1. Trailer Axles
  2. Dexter Axle
  3. 3500 lbs
  4. 89 Inch Long
  5. Leaf Spring Suspension
  6. 74 Inch
Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs

Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs

Item # 35545I-ST-89
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Dexter Axle Leaf Spring Suspension - 35545I-ST-89
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Round trailer axle measures 89" from hub face to hub face and 74" from spring center to spring center. Includes idler hubs - with bearings, races, and seals - for 13" to 17-1/2" wheels. Lowest Prices for the best trailer axles from Dexter Axle. Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs part number 35545I-ST-89 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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  • Reviews (16)
  • Q & A (39)
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  • Why etrailer?

Dexter Axle Trailer Axles - 35545I-ST-89

  • 3500 lbs
  • 89 Inch Long
  • Leaf Spring Suspension
  • 74 Inch
  • 5 on 4-1/2
  • Idler Hubs
  • Dexter Axle
  • Standard Spindles

Round trailer axle measures 89" from hub face to hub face and 74" from spring center to spring center. Includes idler hubs - with bearings, races, and seals - for 13" to 17-1/2" wheels.


  • Round axle beam acts as part of your trailer's suspension system
    • Replace an axle on your trailer
    • Fabricate a suspension to fit your application
  • High-strength steel construction
  • Bend in axle creates zero camber angle for even road-to-tread contact across the width of your trailer's tires
    • Best for straight-line acceleration and steady, controlled towing
  • Underslung design - spring seats welded to underside of axle for mounting leaf springs
    • Low ride height makes it easier to load and unload your trailer
  • Straight spindles - no drop
    • Standard grease application
  • Spring seats and spindles are welded on
  • Cast iron idler hubs are sturdy and durable
    • Bearings, races, seals, grease caps, wheel studs, lug nuts, and marine-grade wheel bearing grease included
  • Limited 2-year warranty


  • Weight capacity: 3,500 lbs
  • Hub-face-to-hub-face length: 89"
  • Spring-center-to-spring-center length: 74"
  • Flange-to-flange length: 82-5/8"
  • Hub bolt pattern: 5 on 4-1/2"
  • Tubing outer diameter: 2-3/8"
  • Spindle size: 1-1/16"
  • Brake flange configuration: 4 bolt
  • Grease cap outer diameter: 1.986"
  • Wheel stud diameter: 1/2"
  • Wheel size: 13" - 17-1/2"

Bearing, Race, and Seal Information

  • Bearings
    • Inner bearing: L68149
    • Outer bearing: L44649
  • Races
    • Inner race: L68111
    • Outer race: L44610
  • Seal: 58846
    • Inner diameter: 1.719"
    • Outer diameter: 2.565"

Axle Dimensions

Hub Face and Spring Center Measurements on Standard Trailer Axle

There are multiple ways to measure the length of an axle beam, but the hub-face-to-hub-face and spring-center-to-spring-center lengths are the most accurate. Hub face (A) refers to the length of the axle measured from the base of one wheel stud to the base of the wheel stud on the opposite side of the axle (when hubs are mounted on the beam).

The spring center (B) is the approximate width of your trailer. It is measured from the center of the spring seat on one side of the axle to the center of the seat on the other. This axle beam comes with the spring seats welded on.

Hub Face and Spring Center Measurements on Standard Trailer Axle

Another helpful measurement to have is the flange-to-flange (C) length, which is measured from the outside of one brake flange to the outside of the one opposite. This length may be easy to obtain if you are replacing an axle, but it's important to note that this measurement is not the preferred method for determining which axle will best fit your trailer.

If you are replacing your trailer's axle, you should be able to figure out which type you need by determining your trailer's capacity, the bolt pattern of your wheels, the brake type and the aforementioned lengths.

Dexter Axles

Dexter axles are made of high-strength steel and come with spindles and spring seats welded on. The spring seats are attached to the underside of the axle so that the leaf springs (sold separately) can mount beneath the axle. The result of this underslung design is a trailer that rides a bit lower for quick and easy loading and unloading.

Each axle is manufactured to create a certain camber angle. This ensures that the angle of the wheels is correct for your towing needs. Because the primary concern when towing is maintaining controlled, in-line movement, each axle is made so that your trailer's tires will run along the pavement evenly, with contact across the width of the tread. The result is excellent straight-line acceleration for steady, in-line tracking. You might notice the bend near the center of the axle; this is what ensures the proper camber angle. Having the center ride a bit higher and the sides of the axle bent lower allows the axle to give just enough to compensate for the load.

Determining the Bolt Pattern

The first number in the bolt pattern is the number of bolt holes. The second number denotes the diameter, in inches, of the circle on which the bolt holes sit.

