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  1. Trailer Leaf Spring Suspension
  2. Universal Group
  3. Leaf Springs
  4. Springs
  5. Double Eye Springs
  6. 25-1/8 Inch Long
4-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/8" Long

4-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/8" Long

Item # SP-221275
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Our Price: $67.38
Trailer Leaf Spring Suspension
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Shipping Weight: 14 lbs
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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. 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 6,000-lb Trailer Axles - 25-1/8" Long part number SP-221275 can be ordered online at or call 1-800-496-5010 for expert service.
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Universal Group Trailer Leaf Spring Suspension - SP-221275

  • Leaf Springs
  • Springs
  • Double Eye Springs
  • 25-1/8 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. Includes bushings with 9/16" inner diameter.


  • 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


  • 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: 25-1/8"
  • 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

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-221 Universal Group Double Eye Trailer Leaf Spring - 4 Leaf - 3,000-lb Capacity

Customer Reviews

4-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/8" Long - SP-221275

Average Customer Rating:  4.8 out of 5 stars   (98 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. Includes bushings with 9/16" inner diameter.


They eye holes on the springs are not all round on the inside diameter, more oval shape which makes it difficult to get the bolts through when using the brass bushings. Also makes it impossible to grease the wet bolts like intended


We replaced the equalizers and the leaf springs at the same time. The leaf springs from were exactly the same as we could purchase locally and at a significantly reduced cost. Well done etrailer.


Springs worked fine and installation was not as hard as I imagined. Once my old springs were removed I found 2 that were broke. was great in helping me chose the correct springs for my 5th wheel and shipping was fast. I'll be back when I need anything else for my trailer.


While we haven't travelled with our 5th wheel yet since installation of our new springs and and the Lippert Never Fail Suspension Upgrade Kit, I am very pleased so far. All of the parts arrived in less than 24 hours from the time I placed my order and etrailer representative was very knowledgeable and helpful. Everything looks great.


The customer service was great when I called and it was shipped right away. I even got it sooner than estimated.


Well made great springs.

Absolutely no problems with these springs. Recommended Springs
Dave W - 08/23/2021


Seems like a well made product. I haven't hit any rough rail road crossings at full speed with it yet, but will try that next year I'm sure.


I have ordered from Etrailer multiple times now and I have been more than satisfied with the product and service each time. It’s my go to for trailer parts


Exact match to my old springs with an extra 1000lb total capacity for the four leaf packs.


I am rebuilding the springs on my toy hauler. I placed the order and 10 minutes later received an email stating that the ship date for one of the items was 4 months out.They gave me a substitute suggestion and a chance to modify the order. I wish everyone had this great service. I also ordered the wrong springs and was able to modify the order before it shipped-Great website!


Product was good


Just what I needed. Just hope the quality is good. Rime will tell on that one but fitment was spot on.


I am extremely satisfied with the service, and also the shipping of the products I ordered. I ordered 2 Axels and leaf springs and u bolts. All of it came fast and was exactly as shown on the website. I love the videos explaining products sets etrailier apart. I will use etrailier for all my trailer needs. And will recommend to all my friends. They even called me to verify my shipping address was right. I appreciate the A1 service.


Looks good, so far but haven't installed them yet? But very disappointed in the bolts that have been out of stock for the springs to attach to shackles


I ordered a leaf spring for my camper. Paid shipping for 4 to 7 day ship, you upgraded to 3 or 4 day for free and I received it in 2 days.
Exactly what I ordered, great product, and I'm camping earlier than I expected.
One very happy camper here.
Thanks for the great experience.


Items arrived extremely fast. Loved the tracking app. Would definitely recommend to someone else.


I installed these springs as part of an axle upgrade project. When I researched the axle on our 5th wheel I found that the manufacturer uses the same axle tube wall thickness on their 4400, 5200 and 6000 lb axles so I felt comfortable upgrading the axle end components. While I am not planning to overload the trailer, I upgraded the springs and components to 6000 lb. These springs work well and ride smooth with the upgraded equalizers.


