Trailer Leaf Spring Suspension

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Universal Group

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Leaf Springs

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Springs

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Double Eye Springs

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25-1/8 Inch Long

4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/8" Long

4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/8" Long

Item # SP-212275

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Trailer Leaf Spring Suspension

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Trailer Leaf Spring Suspension SP-212275 - Double Eye Springs - Universal Group
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Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 3,500-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 3,500-lb Trailer Axles - 25-1/8" Long part number SP-212275 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (406)
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Universal Group Trailer Leaf Spring Suspension - SP-212275

  • Leaf Springs
  • Springs
  • Double Eye Springs
  • 25-1/8 Inch Long
  • 3500 lbs
  • Universal Group

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 3,500-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: 1,750 lbs
  • Axle capacity: 3,500 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: 5/16"
  • Number of leaves: 4
  • Additional dimensions: see table


Double-Eye Spring

Part NumberABCD
SP-21227512-9/16"13-3/16"25-1/8"3-1/4"


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-212 Universal Group Double Eye Trailer Leaf Spring - 4 Leaf - 1,750-lb Capacity

Replaces PR4B







Video of 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/8" Long


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




Video Transcript for Universal Group 4-Leaf Double-Eye Spring Installation

Today we're going to be taking a look at the Universal Group 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles. Part number is SP-212275. Now, these springs have been designed for use on a 3500 pound axle. You'll need one on this side, one on the other side of course. They support 1750 pounds a piece. Now, they're an inch and 3/4 wide.

From the center of each spring eye, from the center of this spring eye to the center of this spring eye, we're looking at 25 and 1/8 inches. You can see here a 4-deep spring pack. It's going to help to absorb a lot of that shock that we get going down the road as our trailer bounces around. You'll also see right here on the top, they do have the little button that sticks up that allows us to get our axle in the exact correct location, get it centered on that spring where it's going to be most effective. When we install our springs, the forward portion is going to mount directly to the U-bracket coming down off the trailer. We'll just install either new or existing hardware there.

We can bring the other side up, and it's going to be attached to the shackles. Now, if you've left your hubs on your axle, or if you're working with limited space, sometimes it's a good idea to get your axle put through before you put this side up. We might have to do that. We'll see when we get there. We'll do the same for the other one if you're using a tandem, or the other two if you've got a triple axle trailer. Now, I'm going to get my upper hardware tightened down.

The bolt in my spring purchase here, and also in that center bracket that drops down. Use a 21 on the actual bolt head, and 11/16ths here on the nut. We want to inaudible 00:02:03 the splines that round the nut into the bracket. Just a little bit to get it started, and then we can use a hammer to knock them on in. You can see that little gap there.

We're going to get rid of that. Then we'll tighten down the nut until it stops. That bolt has a stop point on it, so it's only going to get so tight because we still want to have movement here, but we want it to be nice and secure. Move onto the middle there, and it's going to be the same routine . All right. We'll get our axles in place. We've left these loose in case we need to drop the springs down for them to fit. Now with our axles in place, we can move on and get our shackle bolts, tighten them down. We'll just use the same process that we used on the upper bolts there. We're really just using this wrench to get the spline started. Then we can tap them through and tighten up the nut .. That's going to complete our installation of the Universal Group 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles, part number SP-212275.


Customer Reviews

4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/8" Long - SP-212275

Average Customer Rating:  4.9 out of 5 stars   (406 Customer Reviews)

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 3,500-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushings with 9/16" inner diameter.

