1. Trailer Leaf Spring Suspension
  2. TruRyde
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  5. Round Axle - 3 Inch
Spring Seat for Typical 5,200-lb to 7,200-lb, Round Trailer Axles with 3" Diameter

Spring Seat for Typical 5,200-lb to 7,200-lb, Round Trailer Axles with 3" Diameter

Item # TRSS300
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Trailer Leaf Spring Suspension
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TRSS300 - Round Axle - 3 Inch TruRyde Axle Mounting Hardware
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The spring seat is a necessary component of your trailer's suspension system. When mounted with 1-3/4" or 2" wide leaf springs, it adds extra support and provides proper positioning for the axle. Lowest Prices for the best trailer leaf spring suspension from TruRyde. Spring Seat for Typical 5,200-lb to 7,200-lb, Round Trailer Axles with 3" Diameter part number TRSS300 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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TruRyde Trailer Leaf Spring Suspension - TRSS300

  • Spring Seats
  • Axle Mounting Hardware
  • Round Axle - 3 Inch
  • TruRyde

The spring seat is a necessary component of your trailer's suspension system. When mounted with 1-3/4" or 2" wide leaf springs, it adds extra support and provides proper positioning for the axle.


Features:

  • Welds onto round, 3" diameter axle (typical 5,200-lb to 7,200-lb axle)
  • Works with 1-3/4" or 2" wide spring
    • Cutout on flat side of seat surrounds raised knob on leaf spring to prevent turning or shifting
  • Provides extra support and secure positioning for trailer axle
    • Please note: 2 spring seats are required for each axle


Dimensions

SS-300 TruRyde Spring Seat - 3" Round Axle

Replaces 3-42 Spring Seat - 3" Round Axle





Video of Spring Seat for Typical 5,200-lb to 7,200-lb, Round Trailer Axles with 3" Diameter

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




Video Transcript for TruRyde Trailer Suspension TRSS300 Review


Customer Reviews

Spring Seat for Typical 5,200-lb to 7,200-lb, Round Trailer Axles with 3" Diameter - TRSS300

Average Customer Rating:  4.9 out of 5 stars   (78 Customer Reviews)

The spring seat is a necessary component of your trailer's suspension system. When mounted with 1-3/4" or 2" wide leaf springs, it adds extra support and provides proper positioning for the axle.

- TRSS300
by:

Products were as advertised, worked well and installation went as planned. Accomplished task - moved under hung leaf springs to over axle (tandem drop) on older horse trailer, to regain bumper clearance - new truck sits higher than old, also allowed extended goose neck to eliminate tail gate damage, while leveling trailer (nose no longer stuck in air). I would purchase again without hesitation.


Comments
Works as expected, Im happy with the product and results- would purchase again if I have a trailer in the future that needs a lift.
James K - 07/29/2021


- TRSS300
by:

I replaced my leaf springs, drums, brakes and added the Dexter E-Z Suspension kit to my Keystone Cougar Fifth Wheel trailer last year. This was my first time working with etrailer and I can’t say enough about how well it all went from the ordering to the install. Tammie P did a amazing job with knowing what parts would work best on my trailer. Tammie also gave me updates on my deliveries that I appreciated. I had a trip planned short after I received my parts. So having someone at their end checking on arrival dates helped. In the future I will definitely use etrailer for all my trailer needs. Thanks again for all the help! Great Team....



- TRSS300
by:

Perfect fit as described! Uploaded picture for proof. So far i couldent be happier with etrailer.com, great prices and fast shiping. I haven't had an issue with anything so i have no opinion as far as customer service goes. I would definitely recommend to a friend.



- TRSS300
by:

worked perfect for my application. I used this on my 1955 Willys truck axle.



- TRSS300
by:

Great product and great company to work with. I ordered regular shipping and they upgraded me to 3 day shipping an no charge. Very satisfied with the product and company.



- TRSS300
by:

Worked Great!



- TRSS300
by:

I recently started an new business and have purchased multiple products from etrailer.com over the last couple of months. I have been very happy with the ease of ordering and product quality. I initially ordered from several suppliers and have now starter ordering from etrailer.com only. They have the best pricing on the parts I purchase and am very happy with them!



- TRSS300
by:

Although I just bought a rather small item, the service was great, the person I talked with was friendly & helpful, and was shipped on time. We welded the spring seat bracket on the day we got them! I was very pleased, and will hopefully shop here again, and tell others about your website. Thanks!



