want to keep in mind that the ride may be a bit stiffer since you are upgrading your springs to a higher capacity. Like you mention upgrading the springs will not give you a higher weight capacity because the axle is still rated for 3500 lbs. The only benefit may be that the springs last a bit longer because of the higher capacity. The new springs do need to be the same measurement spring eye to spring eye accounting...
    view full answer...
  • Replacement Trailer Leaf Springs for 5200-lb Axle
    When a trailer leaf spring is well worn it can become elongated. Springs can flatten out and become as much as a 3/4-inch longer, measured eye to eye, than when they were brand new. So the correct replacement spring for your suspension might measure shorter than the worn spring you removed. That said, we do have several 26-inch leaf spring for various axle ratings from 2000- to 6000-lbs. The linked page displays all leaf springs and the filters on the page will let you select the axle...
    view full answer...
  • Replacing 4-Leaf Double Eye Springs with 6-Leaf Double Eye Springs on 4,400 Pound Axle
    Installing slightly over-rated leaf springs on a trailer shouldn't cause any damage to the axle or other suspension components. There is no reason to replace the axle on your trailer with a higher-rated unit so that it matches the springs. Over-rated leaf springs may cause a bit of a rougher ride but I suspect that the "springy" experience you described has more to do with the noticeable difference between old worn-out springs and brand new ones that are in good condition. The difference...
    view full answer...
  • Recommended 26 Inch Leaf Springs for 3750 lb Tandem Axle Boat Trailer
    The 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long # SP-051275 will be the closest fit for your 3750 lb axle. Having leaf springs rated slightly higher is normal because you will be limited in capacity by the weakest component on your trailer and normally you want that to be your axle. These springs will not be too strong for that axle as to cause too firm a ride.
    view full answer...
  • Replacement 26 Inch Leaf Springs, Shackle Straps, And U-Bolts
    To give you the correct leaf springs, I would need to know the capacity of your axle or what your Gross Vehicle Weight Rating (GVWR) is not just the weight of the trailer itself. This is the loaded capacity of the trailer. We have a few options for 26 inch leaf springs: 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long # SP-051275 4-Leaf Double-Eye Spring for 2,000-lb Trailer Axles - 26" Long # SP-124275 6-Leaf Double-Eye Spring for 4,500-lb Trailer Axles - 26" Long...
    view full answer...
  • Replacement 4-Leaf Spring Recommendation for Trailer with 26-1/4 inch Old Springs
    In terms of lengh and capacity the best option we have is the 4k axle part # SP-051275 which is 26 inches long and is a 4 leaf setup. Springs tend to stretch a little bit over time so your old ones measuring 26-1/4 inches would be ideal for this spring. If your equalizers and shackles are in good condition still you wouldn't need to replace them. If so email me the dimensions of them and I will see what we have that would work well.
    view full answer...
  • Selecting Replacement Leaf Springs for Enclosed Trailer
    Leaf springs stretch with use and age and to make sure you match their length, as well as their capacity, you will want to pull one out of the trailer's suspension so you can measure its eye-to-eye length. A well-used spring can stretch as much as 1/2-inch from its original length. If your hanger hole spacing is 25-inches on center then you may well need a 25-1/4-inch like # SP-220275 but the length of your shackles comes into play too. The spring eye dimension should be longer than...
    view full answer...
  • Replacement Leaf Springs, Equalizers, and U-bolts for ALKO T52 Axles
    Those may not be the original springs on your Springdale. According to ALKO the T52 axle would either have a 5 or 6 leaf spring at a length of 26 inches. To be accurate the springs should be measured with no weight on them because they will otherwise flatten out some leading to a longer measurement. ALKO shows the 4-leaf spring for the T52 at a length of 25-1/4 inches. If you measure it at about 25-1/4 inches with no weight on the spring then you can use # SP-218275 for 5K axles. If...
    view full answer...
  • How to Replace 26-1/2 inch Leaf Springs on Trailer
    Since old springs tend to stretch out about 1/2 inch you would want a 26 inch spring to replace what you have. Which we carry several. See the attached link. You would need to select the filter on the page that has the axle capacity that matches your trailer and it would be the correct fit. The part # SP-051275 that you referenced is for 4,000 lb axles.
    view full answer...
  • Clearance Requirements Between Trailer Tires and Fenders and How to Calculate Tandem Axle Positions
    As far as clearance between the tops of the tires and the bottoms of the fenders look for at least 3 inches to account for the suspension travel. As far as the placement of the axles it all depends. Take a look at the picture I have included that shows how to calculate axle position. You might have to do some estimating but it will at least get you close to the ideal positioning.
    view full answer...
