1. Trailer Leaf Spring Suspension
  2. TruRyde
  3. Spring Seats
  4. Axle Mounting Hardware
  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
lowest price pledge
Retail:$7.12
Our Price: $5.37
You Save: 25%
Trailer Leaf Spring Suspension
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.69 lbs
Quantity: 
In Stock, Ships Today
TRSS300 - Round Axle - 3 Inch TruRyde Axle Mounting Hardware
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Videos

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 800-298-8924 for expert service.
  • All Info
  • Reviews (51)
  • Q & A (26)
  • Videos (1)
  • Photos
  • Why etrailer?

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   (51 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:

Fast shipping and great products. Only thing that would have been better was if it all would have been made in America. 269744


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

25812

- TRSS300
by:

Product was exactly as described. Used the info on website for location of mounts. Couldnt be happier. Awesome customer service as well. 756101



- TRSS300
by:

fast shipping very good price quality product will work great for flipping my axle 722186



- TRSS300
by:

They seem to be a good product the only reason for 4 stars is I haven't installed them yet but they look fine and should do what I need just fine easy ordering and fast shipping thanks 721800



- TRSS300
by:

Have not installed yet but product looks great. 691160



- TRSS300
by:

Product was as advertised, and it arrived 2 days early 666199



- TRSS300
by:

Parts look correct, it should make my axle repair much easier. 641342



- TRSS300
by:

Very good product. Made it here on time so I can finish my project. 605398



- 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 595983



- TRSS300
by:

These fit perfectly and are holding up like new with one year of hard use on the trailer through some very rough terrain. 579889



- 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. 574285



- TRSS300
by:

These are exactly what I needed; they were a perfect match for the axels. 560412



- 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. 512566



- TRSS300
by:

Everything that I ordered, came as described and by the date I was told. 503986



- TRSS300
by:

right ones 501824



- TRSS300
by:

everything fit and works as it should 501822



- TRSS300
by:

These axle blocks fit my axle perfectly and were very easy to weld in place. They have worked just as described. 490953



- 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 481198


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

50146

- TRSS300
by:

Thick metal, real good. 471248



- TRSS300
by:

No issues after a year in service 445907



- 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. 427367



- 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. 422604



- 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. 422512



- 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. 403946



- TRSS300
by:

It was exactly as described and actually arrived 2 day early! 392694


25
51
Show More Reviews

Ask the Experts about this TruRyde Trailer Leaf Spring Suspension

  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • How Does the Single-Axle Trailer Hanger Kit #APS6SE Work with 1.75 Inch Slipper Springs
    To assemble a slipper spring suspension system, you'll need several components: the hangers and bolts (included in the kit APS6SE); slipper springs, such as the 1.75 inch # SP-264275; spring seats such as # TRSS300; and a U-bolt mounting kit such as # # APUBR-8. The 1.75 inch springs attach the same as 2 inch springs would. The hangers attach the springs to your trailer frame. The U-bolt plates attach the springs to the axle. The spring seat welds onto your axle to provide additional...
    view full answer...
  • 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...
  • 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 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...
  • Available 94-Inch Long Axles and Matching 3-Inch Diameter Spring Seats
    We do offer 7K-rated beam axles in the 94-inch hub-face-to-hub-face length you mention, shown on the linked page, and these have their spring seats spaced apart on center at either a 78-1/4-inch or 79-inch dimension. Since we do not produce these axles ourselves we cannot make one for you with different spacing but you can have a local trailer/welding shop install new spring seats at the specific 70-inch spacing you need. Our spring seat to fit this 3-inch axle diameter, part # TRSS300,...
    view full answer...
  • 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...
  • Available 89-Inch Trailer Axles and Spring Seat Spacing
    All of our axles that have an 89-inch hub face spacing (see diagram, please) also have a spring center spacing of 74-inches. None of our axles has a 76-inch spring center spacing; the nearest ones are either 74 or 78-1/4-inches apart. But we can still help you with a new axle. You can refer to the linked page to see all of our axles. First select the weight rating of the axle you need. Our 89-inch axles such as # 8327830 are rated for up to 6K. Since you need spring seats in alternate...
    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...
  • 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...
  • 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...
  • How to Correct Trailer Whose Spring Hangers Do Not Line Up With Spring Seats
    You will need to have the spring seats removed to have them or new spring seats welded to your axle at the correct locations to match your trailer's hanger spacing. For a 3-inch round axle rated between 5200- and 7200-lbs use part # TRSS300; for a 2-3/8-inch diameter 3500-lb axle use part # TRSS238; for a 1-3/4-inch diameter 2000-lb round axle use part # TRSS175. If you cannot re-position the spring seats to match the hanger spacing then you can have a qualified welder install new material...
    view full answer...
  • Can the Dexter Trailer Axle Beam Part # 8327830 Be Used with a Top Mounted Leaf Spring
    In order to use the Dexter Trailer Axle Beam part # 8327830 with leaf springs mounted on top you would need to weld on new spring seats with part # TRSS300. The reason for this is that the existing spring seats are installed for use with a leaf spring mounted under the axle. Most think you can simply rotate the axle to move the spring seats on top but this cannot be done as the axle has a slight bend to help dissipate the weight when loaded.
    view full answer...
  • Parts Needed to Make Over Under Axle Kit for Trailer with 7k Axles
    You'd need new u-bolts like the part # CE23003 and then spring seats like part # TRSS300 and you'd be able to make an over under axle kit for your trailer with 7k axles. Basically you install the new spring seats on the opposite side of the axle and then move the axles to the other side and secure them with new u-bolts.
    view full answer...
  • Parts Needed to Install Trailer Leaf Springs Above the Axles
    You will need spring seats to mount Leaf Spring # SP-111275 to your axle. For a 3 inch axle use # TRSS300 and for a 2-3/8 inch use # TRSS238. For a complete kit to install your springs above the axle we have over-under kits. The it for 3 inch axles is # K71-385-00 and for here for 2-3/8 inch axles the kit is # K71-384-00. The kits include all the hardware you'll need.
    view full answer...
  • Replacement Trailer Axle with Electric Drum Brakes for Older Custom Trailer
    The beam axles we offer nearest to your 87-5/8-inch hub-face-to-hub-face measurement are 89-inches. All of these are rated for 3500-lbs and can be seen on the linked page. For an 89-inch kit with 74-inch spring centers and the 5-on-4-1/2-inch hub bolt pattern you could use kit # 35545E-ST-EZ-89. You can refer to the linked diagram to see how the hub face and spring center measurements are taken. If you need to make a different size axle work then you'll need to new spring seats welded...
    view full answer...
  • Recommended Over/Under Conversion Kit For Band Equipment Trailer That Sits Too Low
    We do not sell trailers as you described. You may be able to find a suitable trailer at a camper retailer near you. If you have double eye leaf springs on your trailer and the axles are either 2-3/8 inch or 3-inch diameter you may want to consider over/under kits. I recommend the Dexter Trailer Springs Over-Under Conversion Kit, part # K71-384-00, which is designed for the 3,500-lb axle with the 2-3/8 inch diameter. If you have a 3-inch diameter axle the Dexter Trailer Springs Over-Under...
    view full answer...
  • Spring Seat to Attach On Opposite Side of Trailer Axle # 6340624-EB
    We don't have a version of the axle part # 6340624-EB that has the spring seats on the opposite side but you can weld a set on the other side with an additional set of seats with part # TRSS300.
    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...
  • How to Determine Fit of 8327816 Replacement Dexter Trailer Axle
    The Dexter Trailer Axle you mentioned, part # 8327816 is not a trailer specific part. If its 5200 lb capacity meets or exceeds the capacity of your current axle and the 86-1/2 inch hub face to hub face and 71-1/2 inch center spring seat to center spring seat measurement match up to what you currently have, the axle will work well. The spring seat dimension isn't horribly important, you can always grind it off and relocate a replacement like # TRSS300 if need be. This axle is compatible...
    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...

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




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality trailer leaf spring suspension for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer leaf spring suspension information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Written by:
Lindsey S
Expert Research:
Robert G
Expert Research:
Michael H
Installed by:
Cole B
Updated by:
Sarah W
Updated by:
Alexander C

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.