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 800-298-8924 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   (62 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:

Working great after welded onto the axle. No problems 1 year later. 863510



- 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. 844832



- TRSS300
by:

Quick and easy. Thanks! 819601



- TRSS300
by:

As described, excellent product 810077



- TRSS300
by:

Fit the axel perfectly! 812035



- TRSS300
by:

Got it today and it is a stout product! 805424



- TRSS300
by:

Worked fine, happy with purchase 794616



- TRSS300
by:

great product great prices 791506



- 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! 783032



- TRSS300
by:

Thanks , extremely fast delivery and exactly as described. 767488



- TRSS300
by:

Great fit exactly what I needed 766858



- 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


25
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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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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 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...
  • 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...
  • 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...
  • Does Dexter 6,000 Pound Axle Come with Spring Seats Welded on Top of Axle
    We do carry spring seats that can be welded on the top of the # 7461121 axle but it doesn't come that way. The spring seats are part # TRSS300.
    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...
  • Replacement 5,200 Axle for 2015 Keystone Cougar Trailer
    The best option we have for a trailer with damaged spindle threads is a new axle beam as there isn't any sort of repair kit, the Dexter Trailer Axle Beam part # 8327816 matches what you need although you'd have to move the spring seats part # TRSS300 in a few inches to match what you have now.
    view full answer...
  • Axle Replacement for 6,000 lb Axle with 78.25 Inch Spring Seats
    You are measuring correctly for the spring seats and you definitely want to replace that axle as the spindle is toast. You will also want to measure for the hub face to hub face measurements. If you have 89 inch hub to hub, you can use the Dexter Trailer Axle Beam with E-Z Lube Spindles - 89" Long - 6,000 lbs # 8327830 but you will need to have the spring seat # TRSS300 welded in the correct locations. If you have 95 inch hub face to hub face, you can use the Dexter Trailer Axle Beam...
    view full answer...

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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

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