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1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long

1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long

Item # SP-115275

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Trailer Leaf Spring Suspension

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Universal Group Springs - SP-115275
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  • Springs
  • Leaf Springs
  • Double Eye Springs
  • 25-1/4 Inch Long
  • 6000 lbs
  • Universal Group
Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 6,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Lowest Prices for the best trailer leaf spring suspension from Universal Group. 1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long part number SP-115275 can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (28)
  • Q & A (39)
  • Videos (1)
  • Photos
  • Why etrailer?

Universal Group Trailer Leaf Spring Suspension - SP-115275

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 6,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride.


Features:

  • Leaf spring acts as part of your trailer's suspension system
    • Provides attachment point for your trailer's axle
  • Spring flexes 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
  • 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
  • Designed for use without bushings


Specs:

  • Quantity: 1 leaf spring
  • Spring capacity: 3,000 lbs
  • Axle capacity: 6,000 lbs
  • Length from center of spring eye to center of spring eye: 25-1/4"
  • Spring width: 1-3/4"
  • Eye diameter: 0.59"
    • Compatible with 9/16" bolts
  • Leaf thickness: 7/8"
  • Number of leaves: 1
  • Additional dimensions: see table


Double-Eye Spring

Part NumberABCD
SP-11527512-5/8"13-1/5"25-1/4"3"


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-115 Universal Group Double Eye Trailer Leaf Spring - 1 Leaf - 3,000-lb Capacity

Replaces TE30







Video of 1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Universal Group Trailer Suspension - Leaf Spring Suspension - SP-115275 Review

Today we're going to be taking a look at the One Leaf Double Eye Spring for 6000 pound trailer axles. This is made from a strong, durable, steel construction. Now this spring is designed to flex and absorb road shock, and provide a smoother ride. It's going to reduce wear and tear on your trailer. It's going to ensure a level ride even on bumpy and uneven surfaces. It's designed to mount to the trailer frame with hangers or a hanger kit.

Now those items are sold separately and, if you're in need of something like that, you can check out some options here at etrailer.com. This is going to contain One Leaf so it's a One Leaf Spring. Again, it's a double eye spring. A few measurements to go over with you real quick to ensure that you're choosing the right one. We want to take a look at the spring width so simply just measuring the width of the spring. That's going to be 1 and 3/4 of an inch wide.

The eye diameter, each eye is going to have a diameter, inside edge to inside edge, of 9/16 of an inch. The spring capacity is 3000 pounds and it's designed for a 6000 pound trailer axle. A few other measurements that we need to go over. We're going to take a measurement from the center of one eye to the center of the other. That's going to give us a measurement of 25 and 1/4 inches.

We also need to know the half length so that's measuring from the center of one eye directly to the center of the spring. That's going to give us a measurement of 12 and 5/8 of an inch. Now the spring height, going to lay it across straight going this direction, I'm going to take a straight edge. Place it in the center of one eye and the center of that eye, that's going to ensure a straight line. I'm going to measure from the top of the spring up to that line, and that's going to give us a spring height of right around 3 inches. Please keep in mind that bushings are not included with this spring.

It's also important to note that in order to ensure proper axle alignment and suspension performance, Leaf Springs should always be replaced in pairs. That's going to do it for today's look at the One Leaf Double Eye Spring for 6000 pound trailer axles.


Customer Reviews

1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long - SP-115275

Average Customer Rating:  4.9 out of 5 stars   (28 Customer Reviews)

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 6,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride.

- SP-115275
by:

Fantastic. Trailer rides MUCH better now with the new springs. eTrailer had them to my door FAST and customer services is top notch. You won't find a better price anywhere. I run these on a triple axle boat trailer that is both wide and heavy and they do great. The mono springs are great on saltwater boat trailers so you don't get corrosion trapped between the springs. 644188



- SP-115275
by:

Arrived just a few days after ordered and is exactly what was needed. Can't wait to get it placed on shack and back on the ice! Thank you!! 167926



- SP-115275
by:

Spring was exactly what I was looking for. The pictures with the measurements and video was awesome. Only website I could find spring on and your site was best of all for ease of searching. Thanks! 159050



- SP-115275
by:

Love the single leaf. These last and don't fall apart like the multileaf and allow for a lower trailer. For my use they work great thanks 44737



- SP-115275
by:

Don't use my trailer much but so far the springs have been good. 577821



- SP-115275
by:

Product is great and delivered very qui ckly 272554



- SP-115275
by:

Fit perfectly with no problems well sat isfied 518473



- SP-115275
by:

Webpages were easy to locate the part that I was needing. Check out fast and also easy to navigate. The leaf springs I ordered arrived in less than two days. Appreciate the prompt service 644857



- SP-115275
by:

AS PROMISED 643121



- SP-115275
by:

Very good products and very fix.to me THX. 642101



- SP-115275
by:

It was exactly what I ordered and it came right on time. I will be happy to purchase again from this company. Thank You 600073



- SP-115275
by:

great product greater service 569817



- SP-115275
by:

The product was exactly as described fit perfectly shipping was very reasonable and arrived exactly when they said it would I would recommend doing business with this company again 540921



- SP-115275
by:

The springs that etrailer sent fixed my trailer. The old springs were so bad that the axels and tires weren’t tracking properly. Thanks to etrailer that’s no more a problem 514844



- SP-115275
by:

+The price, the speed. and the knowledge was all perfect. thanks 482716



- SP-115275
by:

Excellent! 475666



- SP-115275
by:

Just what I needed, when I needed it! The fellow who filled my order noticed I chose an errant mailing choice that would have delayed it...updated me for faster delivery and no extra charge! Keep up the good work, folks! 460754



- SP-115275
by:

Products are great 336940



- SP-115275
by:

Parts arrived on time and were exactly as advertised. Very pleased with the purchase and the company. Thank you. 333775



- SP-115275
by:

Exactly what I ordered 328734



- SP-115275
by:

We received our order very quickly and was exactly what we ordered. Great company to work with. 225056



- SP-115275
by:

I recently broke a spring on my equipment trailer. Multi leaf springs are readily available but single leaf for mobile home axles are not. I was happy to find it available at "etrailer". It was delivered in the three days promised and I'm back in business. 212838



- SP-115275
by:

Shipping was supper fast, also great price for the product. I will buy from here again. 186223



- SP-115275
by:

This is the exact match for my application. Thank you guys for shipping it so fast. 3 days WOW!!! 141128



- SP-115275
by:

Thank you very much! Not a common spring. New spring was exact fit. Springs arrived on Fri, trailer back in service Sat. Will be purchasing more to restore rest of suspension. Nice to have "One-Stop-Shop" for all trailer needs. 123517



- SP-115275
by:

Very happy 110801



- SP-115275
by:

Easy to order, fast shipment. Item came as described, just what we needed. 35310



- SP-115275
by:

I keep coming back and there is a reason... the service, quality and speed. 18571


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Ask the Experts about this Universal Group Trailer Leaf Spring Suspension
Do you have a question about this Trailer Leaf Spring Suspension?


  • Replacement Trailer Leaf Spring Recommendation for Trailer with 26-1/2 inch long Springs
  • Since trailer leaf springs tend to stretch out over time when you pick out a new one you want to go with one that measures just slightly shorter than what came off the trailer. Since yours is 26-1/2 inches a 26 inch long spring like the # SP-051275 would work well if you need a 4k rated leaf spring. If you need a different axle capacity you would need to check out the link I attached that has all of the 26 inch long springs we carry.
    view full answer...

  • Dexter EZ Flex Equalizers for 6,000 Pound Axles on a 2006 Heartland Bighorn 5th Wheel
  • The length is good on the EZ Flex system # K71-653-00 but the height may be different depending on where you are measuring that 4-3/4 inches. On the EZ Flex the distance from the center of the mounting hole to the center line between the 2 bottom holes, straight up and down, is 2-7/8 inches. If your 4-3/4 inch measurement is diagonal then you will be good to go with this kit. For a u-bolt kit you can use # APUBR-9. The shocks might actually feel more effective with the EZ Flex kit...
    view full answer...

  • Picking Out Trailer Leaf Springs for Trailer with 30 inches between Hangers
  • To pick out the correct suspension components for a trailer you want to do it by most importantly picking out the springs that closely match the capacity of the axle capacity needed. That is priority one. For example if you were using the springs part # 1020, # SP-219275, # SP-111275, # SP-218275, # SP-115275, or # SP-220275 with the hanger kit part # APT5 that comes with equalizers that are 7-3/4 inches long you would want the hanger spacing to be 29-1/2 inches which is pretty close...
    view full answer...

  • Replacement Leaf Spring with Single Leaf Compared to Multi-Leaf Spring
  • The 1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long # SP-115275 will have the same capacity strength as a multi-leaf spring. It will replace a spring of the same length with the 3,000 lb capacity so it will work for a 6,000 lb axle. The benefit of not having the multi-leaf springs is the thickness is different in that this leaf spring will only have a 7/8 inch thickness making it fit well with the U-bolt around your axle. This spring will work just as well as the...
    view full answer...

  • Are Bushings Needed for the 1 Leaf Trailer Leaf Spring # SP-115275
  • The # SP-115275 spring is designed to be used without a bushing and is normally a replacement for springs on a mobile home axle. The 9/16 inch bolt will be a bit loose in this type of spring that is used without a bushing.
    view full answer...