- SP-212275
by:

I make my living with my 2008 cargo trailer. On the way to a job, my leaf springs broke on one side and as I nursed the trailer back home afterwards, the other side broke. I ordered all the parts needed from etrailer using their measuring guidelines to get the correct leaf springs and hardware. Having never replaced leaf springs before made me nervous but given the fact that etrailer's website is very comprehensive, I found the correct parts that I needed easily. My parts were delivered quickly and I had the old broken springs off and the new ones installed and was back on the road with only a couple days of down time. I'm very happy with etrailer and will recommended them again and again. 557850



- SP-212275
by:

Positive Experience I recommend etrailer. the price was better than I'd seen locally or online, although it happens that the size and type I needed was a particularly good deal. The service and shipping were surprisingly prompt, and when the box arrived, everything was as advertised. While replacing four leaf springs is about as much fun as shopping for socks, etrailer at least made ordering a positive experience. I actually found the video helpful as well. I've included a picture of what mine actually looked like. A breaker bar is a very handy tool. 5603


Comments

I have a question, Ive. Measured my springs to be 26. 14 to the center of each bolt, however the springs are nearly gone so can I safely say that my springs measurement should be 25 1/4?

-- comment by: DAVID D - 08/23/2013

1947

If there very old and have spent some time overloaded, they certainly could flatten and end up an inch longer than original. It may be helpful to take some of the other measurements on the the spring, and check the information on the axle to find its weight rating. That will make it significantly easier to find appropriate springs.

-- Patrick B - 8/24/2013


- SP-212275
by:

I found etrailer online when I searched for leaf springs for my landscape trailer. I am very pleased at the fast delivery and wide range of good quality trailer products and the helpful knowledge etrailer has on it's website. I replaced my leaf springs on my trailer. The new springs I ordered was a perfect fit. 641026



- SP-212275
by:

I bought springs, shackle bolts, and u-bolts and plates. Everything was great and fit perfectly. Only issue were the u bolts which were not galvanized. However, at a local trailer store, I bought galvanized U bolts for $4.50 each. For the DYIers, taking the old ones off took more than 4 hours for each side. My existing shackle bolts were so heavily rusted that I had to cut three off with a hack saw. Difficulty was confined space to operate hack saw with boat still on trailer. However, reassembling the new springs was less than 45 minutes each side. Must have tools are large diameter 3/4-13/16-7/8 deep sockets (6 point), 2 2 foot long breaker bars and a can of PB blaster. For safety: Good quality jack stands, minimum of 3--don't rely on the front trailer jack as it may roll. By the way, I did these myself and I am 64 years old. 668500



- SP-212275
by:

The springs have performed as.hoped and expected. The have been mounted almost one year. The trailer has been pulled to Wyoming and back to California. I have subjected the trailer to back-country rough dirt roads and some two-track. The trailer is about 1800 lbs and hauled about 800 lbs of cargo. So far so good. 351506


Comments

Great springs..Lots of miles and some rough roads NO issues at all...trailer is at 3260 pounds empty.

Pete W - 03/11/2018

35741

- SP-212275
by:

Looks like HD Quality. Easy install and perfect fit. I replaced all four on my tandem and it took about 30 minutes per side to install. Now getting the 25 year old original parts off the trailer frame and axles is a chapter in its self. I ordered the Never Fail bushings and hardware kit, u-bolt kit, along with new equalizers to go with the new springs. Good thing too because every thing was worn badly. The new parts gave me at least 2 more inches of space between the frame and the axles. The true test will be when I load it up with logs and hit the road. I added some pics to give you an idea of what I had before and 1 after. 277951



- SP-212275
by:

You get what you pay for. 1 out of 4 springs had eyelet ends that were not to spec. One bushing fell out. Another had to be reemed once installed. Getting sick of everything being made in China but I had no other choice. 569009



- SP-212275
by:

These are great springs for the price, the dealer wanted twice this much for the same springs, never going there again, word of advice though, MEASURE TWICE order once, my bad all day, I ordered the wong ones, my shackle straps were rotted off so I forgot to account for those, oh well, Etrailer has a fantastic return program, no questions asked and they had my springs to me in 2 days! 93245



- SP-212275
by:

These guys made ordering easy! No long drawn out questions. Shipping was fast and right. If I ever need anything of this nature again I will definitely use them again. 351973



- SP-212275
by:

The part was part of a repair on my trailer that broke a leaf spring and it fit perfectly. 634852



- SP-212275
by:

These leaf srpings were a perfect size replacement for replacing the suspension on my tandem axles boat trailer. My painted steel boat trailer had been exposed to saltwater, so the entire suspension was completely rusted & falling apart. Thanks to the great articles, videos, & documentation here on etrailer, I was able to find exactly what I needed to replace my all leaf springs & hardware, & which measurements to take to ensure I ordered the correct parts. Everything fit perfectly, & there was no need to make a run to a local auto parts store for forgotten parts, thanks to etrailer's articles & complete list of needed suspension components. Everything was a great price, shipped free, & delivered in 3 days. These guys/site is great, will def buy from again. A+++ 124130



- SP-212275
by:

Enjoyed everything about the experience. The product was what I thought was a really good price. The shipping cost was fair and shipped quickly and even increased but decreasing shipping time for no extra charge. Product was ready and easy to install 571817



- SP-212275
by:

Perfect fit, help articles gave me enough information to replace entire suspension system on my toyhauler with no previous expirience. Quick shipping, i will be repeat customer 379083



- SP-212275
by:

it was great I will tell my friends about the service thank you 726155



- SP-212275
by:

I have had my leaf spring for a year now and so far it is holding up nicely. Item was shipped quickly and was sold at a good price. 725964



- SP-212275
by:

Excellent experience. Easy to find the correct item and order it. Also at a good price and the delivery was timely. Will definitely use this store again. 724494



- SP-212275
by:

Thank you for your products and service 722823



- SP-212275
by:

Easy to install, and fit perfectly. Arrived on-time as promised. 719176



- SP-212275
by:

Both springs on my trailer were broken, could not believe it. Ordered a set from etrailer 3500 # and they arrived very quick. The springs are heavy duty and were a breeze to install 714337



- SP-212275
by:

Great product - fit perfect .....only thing I would like to see is "made in USA" instead of China stamped on it with huge letters. I would be willing to pay more 713437



- SP-212275
by:

Works well as an original equipment rep lacement. 714642



- SP-212275
by:

These springs are almost half of the lowest priced pair that i could find anywhere locally. Tractor supply has the exact ones for what i paid for the price of just one if i bought them from there. They are even from the same company that was on the label at the store. Very happy i didnt give up looking and went ETrailer!! 707709



- SP-212275
by:

Product came on time. All of the pieces were there. 714338



- SP-212275
by:

Bryan w worked with me to get what I needed, all parts were available and I received shipping information despite my order being made late in the afternoon. Arrived ahead of expectations. I'll be able to work on my trailer this weekend. Very pleased with the results this far! 713243



- SP-212275
by:

Hello, Tho i have not had them installed or even had a chance to open the box as yet, i am blown away how fast they arrived ! I placed an order yesterday and" WA-LA !" they appear probably much less than 24 hours later, its at my door step.. dude.. I will check out my order a little later when its not so hot to make sure i have what i need but pretty sure, theirs not going to be any problems either way...Thanks to Noah and Nicole and of course Etrailer.. 5***** 705125



- SP-212275
by:

Exactly what I needed. at a good price, delivered to my door for free. Thank you. 700106



- SP-212275
by:

Quality is good, and they come with nice bushings as well. Should keep them somewhat quiet going down the road. 699507



- SP-212275
by:

every thing fit as it should have, have had no issues with any of it. 700625



- SP-212275
by:

Good quality parts. Everything that I ordered and received was exactly as shone and fit perfectly. Customer service is outstanding. I would highly recomend etrailer to anyone repairing, or building a trailer. 692993



- SP-212275
by:

Nice springs, fit like a glove. Good price, free shipping on my order that arrived in less than 48 hrs. Well done! 691078



- SP-212275
by:

The springs fit perfectly. And weren't too bad to install. One thing to watch out for is that you do not pinch your brake wires beneath the u-bolt. Customer support was excellent with frequent updates and help handling a backordered part. Delivery was fast, I am very pleased. 690609



- SP-212275
by:

I just received my parts and started the work. Everything is good, correct, and at a good price. Thanks guys 691000



- SP-212275
by:

Great Service. Good Product. Improved the tow ability of my trailer. 686801



- SP-212275
by:

Some last a long time and some fail qui ckly. 683667



- SP-212275
by:

Hit and miss. Installed all new springs on our cattle trailer to find one of the front springs to break almost after installation. We replaced the spring with another identical spring and they seem to hold up well. 683662



- SP-212275
by:

Carol went above and beyond. She made the process of delivery easy ,with her outstanding effort and patience things worked out great. Thank you. I will be using you again.very happy 686894



- SP-212275
by:

A perfect replacement for my broken spr ing. 680417



- SP-212275
by:

Great product. I have bought two sets of springs. They are both fantastic and not one problem. And I do load it all the time. At least 3 times a week. 674493



- SP-212275
by:

Working good after a year and a couple thousand miles with the springs and shackles, on a travel trailer. 673567



- SP-212275
by:

Replaced as maintenance to a hard worked 10year old car hauler. My trailer has hauled many odds and ends across the country and these give a new piece of mind. Install was very easy, and they replaced the original springs perfect. 672879



- SP-212275
by:

Great springs, definitely recommend getting the bolts with grease zerts for longer life. 672303



- SP-212275
by:

I ordered these springs to replace the one that broke on our last camping trip. 2 day delivery was spot on, they arrived today as promised. I installed both springs and they fit just as they should. Very pleased with the springs and the delivery. 670753



- SP-212275
by:

Right rear leaf spring broke on my dual axle cargo trailer. I found a replacement spring on the app and watched the "how to" video on the e-trailer web site. Install went off without a problem. 670726



- SP-212275
by:

Didn't like to see made in China but everything worked out very good no complaints 669865



- SP-212275
by:

Springs fit well. Installation was way easier than expected. 666853



- SP-212275
by:

Have not installed it yet so I can't review the product. I can tell you that etrailer's customer service is top notch. I called about a shipping delay after I placed my order. They assured me it would only be a day and not a week like my order confirmation said. Called back the next day and my order was already shipped. Good people to do business with. 666615



- SP-212275
by:

I love this business! 664373



- SP-212275
by:

The four springs fit my RV trailer exactly like the original parts. I removed the non-greaseable plastic bushings and installed greaseable bronze bushings. The original springs had the bushing holes and bushings pounded out in less than 2,000 miles. The greaseable bushing kit is made by Morryde and cost a little under $100. Hopefully, replacing the plastic bushings will stop the wear. ( 3,500 pound axles, tandem axle RV trailer) 659941



- SP-212275
by:

On time, as priced as ordered. Good out fit. 659622



- SP-212275
by:

Great quality great price 658088


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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?


  • 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...
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  • Can Roadmaster Comfort Ride Shocks and Lippert Equa-Flex Fit on Freedom Express 246RKS
  • There would be a significant upgrade in the ride of your trailer if you were to install both the Roadmaster Comfort Ride Shock Absorbers # RM-2460 and the Equa-Flex Cushioned Equalizers # LC314336. If you had to choose between the two though I recommend going with the Comfort Ride Shock Absorbers as they will have the most impact on how your trailer handles. When it comes to replacing your leaf springs you want to stick with leaf springs that are rated for the weight of your axle. If...
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  • How to Raise the Height of a 5th Wheel Trailer Without Flipping the Axles
  • To gain height without flipping your axles I recommend doing 2 things: replacing your leaf springs with ones that have more leafs and changing out your hangers for taller ones. You can probably get away with just swapping out your hangers but unless you only have something like 2 or 3 leaf springs and you want to gain height you would have to go with at least 4 or 5 leafs to gain enough height. When replacing leaf springs be sure to choose new ones that have a weight rating that matches...
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  • Upgrading Leaf Springs on a Trailer with a 3500 Pound Axle
  • If you are wanting to go to higher capacity leaf springs I would advise against it. The problem is that since the trailer axle is rated for 3,500 pounds you won't gain any additional capacity by switching to higher capacity springs. What it will do is not allow the suspension to compress as much leading to a very stiff and jarring ride for the trailer and anything in it. Another problem is that alternate springs may not have the correct measurements and that would mean that the spring...
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  • Hangers to Use with Leaf Spring SP-212275
  • The spring you ordered # SP-212275 would work well with the hangers # 115917 and # 30-20 with shackle straps # TRSL350. These parts are very similar to what comes with the # APS1 which is what is recommended with the springs you ordered. Only thing else you might need is the shackle bolt part # 166081. The distance between the hangers would need to be 24-7/8 inches.
    view full answer...