- TRSS300
by:

Wurked as designed.



- TRSS300
by:

the bracket helped raise the trailer 5 1/2" allowing for more clearance going in and out of parking lots but mainly off road into the mountains. Working alone the project took maybe 4 hours.



- TRSS300
by:

Fast shipping and great products. Only thing that would have been better was if it all would have been made in America.


Comments
So far so good
chris p - 07/09/2017



- TRSS300
by:

I installed a set of these spring mount brackets one year ago and I am glad I purchased it from etrailer. I purchased it on line just to make sure it would work on the 1964 axle that I was going to weld it to in order to complete the install of a new set of springs that I also purchased from etrailer. Everything fit perfectly and etrailer is now my go to for all my trailer needs. George J. was very professional and knew the product(s) would work. And it did! Thank you George and etrailer.



- TRSS300
by:

Product was exactly as described. Used the info on website for location of mounts. Couldnt be happier. Awesome customer service as well.



- TRSS300
by:

what i needed for special project; narrow perch for 1935 dodge dropped axle. i needed something i could modify for my project. received quickly and im happy, thanks


Comments
part still working. very happy
ROBERT M - 03/04/2019



- TRSS300
by:

The seats were just what I needed Last year I moved the trailer springs from the bottom of the axel to the top when I did I had to turn the axel end to end it caused the trailer to wear tires out . brakes to wear out .I am turning axel back and welding new seats leaving hubs running right. Back to factory only on top of axel. Thank You



- TRSS300
by:

I ordered a very simple product from etrailer.When they said it woul be there it was.The product was better then what the picture showed.I recommend this company to anyone.THANKYOU



- TRSS300
by:

Working great after welded onto the axle. No problems 1 year later.



- TRSS300
by:

I used these to flip the axles on my 2005 Weekend Warrior FS3000 30 ft toy hauler. This was by far the best price around and they worked well for my application. I did have to hit them with a grinder to clean up some burrs so they would sit flush but other than that they are great.



- TRSS300
by:

got the job done.



- TRSS300
by:

I had ordered some parts online to rebuild the suspension on one of our trailers. Customer service called me a short time later to inform me that they were out of stock on some items, they asked if it was possible to substitute some items. She was able to find the exact parts I needed in a different kit. The parts came within 3 days, very well packed, and they fit perfectly! This is the 3rd time I've ordered from etrailer and they have exceeded my expectations every time. EXCELLENT customer service and quality parts.



- TRSS300
by:

I am using two second hand axles for my trailer and the spring seats were in the wrong place. They were hard to find because I didn't know what to call them, but I was really grateful they were available. They will complete the installation of the axles and are sturdy and cut perfectly.



- TRSS300
by:

Perfect fit



- TRSS300
by:

rate the product great, because of the price and availability, was shipped fast, faster then I needed. These perches can go for as much as 7 times the price at trailer supply place in town. The bad the shipping was a bit steep, flat rate could have been a lot cheaper.



- TRSS300
by:

I bought these to swap my axles to the top of my springs. They were an affordable option as compared to my local trailer store.



- TRSS300
by:

How can you beat this service ! the folk's at etrailer not only had the best price but my order showed up much sooner than what I was expecting . That relay make the local parts store look bad.