  • Replacement Trailer Leaf Springs for Toy Hauler with GVW of 18,000 lbs
  • For a set of 3,000 lb leaf springs that would fit your trailer you would want the part # SP-115275. These are 25-1/4 inches from eye center to center which should work well as a replacement for your 26 inch long ones. Springs tend to flatten out over time which causes their overall length to increase slightly. I attached a review video for you to check out as well.
    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...

  • Replacement Double-Eye Leaf Springs for DHM Boat Trailer
  • We can help you with replacement double-eye trailer leaf springs. Do note that you always want to replace leaf springs in pairs. This is because a new spring will have a slightly different length (it will be a little shorter) than the old one; this is due to the normal elongation of the spring that happens from years of use. If you replace only one spring you can run into axle alignment issues that can affect trailer tracking and tire wear as you go down the road. Always replace both...
    view full answer...

  • Trailer Hanger Kit Recommendation for Trailer with 25-/4 inch long Leaf Springs
  • Mobile home axle components can be hard to find replacement parts for, but if you have leaf springs part # SP-115275 the part # APT9 would be a great hanger kit to use. The distance on center between the spring hanger bolt holes for dual axle setups, with the # APT9 Tandem-Axle Trailer Hanger Kit, should be 29-1/2 inches for double eye springs that measure 25-1/4 inches on center between the spring eyes and for axles that are 3 inches in diameter. This will put your axle spacing somewhere...
    view full answer...

  • Replacement Leaf Spring For 1998 Boat Trailer Carrying 18-Ft Bass Boat
  • The best fit when replacing leaf springs on a trailer is to know what the trailer and axle capacity is. There may be a plate or sticker that has that information listed. We offer one single leaf spring, part # SP-115275, and it is designed for 6,000 axles. It has a measurement of 25-1/4 inches eye center-to-center. If you are measuring the spring after it has been taken off the trailer it may have flattened a bit over time. As far as the leaves in the leaf spring, we may have one...
    view full answer...

  • Will Changing Leaf Springs Help Unloaded Ride Quality of a Trailer
  • The problem is that in order for the trailer to have the overall capacity it needs to carry what the trailer is rated for it needs to have a very stiff spring. The trade-off is that when the trailer is loaded the springs are working fine, but when the trailer is unloaded it can be pretty annoying. If you were to go with a spring that is light enough so that the trailer would not bounce around as much the trailer would also no longer have the capacity it once did. So basically you...
    view full answer...

  • Hanger Kit Recommendation for a 6K Axle on a Tandem Trailer
  • There are two spring options that would work for you, the part # SP-115275 that you referenced or the 5 Leaf Spring part # SP-111275. The only difference is that the # SP-111275 is a multi-leaf spring with a 100 lbs more capacity than the # SP-115275. Either would work fine for you, I would go with the # SP-111275 just because of the additional capacity, and with a multi-leaf spring if a leaf fails your trailer wouldn't be completely un-usable. You would be able to limp home to fix the...
    view full answer...

  • Leaf Spring Replacement For 26 Inch Measurement Eye to Eye With 4 Leafs
  • For a set of leaf springs that would fit your trailer you would want the part # SP-115275. These are 25-1/4 inches from eye center to center which should work well as a replacement for your 26 inch long ones. Yes, sometimes it is good to allow for slight variations in this measurement because the springs can sag and elongate as a result of wear. These answers are based off of a trailer with a 6000 pound axle. If your axle has a different capacity let me know and I can make different...
    view full answer...

  • Should Trailer Suspension Shackle Straps Mount Below or Above the Equalizer
  • Having the shackles below the equalizer would put the leaf spring out of level. Also, the equalizer wouldn't want to function properly and most likely the shackle would end up flipping over to the top of it or binding up/putting undue stress on the leaf spring/shackle/equalizer. You would definitely want to have the shackles mounted above the equalizer. Check out the help article I attached on trailer suspension as well.
    view full answer...

  • Replacement Leaf Springs Compatible With 10,500 lb Rated Cattle Trailer
  • The Universal Group 1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long # SP-115275 is a replacement spring for an axle of up to 6,000 lb total capacity. Each spring is rated for up to 3,000 lbs. If you have tandem axles on your trailer, then these springs will work well for your weight limits. If you have more questions, please let me know.
    view full answer...

  • How to Measure a Trailer Leaf Spring to Pick Out Correct Replacement
  • If you are trying to measure your current leaf springs so that you can pick out the correct replacement ones you will want to measure from the center of the eye to the center of the other eye. Typically springs will flatten out over time (around 1/2 inch), so you will want to pick a spring that is slightly shorter than what your current spring is. The amount of leaves isn't as important as picking out one the correct length and capacity. I attached a help article on trailer suspension...
    view full answer...