  • Alternative to Leaf Spring Spacers to Lift Trailer
  • Although we do not have spacer blocks of that dimension we have an option for you that will allow you to lift your trailer with what is called an over/under conversion kit. This moves your trailer's leaf springs to the top of your axle and lifts your trailer approximately the same amount as your axle's diameter plus the height of the leaf spring pack (please keep in mind this conversion kit is for use with double-eye springs only). The accompanying photo a customer sent in shows the...
    view full answer...

  • Replacement Hanger Kit, Leaf Springs, Brake Assemblies and Drums for Triple Axle 3,500 lb Axles
  • We have ways to help you find out what you need but you'll have to do some measuring to determine exactly what your trailer needs. Judging by what you listed it looks like you have a triple axle setup that uses 3,500 lb axles. So lets first start with leaf springs. For that you'd want the 3,500 lb springs part # SP-212275 which matches the length of what you have now and the capacity. The Dexter Suspension Kit part # K71-360-00 you referenced would then work well with this. So now for...
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  • Replacement Axles and Leaf Springs for Tandem Axle Trailer
  • It is possible the Dexter Trailer Axle Beam with E-Z Lube Spindles # 7359765 will work for you, so long as your current axles are rated for 3,500 lbs, have a hub-face to hub-face length of 95" and spring center to spring center length of 80"; you can use the diagram I have added to know where you need to measure. Additionally, because this has EZ Lube spindles you will need to add Grease Caps # RG04-040 to make your Hub and Drum Assemblies # 84556UC3 compatible. As for your leaf...
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  • How to Determine Correct Replacement Double-Eye Leaf Springs for EZ-Loader Boat Trailer
  • It is tough to determine the actual length of a double-eye leaf spring when it is still installed in the boat trailer's suspension; it is tougher still if the weight of the boat is on the suspension. In fact, when a leaf spring is old and well-worn, it can actually stretch or elongate slightly, meaning that if you pulled it completely out of the suspension and measured its eye-to-eye length the measurement you get could actually be longer than when that spring was brand new! We are usually...
    view full answer...

  • Help Picking Out Replacement Trailer Leaf Spring for Spring that Measures 26 inches Long With Load
  • I need two things to help you pick out the correct leaf springs for your trailer. I need to know the axle capacity of your trailer as well as the length from eye to eye without a load on your trailer. With those two pieces of info I can help you pick out the correct springs. A likely candidate for what you need is the part # SP-212275 which is for the very popular axle capacity of 3,500 lb and is 25-1/8 inches long. This would be about the right length when your spring doesn't have a...
    view full answer...