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Show More Reviews

Ask the Experts about this TruRyde Trailer Leaf Spring Suspension

  • How to Raise the Height of a 5th Wheel Trailer with 3 Inch Diameter Axles
    I do have options for you but we do not have spring seats that would raise the height of your trailer. The spring seat we have for a 3" diameter axle is part # TRSS300 which is standard height. With that being said, a taller spring seat will only raise the height of a trailer if the leaf spring is above the trailers axle. If the leaf spring is below the trailers axle then a taller spring seat would actually lower the height of your trailer. Using taller spring seats are never recommended...
    view full answer...
  • What Are The Dimensions Of The Axle Spring Seat for 3 Inch Round Trailer Axles
    The Dimensions of the Axle Spring Seat 3 inch Round, item # TRSS300, are 1-7/8 inches wide by 4 inches long. The radius, where the 3 inch axle sits, is on center and the 1/2 inch hole is centered in the part.
    view full answer...
  • Replacement 5,200 lb Axle That is 86-1/2 Inches From Hub Face to Hub Face
    While we have an option for you, there isn't a 5,200 lb axle we offer that measures both 86-1/2 inches hub face to hub face and 68-1/2 inches spring center to spring center. So what you can do is get an axle with an 86-1/2 inch hub face measurement and weld on new spring seats at the 68-1/2 inch measurement you need. The correct parts for that are the following: - Dexter Trailer Axle Beam with E-Z Lube Spindles - 86-1/2" Long - 5,200 lbs # 8327816 - Spring Seat for Typical 5,200-lb...
    view full answer...
  • How to Pick Out Spring Seats for an Axle that is Getting Moved Flipped
    To determine the correct spring seat will depend on the axle diameter and capacity. For example the Spring Seat part # TRSS300 that you referenced is designed for 3 inch axles with 5,200-7,000 lb capacities. If you need a different spring seat check out the link I attached that will show you all of the spring seats we offer.
    view full answer...
  • Leaf Spring Seats for a 5,200 to 7,000 Pound Trailer Axle
    A 5,200 to 7,000 pound trailer axle will be 3 inches in diameter if it is a round axle. For that you can use spring seat # TRSS300. It is sold in quantities of 1.
    view full answer...
  • What is a Trailer Spring Seat
    A leaf spring seat, or perch as it sometimes called, is the mount that is welded to the axle where the trailer's leaf springs sit on top of or below the axle. An example of one is part # TRSS300. I've attached a picture that points out the spring seat on a trailer axle.
    view full answer...
    Image 1 for
  • Replacement of Lippert 5200lb Axle, Electric Drum Brakes, and Hub and Drum Assembly
    Since time is a factor and we do not have the complete axle brake and hub set up, Item # 8327816-EB, in stock (August 2021). I recommend the Dexter Trailer Axle with E-Z Lube Spindles item # 8327816. This axle is 86-1/2" Long with a 5,200 lbs capacity that will replace your Lippert axle. The TruRyde spring seats item # TRSS300 will work well with these axles. Unless your trailer hubs are brand new you should replace both of them and keep the passenger side one around as a spare. I recommend...
    view full answer...
  • Looking For Replacement Trailer Axles With 70 Inch Spring Center and 85 Inch Hub Face Spacing
    We carry a Dexter 6K axle that comes very close to the measurements you specified. The # 8327826-EB has an 86-1/2 inch hub face to hub face dimension, which means it would only be 3/4 of an inch longer on each side which should still work well for you. The spring seats are 71-1/2 inches apart, but they could easily be removed and new ones could be tacked in place using part # TRSS300 which are sold individually. The # 8327826-EB comes complete with electric brake assemblies and a hub/drum...
    view full answer...
  • Should Spring Seats be Welded to Trailer Axle
    Yes, you need to weld the spring seats # TRSS300 to the axles # 8327834 that you referenced.
    view full answer...
  • Recommended Axle To Replace Older AL-KO 4400lb Axle # 402268
    I have a replacement axle option for you, but based on the information I was able to find on your AL-KO 4400lb Axle # 402268 it uses an older style of braking assembly that was discontinued when AL-KO was bought out by Dexter. If the brakes on your trailer are unusable the only option is going to be to go ahead and replace the axle to one that uses modern braking assemblies. Since we do not have any 4400lb axles, I recommend using 5200lb axles as a replacement. We offer the Dexter...
    view full answer...
    Image 1 for
  • Bearings, Grease Seals, Hub/Drums and Hydraulic Brake Assemblies for Dexter 5200 lb # 6340624 Axle
    The wire shown is for the brake magnets if electric brakes are used. The spindles are compatible with a 25580 inner bearing with a 1.75 inch inner diameter and a LM67048 outer bearing with a 1.25 inch inner diameter. The grease seals used would be dependent on the hub, but the surface of the spindle that the seal would ride against is 2.225 inches in diameter. The axles would be compatible with a hydraulic 12 x 2 inch brake assembly like # 23-324-325 and a # 8-201-5UC3-EZ hub/drum...