  • Replacing Slipper Springs With Double-Eye Springs
    There are no U-bolts to attach the slipper part, I recommend replacing your slipper springs with double eye springs. In order to do this you need to know the weight rating of your axle as well as the length from center eye to center eye so you can properly place your hangers. For example, the 4-Leaf Double-Eye Spring # SP-051275 measures 26 inches from center of spring eye to center of spring eye and has a 4,000 lb capacity; you will need to find springs that match your trailer's capacity...
    view full answer...
  • Leaf Spring Recommendation for 10k Trailer with 26-1/4 inch Springs
    Your 10k trailer with dual axles is going to have two 5k rated axles (most likely). The only double eye spring we have that would match that capacity is the part # SP-218275 but it would be about an inch too short as it measures 25-1/4 inches. You should note that old springs typically stretch out around 1/4-1/2 inch as they flatten over time. Dimensionally the correct spring we have would be the part # SP-051275 as it is right at 26 inches. This is for a 4k axle though. Best...
    view full answer...
  • Can Boat Trailer Replace Slipper Springs With Double Eye Springs?
    Yes, you can replace your slipper springs with double eye springs. The Double-Eye Spring # SP-051275 measure 26 inches from center of spring eye to center of spring eye and would work for you; these have a 2,000 lb capacity each though you will need to find springs that match your trailer's capacity as closely as possible. The other thing you would need is a hanger kit such as # APS3, which has 1-1/2" tall front hangers, 1-1/4" tall rear hangers, and 3-1/8" shackle straps. The correct...
    view full answer...
  • 25-1/4 inch Long Trailer Leaf Spring Recommendation for 4,000 lb Axle
    I attached a page that has all of the double eye springs we carry that are 25-1/4 inches long from eye to eye. For a spring with the same capacity as the one that you referenced the part # SP-220275 would be what you need.
    view full answer...
  • Replacement Spring for Boat Trailer
    Thank you for the information. When it comes to replacement springs, the eye-to-eye distance and weight capacity are the most important factors. Springs flatten - or stretch - over time, so your 26-3/4 inch springs were likely 26 inches. There are two possible four-leaf options for you, and the right one will depend on your axle's weight capacity. Spring # SP-051275 is for an axle with a capacity of 4,000 lbs. The other spring is # SP-124275, which is for an axle with a capacity of...
    view full answer...
  • Measuring for Replacement Trailer Leaf Springs
    The best way to measure you springs is with them removed from the trailer. And it's likely they've flattened over time and weren't originally 26 inches. They may have stretched up to 3/4 of an inch. The length and weight capacity is more important than the number of leaves. As long as the replacement fits and is rated properly it will work for you. I've linked an article on trailer suspension you may also find helpful.
    view full answer...
  • Are Leaf Springs Sold Individually or as a Pair
    The 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long part # SP-051275 are not sold in pairs at this time. You will need to purchase 2. We do recommend to replace all of the leaf springs on the trailer at the same time because leaf springs sag over time.
    view full answer...
  • Replacement Leaf Springs for 2001 Coachmen Tandem Axle
    For the capacities of the 2001 Coachman tandem that you have and the unloaded length of the springs you mentioned the # SP-051275 would be your best choice. This is for a 4,000 lb axle which is most likely a little higher rated than what you have as I suspect you have 3,500 lb axles and it also matches the length of your old springs well so it would be the easiest and best choice! A slightly higher rated spring might raise the trailer slightly, especially when compared to springs that were...
    view full answer...
  • Tips for Picking Out Travel Trailer Leaf Springs to Replace 20 Year Old Springs that Measure 26 in
    Leaf springs do have a tendency to stretch as they age. With springs 20 years old I'd imagine they've stretched a decent amount. Most likely you'd need a spring in the 25-1/8 inch to 25-1/4 inch range but we also need to determine capacity axles you have so that we can pick you out the correct rated spring. Due to the age of your trailer suspension it would be a great idea for you to replace all the springs now too. If you aren't sure of the axle capacity let me know the diameter of the...
    view full answer...
  • Zinc Platted U-Bolt or Square 2” Wide x 3" Tall Trailer Axles
    I looked up your order and the 4-Leaf Double-Eye Spring part # SP-051275 you have is about 1-1/2" thick. Since you axle is 3" tall you would need a u-bolt that is at least 4-1/2" tall. Therefore, I recommend taking a look at the Replacement U-Bolt part # UBZC12X212X525 which is 5-1/4" long x 2-1/8" wide. This u-bolt is zinc plated and for the correct lock-nut you will want to use part # 12ZLN.
    view full answer...
  • How to Pick Out Replacement Leaf Springs for Boat Trailer
    When replacing trailer leaf springs we strongly recommend you replace them in pairs. I would urge you to get a set of matching properly rated springs for your trailer as soon as possible. If you look on the frame of your trailer there should be a plate with the trailer VIN number and the axle capacities of the trailer. You will want to pick leaf springs that are as close to the axle capacity as possible. You will want to also measure the distance from eye to eye of your old leaf springs...
    view full answer...

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Info for this part was:

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