Broken springs are inevitable with the roads the way they are. So are the rear jacks that seem to grab something to bend them. Coast to coast trips require spare parts. Etrailer is my goto guys. Always on time!


Very satisfied with everything.


They were delivered in a timely fashion. I have not yet installed them yet to confirm their operation. One steel plate on one spring was slightly misaligned but should be easy to remedy.


These replaced the springs on my 7X14 enclosed cargo trailer. The selection, price, and ease of ordering were awesome. They went on very easily and with the axle flip kit I also bought, I have about 4 inches of extra clearance. No more sagging and dragging. The only bad thing I can say is the springs are made in China. I prefer to buy American whenever I can.


Replacement springs were needed as the original right spring broke. Meghan M was extremely helpful in determining which springs , axle plates, u-bolts, and shackles were needed. Many thanks Meghan M. for the assistance in selecting the correct products.


I ordered springs, bushings , shackles, equalizer, and bolts from e-trailer for my rv tandem axle Chris helped me insure I had the correct parts and the correct quantity of parts. I put one on and everything went fine. The only problem was the galvanized coating on the shackles made the hole to small and had to be drilled. ETrailer has great videos to show you how it is done. The phone sales staff was knowledgeable and effective, and shipment was quick, and all parts were there.


The new springs, shackles and bolts for my 30 foot fifth wheel worked great. With help from etrailer I got the correct components and they're working much better than original equipment.


just what i wanted

Show More Reviews

See what our Experts say about this Universal Group Trailer Leaf Spring Suspension