    view full answer...
  • Replacement Axle for Lippert 5200 that is 86.5 inches Long
    From your axle tag I can tell you have a 5,200 lb trailer axle that has 86.5 inches from hub face to hub face, 68.5 inches from spring seat center to spring seat center and comes with hubs that have a 6 on 5-1/2 inch bolt pattern. While we have axles like the part # 8327816-EB that are the right length, capacity, and come with correct bolt pattern hubs the spring seats aren't lined up perfectly so they would need to be moved. You could just have new spring seats welded on with part # TRSS300.
    view full answer...
  • Can Spring Seats on Dexter 3500 lb Axle 35545E-ST-EZ-89 Be Relocated
    The Dexter # 35545E-ST-EZ-89 axle would work very well for you, as it's definitely the closest to what you currently have. Once the existing spring seats were removed, they'd likely be pretty messed up. You'd be better off simply purchasing new ones, part # TRSS238 and welding them into place where needed. You could go larger in weight capacity, up to a 5200 lb axle like # 8327820-EB, but if your current axles are 3.5K apiece, increasing the capacity of the axles won't increase the trailer's...
    view full answer...
  • Determining Correct Axle Upgrade For 2018 Grand Design Imagine Travel Trailer
    I would be happy to make a recommendation for upgraded axles and suspension components for your 2018 Grand Design Imagine 2670MK, but first I will need a few measurements from your current components. Starting with the axle you will need to measure your current axles from hub face to hub face and from spring center to spring center to determine the correct length the replacement axle would need to be. For example the Dexter Trailer Axle Beam with E-Z Lube Spindles - 89" Long - 5,200...
    view full answer...
    Image 1 for
  • Can Spring Seats on Dexter Replacement 5200LB Axle Be Installed Atop the Axle Rather Than Underneath
    You certainly can install a replacement 5.2K axle like # 6340624 by using new spring seats atop the axle. I'd recommend using part # TRSS300 but it's recommended that they at least be tacked into place so they stay put.
    view full answer...
  • Could Spring Seat of Dexter Axle be Moved to Fit New Application
    The Dexter axle part # 8327820 could only fit your trailer if you installed new spring seats on it since it has spring seat centers at 74 inches and your trailer has them at 71.5. For new spring seats you'd want the # TRSS300 welded at the correct distance. Aside from that the overall length and capacity would be fine for your trailer.
    view full answer...
    Image 1 for
  • Can Axle Be Ordered with Loose Spring Seat Perches?
    The Dexter Trailer Axle Beam with E-Z Lube Spindles - 89" Long - 6,000 lbs # 8327830 comes with the spring seats (perches) welded in place and they cannot be ordered without them attached. However, you can add spring seats if you need them in a location other than the 74 inches on center. You would use the Spring Seat for Typical 5,200-lb to 7,200-lb, Round Trailer Axles with 3" Diameter # TRSS300 and you'd need to weld them in place and then prime and paint them for corrosion resistance....
    view full answer...
    Image 1 for Image 2 for
  • Continuous Trailer Bearing Failures On Single Wheel
    I am sorry to hear about all the issues you are having with your trailer. Based on what you described, I would lean towards an issue with the spindle rather than the weight capacity of the hubs. The reason being that if your hubs were truly underrated, you would most likely have issues with all of them not just the same spindle. The damage to your spindle is likely not noticeable however, it only takes a small degree off center to cause problems. If the angle at which the spindle lies in...
    view full answer...
  • Recommended Spring Seat for a Square Axle Tube
    Correct, you will need to have a spring set installed on the axle tube to hold the leaf springs in place and prevent them from sliding back and forth. That said, although we do not have any spring seats specifically for a square tube axle you can use the Spring Seat part # TRSS300 by grinding the ends down and then welding it to the axle tube.
    view full answer...
  • Replacement Trailer Suspension Components
    In a typical leaf spring trailer suspension a spring seat like # TRSS300 is welded to the axle but the u-bolt plate is not. The u-bolt plates are bolted around the axle and leaf spring and these hold the spring in place on the spring seat and to the axle, as noted on your photo. You can also refer to the linked article on slipper spring suspensions for more on the details of how these parts work together and on how to measure. You'll want to completely remove one spring from the suspension...
    view full answer...
    Image 1 for
  • Can the Lippert Trailer Shock Kit be Used with the Dexter Over-Under Conversion Kit?