  • How to Determine the Correct Leaf Springs and Parts for Suspension 1956 Shasta Camper
  • To determine the correct parts you need to replace the springs on your trailer you will need to do some measuring and find the GVRW, Gross Vehicle Weight Rating, of your trailer. Measure the distance between the center of each eye on your trailers existing springs. The new springs you select should then match 1/2 of the trailer GVWR and the distance of the measurement you take. If you find that the measurement on your springs is 1/2 to 1 inch longer than the measurement of a spring that...
    view full answer...

  • Determining Correct Shackle Strap Size for Top Brand Tandem Axle Trailer
  • Trailer manufacturers don't usually keep a record of parts like these that they install at the factory, so I cannot be sure as to the exact length of the shackle strap that would have come originally on your trailer. With this in mind, a 3-1/8 inch long shackle like what you have is typically used on single-axle systems and would be a bit strange on a tandem axle trailer. The most common size for the type of trailer you have is a 2-5/8 inch shackle strap like # 115052. You will simply...
    view full answer...

  • Ways to Raise the Suspension of a Trailer
  • There are ways to raise a trailer's suspension, but moving the shackle straps so that they are underneath the equalizer would not be a recommended method. The most common way is to move the axles above the leaf springs if they are currently under them, or to get longer suspension hangers. The diameter of your trailer axle will determine the size of the parts that you will need to order. If your axle is 3 inches diameter, the Dexter Trailer Springs Over-Under Conversion Kit, # K71-385-00,...
    view full answer...

  • Typical Spring Deflection for Trailer Leaf Springs When at Weight Capacity
  • Typical spring deflection is up to 1-1/2 inches when at capacity. So the # SP-115275 that you referenced should see right at 1-1/2 inches of deflection when it has 3,000 lbs on it. I attached a review video for this spring as well.
    view full answer...

  • Raising the Height of a Tandem Axle Boat Trailer with Leaf Springs Mounted on Top of the Axles
  • Since the leaf spring stack is already on top of the axle on your boat trailer you can raise the height by having taller hangers welded on. I have included a link to our trailer suspension hanger main page for you. Most trailer hangers need to be welded on. Welding should be done by a professional welder. Another option is to use taller tires on the trailer provided that there is enough clearance above the existing tires to go to a size larger enough to fit your needs.
    view full answer...

  • Replacement 1 Leaf Springs For 5 x 8 Utility Trailer
  • The only 1 leaf, 1-3/4 inch wide leaf spring we offer is # SP-115275. This spring sounds like it might be a fit for your trailer. It is a single leaf double eye spring that measures 25-1/4 inches long from center of eye to center of eye. This spring is designed for use with 6,000 pound trailer axles. The part # SP-115275 includes one spring. We recommend replacing springs on both sides of the trailer at the same time. There may be a label on the axle that will give you the weight...
    view full answer...

  • Will The Redline 1-Leaf Double-Eye Spring SP-115275 for 6000lb Trailer Axles Replace A 4-Leaf Spring
  • When replacing the leaf springs on your trailer you will need to match all of the dimensions and the spring capacity as closely as possible to the original spring. Usually the measurement from eye to eye will lengthen and the height measurement will decrease with wear. See picture to the right that will show the measurements you will need to match to replace your leaf springs. If you have the 4 leaf spring on your trailer now you probably have either a 3500 lb axle or a 4800 lb axle...
    view full answer...

  • How to Pick Leaf Springs for a Trailer
  • 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 and then pick a leaf spring with the same weight capacity of your trailer axles and is slightly shorter (around 1 inch) to compensate for the sag and wear of the old leaf spring. Leaf...
    view full answer...

  • Recommended Replacement 2-Inch-Wide Leaf Spring on Old Utility Trailer
  • Thank you for providing the detailed description of your broken 4-leaf spring. If the spring is 2-inches wide as you state then it is likely to be a single-eye slipper-type spring such as those shown on the included link. If the spring has an eye on both ends then it is a double-eye spring whose width is probably 1-3/4-inches rather than 2-inches. We do not offer any double-eye leaf springs in the 2-inch width (although rare they do exist). We offer only a 1-3/4-inch width as those shown...
    view full answer...

  • Replacing 5-Leaf Spring with 1-Leaf Double-Eye Spring on Boat Trailer with Tandem 6,000-lb Axles
  • The single leaf spring you referenced, part # SP-115275, would work fine as a replacement for the 5-leaf springs you currently have. You are correct in stating that corrosion would be less of an issue with this particular spring. Make sure to replace the leaf springs in pairs by axle.
    view full answer...


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




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Info for this part was:

Expert Research:
Jameson C
Expert Research:
Adam R
Installed by:
Cole B
Photos by:
Zach O
Updated by:
Sarah W
Written by:
Alexander C
Photos by:
Jeffrey L
Updated by:
Hannah L

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