  • How Tall is the Leaf Spring Stack for 4-Leaf Double-Eye Spring for 6,000-lb Trailer Axles SP-221275
    I went out to the warehouse and measured leaf spring # SP-221275 for you. The overall height including the bolt holding the stack together is 2-3/8 inches. Just the leaves by themselves are 1-9/16 inches tall.
    view full answer...
  • Leaf Spring Recommendation for 6,000 lb Trailer Axles
    The heaviest leaf spring available that will fit your current measurement is going to be rated for 6,000 lbs, the 4-Leaf Double-Eye Spring for 6,000-lb Trailer Axles # SP-221275. This spring is 25-1/8" long from eye to eye; you need to take into account that your current springs have elongated some so you'll want to go with something shorter. A leaf spring should not be rated for more weight than the trailer's capacity because it will give you a much stiffer ride. I've added a link to...
    view full answer...
  • Can Trailer Suspension have Different Capacity Springs on Either Side of Trailer
    You should definitely not put two different rated springs on opposite sides of a trailer. This will cause unpredictable suspension performance that would be dangerous to you and other motorists. You really need to match the spring rates on both sides of the trailer. I attached a link to a page that has all of the leaf springs we offer for you to check out. You can use the filters on the page to show results that match your axle capacity.
    view full answer...
  • Picking Out Replacement Leaf Springs for 1999 Fleetwood Prowler 26A
    Based on the axle capacity and dimensions of the current springs the correct replacement would be the # SP-221275.
    view full answer...
  • Replacement Leaf Springs for 2011 Eclipse Stellar Toy Hauler
    25-1/8 inch would be perfect as a leaf spring replacement for what you have. So since your axle is a 6k axle the part # SP-221275 would be a great solution
    view full answer...
  • Determining Correct Replacement Leaf Springs For 2002 Fleetwood Prowler Sit 26A
    I would be happy to help you find the correct replacement springs for your 2002 Fleetwood Prowler Sit 26A but you will need to verify the length of leaf spring your trailer uses, and the axle rating. You can find the axle rating by looking on the axle tag located on the center of the axle. If the tag is missing you can take the GVWR of the trailer and divide it by the number of axles on the trailer to get a rough idea. To find the length of the spring you will need to raise the axle off...
    view full answer...
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  • Is There Version of Trailer Leaf Spring SP-221275 with Inner Diameter 7/16
    No we do not have that option nor do we have a bushing that could replace what comes with the part # SP-221275 with the inner diameter you are requesting so your best option might be to source the bushing dimensions you need to use with this spring.
    view full answer...
  • Recommended Leaf Springs for a 2005 Fleetwood Terry Quantum
    To get the correct leaf spring, you will need a few things. The capacity is one of the most important, so with you already knowing you have 6,000 pound axles gets you halfway there. The other thing you will need to verify to make sure you are getting the correct ones will be the length of your current springs. The Universal Group # SP-221275 is designed for a 6,000 pound axle, but will measure 25 1/8 inches from eye to eye. If you current springs match this or are very close, they will...
    view full answer...
  • Does Number of Leafs of Trailer Leaf Springs Affect Ride Height
    If the leaf springs are mounted above the trailer axle then the number leaves would slightly affect the ride height of the trailer. If mounted below the axle it would not since the top leaf is what would contact the bottom of the axle and anything below it would not really matter.
    view full answer...
  • Picking Out Leaf Springs for 2000 Jayco Qwest Camper
    The info you'll need to pick out the correct leaf springs for your 2000 Jayco Qwest is the length of your current springs when unloaded and the axle capacity. With that info I can help pick you out what you need or you can check out the link I attached to see all of the springs we carry. For example, the part # SP-221275 is for a 6,000 lb axle and is 25-1/8 inches long.
    view full answer...
  • How to Determine Replacement Leaf Springs for 2007 Forest River Salem 5th Wheel
    The # SP-221275 leaf springs you'd looked at are designed for 6K capacity axles. In order to get an accurate measurement of your leaf springs, you'll need to put the 5th wheel up on jack stands so the axles hang freely. Then measure the center eye to center eye length of the existing springs. This is very important because leaf springs tend to flatten out over time. If you have tandem 6K axles, it's very possible that your leaf springs have flattened out by 5/8 of an inch. To confirm,...
    view full answer...
  • Replacement Leaf Spring for 5200 lb Axle
    A 5200 lb axle is actually a 6000 lb axle that's been de-rated by using a different outer bearing. The proper replacement leaf spring will depend on how long the original springs are. Because leaf springs flatten out and become longer as they wear out. To choose the proper replacement, you'll need to know if you have a double eye or a slipper spring. You'll also want to measure the springs by jacking the trailer so that the axles hang free. You'd then measure the center spring eye to center...
    view full answer...
  • Replacement Leaf Springs for a Trailer with Two 6,000 Pound Axles
    For 6,000 pound axles you will need springs that are rated for 3,000 pounds each. I recommend # SP-221275. This spring is 25-1/8 inches long, 1-3/4 inches wide, and has 4 leaves. It is best to replace all of the springs at the same time so they wear evenly and the ride quality/tire wear is not affected.