    The Lippert Components Bolt-On Shock Kit w/ Heavy Duty Gas Shocks - 3,500-lb (2-3/8") Axle # LC281255 is compatible with the Dexter Trailer Springs Over-Under Conversion Kit # K71-384-00. This over-under kit If you have 3 inch axles ( lbs) then you will use # K71-385-00 and # LC281281. The over-under kit will give you the spring seat locations needed but will give you parts that the Lippert shock kit will duplicate. If you want to weld on spring seats, you can use # TRSS300 or...
    view full answer...
    Image 1 for
  • Replacing Lippert 5,200 lb Axle with Dexter 5,200 lb Axle 86.5 Inches Hub Face to Hub Face
    The Lippert 5,200 lb axle you have has a hub face to hub face of 86.5 inches which is identical to the Dexter # 8327816 you referenced, however the 68.5 inch spring seats of your Lippert axle are not identical to the 71.5 inch spring centers of the Dexter axle. They do use the same spindles so the bearings and grease seal will all match. You would simply need to weld spring seats onto the axle at the 68.5 inch on center locations using # TRSS300.
    view full answer...
  • 86-1/2 Inch Long Trailer Axle Rated for 5,200 lbs
    We do not have a trailer axle beam with those exact specs. The closest we have is the Dexter Trailer Axle w/ Electric Brakes - E-Z Lube - 6 on 5-1/2 Bolt Pattern - 86-1/2" - 5.2K # 8327816-EB which is 86-1/2 inches hub-face to hub-face but 71-1/2 inches spring-center to spring-center. You could have new spring seats welded onto this one with the Spring Seat for Typical 5,200-lb to 7,200-lb, Round Trailer Axles with 3" Diameter # TRSS300.
    view full answer...
  • Lippert Part 176502 Axle Replacement Options With Hub/Drums and Brake Assemblies
    Thanks for including the product number and photo of the sticker. Your axle actually has a hub face to hub face of 95.5 inches and spring centers at 74.5 inches with a 4,400 lb capacity. This isn't a direct replacement so you have a couple of options. You can either upgrade to a larger axle and weld spring seats in the correct locations or you can use an axle-less system. The Dexter Trailer Axle w/ Electric Brakes - E-Z Lube - 6 on 5-1/2 Bolt Pattern - 95" - 5,200 lbs # 6340624-EB...
    view full answer...
    Image 1 for Image 2 for
  • Changing 3,500 Pound Trailer Axles to 5,200 Pound Axles
    The first thing to consider is if the axle(s) are actually bent. Trailer axles have a bow in them so they are higher at the center than at the ends. When under load the axles straighten out some. That is part of how they get their capacities. If the axles are bent from damage then that is another story. Like you said the 5,200 pound axles that we have include spring seats that are on the bottoms of the axles. In order to have the spring stacks on top of the axles all you would need...
    view full answer...
  • Parts Needed to Replace Leaf Springs, Shackles and Hangers on a Tandem Axle Trailer with 3 Inch Axle
    The # SP-218275 springs are not designed for use with a 3 inch Dexter axle. A 3 inch axle is rated for at least 6,000 pounds so you would need to go with the # SP-198275, 6-Leaf Double-Eye Spring. The # SP-198275 spring has a 24-7/8 inch length and will have the same axle spacing, 34 inches, as the # SP-218275 spring that you referred to. You should check your current axle spacing or wheel and tire size to be sure the 34 inch spacing will provide clearance to mount the tires on your...
    view full answer...
  • Upgrading Underrated Axles on 31-4BH Coleman Lantern Travel Trailer
    If I'm reading you correctly, your travel trailer has a GVWR of 10K, but has two 3500 axles? If that's the case, your axles are horrifically overloaded and should be upgraded. Installing 12 inch brake assemblies (which likely wouldn't work because the available 12 inch drums would use a different bearing set than a 3500 lb axle) would provide better braking, but wouldn't fix the fact that the axles are underrated. Your best course of action would be to replace your current axles with...
    view full answer...
  • Replacement 5200 lb Axle for Sailboat Trailer
    We have an axle that will work for you. The # 8327820 that you've already looked at measures 89 inches from hub face to hub face, and the spring seats are 74 inches apart, measured center to center. The 1 inch additional axle beam length which works out to 1/2 inch per side won't make any difference. However, you would need to replace the existing spring seats using part # TRSS300 and have them welded into the correct 72 inch center to center dimension to fit your needs, but this would...
    view full answer...
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Info for this part was:

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Written by:
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Expert Research:
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Expert Research:
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Installed by:
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Employee Wilson B
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