  • Trailer Leaf Springs, Hangers, and U-bolts for a 3,500 Pound Axle
  • It does appear that the hanger in the picture has been overloaded or otherwise damaged so replacing them is a good idea. And like you said, since it has to be replaced anyway you could switch to double-eye springs which are more common so parts for them are easier to find. The springs do not have to be the same length but having it close means you won't have to do any math to ensure everything is in the best location for the trailer size and weight. You can use hanger kit # APS4 which...
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  • 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.
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  • Trailer Suspension Kit and Leaf Springs Recommendation for a Tandem Axle Boat Trailer 4,600 lbs
  • As long as you are replacing everything (hangers, springs, hardware, equalizer), then yes, you can use our trailer suspension kit, # APT5. In fact, this is the kit that I recommend for your trailer. The hangers must be welded to the trailer. The holes that you see in the top of the hangers are actually for welding, not bolt holes. For the leaf springs, you will be much happier with the ride quality of part # SP-212275 for 3,500 lb axles. The other springs you referenced are for 5,000...
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  • Recommended Axles for Two Trailer Builds with 14K Capacity & 7K Capacity
  • For your trailers, I recommend not using a steering axle because there are different requirements for them and your trailers don't need them. If you want to pursue the steering axle you will need to check with your local DMV for requirements. My recommendation is to use a single or tandem axle application for each trailer. If you want to use a single axle for your 7K trailer, I recommend the Timbren Axle-Less Trailer Suspension System - Spindle w/ Brake Flange - Regular Tires - 7K...
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  • Can Heavier Leaf Springs Be Substituted to Offset Weight of Multiple 5th Wheel Slide-Outs
  • Your concern with uneven tire wear and suspension sag from the weight of your toy hauler's 4 slide-outs can be addressed by installing stiffer springs on that one side of the trailer. I confirmed with my technical contact at Grand Design that this is permissible and that other owners have done the same. You will want to select springs of the appropriate eye-to-eye length to match your OEM springs and of a weight rating that is not too much higher than the OEM springs. My contact recommended...
    view full answer...

  • Can 4-Leaf Springs be Replaced with 5-Leaf Springs on 2016 Grand Design RV?
  • We can certainly help you replace your leaf springs, but your 2016 Grand Design Reflection 29RS, has Lippert 3,500 LB tandem axles, and unfortunately there are no 5-leaf springs available which meet that capacity. To find proper replacements, you will need to know the length of the springs from the center of one eye to the center of the other eye. If that measurement is 25-1/8 inches, you will want the 4-Leaf Double-Eye, # SP-212275. If the eye-to-eye measurement is 27 inches, you need...
    view full answer...