    view full answer...
  • How to Determine Axle Capacity to Pick Out Leaf Springs
    Can you measure the diameter of the axle? That will be a great way to get a ball park on the axle capacity. Typical Axle Diameters Based on Axle Capacity - 1,000-lb - 2,000-lb Axles: 1-1/2 inch - 1-3/4 inch diameter - 3,500-lb Axles: 2-3/8 inch diameter - 6,000-lb - 7,200-lb Axles: 3 inch diameter - 8,000-lb Axles: 3-1/2 inch diameter - 9,000-lb Axles: 4 inch diameter - 10,000-lb Or more axles: 5 inch diameter Most likely the leaf spring part # SP-221275 would be what you would need as...
    view full answer...
  • Replacement Leaf Springs For Tandem Trailer With 6,000-Lb Axles
    If you are bottoming out with your trailer it can be caused by a weak or broken suspension causing the problem. You want to check for all of the components for any signs of obvious damage. Since leaf springs may flatten out a bit over time you will need to measure the center-of-eye-to-center-of-eye to find the right leaf springs. This should be done when the spring is off the trailer or with the trailer raised so there is no weight on the spring. One of the double-eye leaf springs we...
    view full answer...
  • Is There Any Advantage to Using 6K Leaf Spring on 3500-lb Axle on Tandem Travel Trailer
    You would not like the ride quality with 6K-rated springs on the 3500-lb axles on your 2003 Dutchmen Lite travel trailer. In fact, since you (wisely) plan to replace all four leaf springs at once just having four new 3500-lb-rated springs will have the trailer suspension feeling stiffer than what you're accustomed to. The best way to go is to completely remove one of the springs so you can measure its eye-to-eye length without any tension on it. Do note that after years of use leaf springs...
    view full answer...
    Image 1 for
  • Replacement Leaf Springs for 2011 Crossroads Cruiser with 5200lb Lippert Axles
    The best way to determine which leaf springs will work as a replacement is by measuring the old springs from the eye center to eye center. For your 5200-lb Lippert axle, most of your options are going to be fairly close in length. Your axle has 2 potential replacement springs that are going to be fairly close in size, so you'll need to measure your old springs -they'll be a bit longer than they originally were since they'll flatten as they wear. You can use 4-Leaf Double Eye Spring for...
    view full answer...
  • Replacement 6,000 lb Axle Leaf Springs for 2002 Keystone Cougar
    3 inch diameter axles typically are 6,000 lb axles so the part # SP-221275 that you referenced would be the correct spring for that capacity. About what lenght do you need? The part # SP-221275 is shorter at 25-1/8 inches or if you need a longer spring in this capacity you'd want the part # SP-053275.
    view full answer...
  • Leaf Spring Recommendation for 2014 Columbus 5th Wheel with 6k Trailer Axles
    Picking out springs for a trailer is based on basically two things. The axle capacity of the trailer and the length/width. Since you provided all of that info we can easily help you figure out what you need. So dimensionally old springs tend to stretch a bit as they wear out so going with a spring that is slightly shorter than 25-1/4 inch would be what you'd need. For that the spring I'd recommend is the part # SP-221275. This is a 6k spring that measures 25-1/8 inches in length, and...
    view full answer...
  • Replacement Leaf Springs for Tandem Axle Trailer with 13,500 lb GVWR
    The 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/8" Long # SP-212275 is not what you are seeking because each spring is rated for 1,750 for the total axle capacity of 3,500 lbs. It won't be strong enough. You were right on the other parts because axle springs do stretch over time and are spread more when compressed. I recommend the 4-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/8" Long # SP-221275.
    view full answer...
  • Difference Between 5 Leaf and 4 Leaf Spring with Same Capacity
    The only difference between a 4 leaf spring like the # SP-221275 and a 5 leaf spring like the # SP-111275 is that the 4 leaf spring will use slightly thicker leaves and is 1/8 of an inch shorter. To get the best measurement of your existing springs, measure the center eye to center eye width with the trailer up on jack stands with the axles hanging free. Leaf springs should be replaced in pairs.
    view full answer...
  • Height Difference Between 4-Leaf and 5-Leaf 6,000lb Double-Eye Leaf Springs
    With both the 4-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/8" Long # SP-221275 and 5-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long # SP-111275 both being rated for 6,000lbs there won't be a noticeable difference in height. The 5-leaf just has softer leafs which will bend more giving it the same height as the 4-leaf.
    view full answer...
  • Replacing Leaf Spring PR4 with Spring Rated for 6k Axles
    The PR4 was a 3500 lb axle leaf spring which is our current part number # SP-212275. Since you axles are 6k you would need to step up to a higher rated spring like with the part # SP-221275 which is same length but for 6k axles.
    view full answer...
  • Replacement Leaf Springs For a 2015 Jayco Eagle 5TH Wheel Camper
    The 4-Leaf Double-Eye Spring # SP-221275 are rated for 3,000lbs per spring. To confirm that these are a correct fit for your 2015 Jayco Eagle 5th wheel you will want to confirm the spring measurements. A-12-9/16" B-13-5/16" C-25-1/8" D-3-1/8" I recommend replacing the U-Bolt with Nuts # 1755892 to reduce the chances of the original bolts having damaged threads or built up corrosion.
    view full answer...
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