  • Shackle Bolt Recommendation for 1-3/4 inch Wide Trailer Leaf Spring
  • The most popular shackle bolt to use with a spring like the part # SP-212275 that matches the descripton you listed is the part # 126B2 which is the correct size and has a zerk fitting so that you can easily grease the bolt if needed. The overall length of the bolt is 3-5/8 inch, the usable length is 3 inch, and the diameter is 9/16 inch which is the most common size.
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  • Installing Leaf Springs on Single Axle Trailer
  • For a single axle trailer, you want the shackle strap to be able to move so that you have the spring deflection needed for your suspension. Angled like the photo or even almost vertical is fine you just don't want the shackle strap to bind and have issue as you go over bumps. If it is completely vertical or angled back toward the axle, then your leaf spring is not long enough and your suspension components will not move as intended giving you a rough ride at best and at worst failure...
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  • Correct Hanger Spacing Using Triple-Axle Hanger Kit With 3,500 Lb 25-1/8 Inch Long Leaf Springs
  • The correct hanger spacer when using the Triple-Axle Trailer Hanger Kit part # APTT5 with the 4-Leaf Double-Eye Spring part # SP-212275 is 29-1/2" from the front hanger to the center hanger, 34" between the center hangers, and 29-1/2" from the second center hanger to the rear hanger. Please note, you will also need the U-Bolt Kit for Mounting Kit part # APUBR-1 in order to mount the leaf springs to the axle.
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  • Recommendation for Over Under Kit to Flip the Trailer Axle Under the Leaf Springs and Raise Trailer
  • When you flip your axles using the Dexter Trailer Springs Over-Under Conversion Kit # K71-385-00 for 3 inch axles or # K71-384-00 for 2-3/8 inch axles, the other measurements do not change. You simply gain the height of the axle diameter plus the leaf spring stacked spring height at the axle. All of your springs, shackle straps, and hangers stay the exact same. If you choose to replace those parts, you will want to replace them with the same length and capacity parts. I see you...
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  • Are 10 Inch Trailer Wheels Compatible with Electric Brakes for Tandem Axle Trailer Build?
  • The Kenda 205/65-10 Bias Trailer Tire with 10" Galvanized Wheel - 5 on 4-1/2 - Load Range E # AM3H490 is rated for a maximum load of 1650 lbs at 90 psi, so 3,300 lbs per axle. It however is only compatible with 7 inch brake assemblies and we do not have any axles that have that brake flange until you move up to 3,500 lb axles and then your brake hubs that fit those spindles will only work with 12 inch wheels or larger and 10 inch brake hubs. My recommendation for you is to use the...
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  • How To Measure Leaf Springs For Replacement On 2001 Cougar Fifth Wheel
  • I am happy to help you figure out which springs you need for the 2001 Cougar 5th wheel however trailer manufacturers do not make the spring length information readily available so I cannot tell you what the spring length is. To pick out a replacement spring you want to measure the length of your spring without any weight on it center of spring eye to center of other spring eye. For example: the 4-leaf double-eye spring part # SP-212275 measures 25-1/8" spring eye to spring eye. You also...
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  • Will the Lippert Never Fail Bushings Part # LC279684 Fit the 4-Leaf Spring Part # SP-212275
  • Yes, the 4-Leaf Double-Eye Spring part # SP-212275 come with the nylon bushing which are inserted into the eyelet hole of each opening. The Never Fail Bushings part # LC279684 that you reference are not made of metal but instead a modified polyamide. The modified polyamide will last much longer than than standard nylon bushing and are also self-lubricating. They will work with the above leaf springs and the Curved Equalizer part # TREQ356.
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  • Leaf Spring Recommendation for 3,500 lb Axle on Trailer for Converting from Slipper to Double Eye
  • Sounds like you are trying to convert your trailer from slipper springs to double-eye springs. This is possible but will require you to install new rear hangers for the rear eye of the spring to attach. You would need to go with a leaf spring that is rated for the weight of your trailer when it is loaded an ready to go. The closest leaf spring we have in terms of dimensions that is for a 3,500 lb axle is the part # SP-210275. This spring is 27 inches long. For the price an convenience...
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  • Picking Out Trailer Leaf Spring for 3,500 lb Axle to Replace Spring that is 25-1/2 inches Long
  • So over time a trailer leaf spring will stretch out slightly as it tends to flatten out. This means that when you measure your old springs you want to typically go with a new spring that's just slightly shorter to accommodate this. So if you have a 3,500 lb axle and your leaf spring is currently 25-1/2 inches long from spring eye to spring eye then the part # SP-212275 that you referenced would be perfect as it is 25-1/8 inches.
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  • Troubleshooting Equalizers Tilted in Opposite Direction on Both Sides of Trailer
  • If you are sure that the trailer is on level ground then there is most likely an issue with the suspension setup that's causing the equalizers to tilt in opposite directions on both sides of the trailer. I recommend making sure that the axle is square to the trailer frame. To check this what you can do is take a measurement from each end of the axle up to the coupler. You want these 2 measurements to match but if you find they're different then the axle needs to be repositioned. You...
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  • Replacement Leaf Spring Options for 3,500 Pound Trailer Axles
  • To determine the correct replacement spring you will need to go by the measurements of the existing springs. This is best done with the weight off of the spring you are measuring either by removing it or by jacking up one side of the trailer. We have replacements that are rated for 3,500 pound axles. All of the springs on the trailer should be replaced at the same time so that the trailer doesn't have some good springs and some worn out ones. That could lead to poor ride quality and...
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  • Can the Capacity of a Trailer be Increased by Upgrading the Axle?
  • Since your trailer currently has a 3,500 lb axle, the restriction of 2,990 lbs max capacity must be due to another component on your trailer that doesn't have the that high of a capacity. This could be your coupler, leaf springs, wheels, tires, or the frame itself. If the frame itself is rated the lowest, then your capacity cannot be increased, but any of the other components does give that ability to increase weight capacity. The weight capacities should be listed on the individual...
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Info for this part was:

Expert Research:
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Victoria B
Video Edited:
Jacob T
Video by:
Kathleen M
Installed by:
Cole B
Installed by:
Randy B
Written by:
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