Bolt Pattern - Even

On wheels with an even number of bolt holes, measure from the center of one bolt hole to the center of the hole directly across from it. (Example: 8 on 6-1/2 means 8 bolt holes with 6-1/2" from the center of one hole to the center of another on the opposite side.)

Bolt Pattern - Odd

To determine the bolt-circle diameter on wheels with an odd number of bolt holes, measure from the center of any bolt hole to the point halfway between the two bolt holes directly across from the first. (Example: 5 on 4-1/2 means 5 bolt holes with 4-1/2" measured to a point halfway between the opposite bolt holes.)

Bolt Pattern - Side

Measuring the distance (D) from the center of one bolt hole on the wheel to the center of a bolt hole right next to it can also help to determine the bolt pattern.

  • If D = 2-5/8", then the bolt pattern is 5 on 4-1/2"
  • If D = 2-3/4", then the bolt pattern is 5 on 4-3/4"
  • If D = 3", then the bolt pattern is 5 on 5"
  • If D = 3-1/4", then the bolt pattern is 5 on 5-1/2"

T3584F-8974 Dexter Replacement Axle Beam - 89" Hub Face - 74" Spring Center - 3,500 lbs

84545BX Trailer Hub Assembly for 3,500-lb Axles - 5 on 4-1/2

L11404 LubriMatic Marine Trailer Wheel Bearing Grease - 16 oz. Can

Customer Reviews

Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs - 35545I-ST-89

Average Customer Rating:  4.9 out of 5 stars   (16 Customer Reviews)

Round trailer axle measures 89" from hub face to hub face and 74" from spring center to spring center. Includes idler hubs - with bearings, races, and seals - for 13" to 17-1/2" wheels.

- 35545I-ST-89

Direct replacement axle for an older Big Tex landscape trailer I own. Make sure you understand what measurements you need to take from your old axle before ordering. Installed easily, all required parts where in the box (including grease and lug nuts). Also purchased the U-bolt kit.

- 35545I-ST-89


- 35545I-ST-89

Installed the dexter 3500 axle and new springs on my 17ft boat trailer and immediately drove the trailer for over 700 miles in one day and the trailer was as smooth as could be. Great axle even came with a tub of marine grease.

- 35545I-ST-89

very good products , i buy from etrailer all the time

- 35545I-ST-89

All products were as ordered. Plan on building custom trailer for custom smoker. Taylor M represents your company very well. Will continue to use your store when needed and will definitely recommend to others.

- 35545I-ST-89

Has been a great buy. Thank for the quality axle.

- 35545I-ST-89

Product has preformed as stated it would. We use the trailer that this axle went on every day and have no problems.

- 35545I-ST-89

All of the delivered parts were exactly as you said they would be. The videos are extremely helpful for us guys who don't do this stuff every day. I am impressed with your whole company. If I need more parts for my trailer, I know where I will go. Thanks!

- 35545I-ST-89

etrailer had the parts in stock, at a good price and with free shipping that was also quick! A great e-retailer to do business with!

- 35545I-ST-89


- 35545I-ST-89

So far everything great!

- 35545I-ST-89

What I got was the best product on the market, along with free shipping, at 20% less cost that any of the competition. All this delivered to my door very fast (3 days only). Why anyone would shop elsewhere is beyond me.

- 35545I-ST-89

Good hubs

- 35545I-ST-89

Great product, fast shipping will buy again. Thanks

- 35545I-ST-89

Everything fit like a glove!! Thanks.

- 35545I-ST-89

Great fast service


Ask the Experts about this Dexter Axle Trailer Axles

  • 89 inch Trailer Axle Recommendation for Trailer without Hubs
    We have a few options for an 89 inch long hub face to hub face axle with 74 inches for spring seats. For that you'd want the part # T3584F-EZ-8974 for a 3,500 lb axle, part # 8327830 for a 6,000 lb axle, or # 8327820 for a 5,200 lb axle.
    view full answer...
  • Can Custom Axles be Ordered or is there an Alternative to Straight Trailer Axles
    Straight axles can be made to order by visiting a local trailer/tractor supply store but I have a better alternative. I recommend switching to a Timbren axle-less system # ASR3500S05. This system takes the place of the axle and the suspension. The rubber suspension requires no maintenance and won't corrode like traditional leaf springs which will save you money over the life of the trailer. I have linked a video review for you.
    view full answer...
  • Methods to Determine Actual Trailer Weight and GVWR
    If you can contact the trailer manufacturer with the VIN from their product they should be able to tell you a good bit about it including its GVWR (gross vehicle weight rating), which is the most it can weigh when loaded. The empty trailer's actual weight should also be available. The characters in a VIN do denote certain specific information, as shown in the linked photo that displays an example VIN. But actual weight and total weight capacity is not among them. Often trailer axles...
    view full answer...
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  • Picking Out Leaf Springs for Triton LXT Aluminum PWC Trailer
    When replacing trailer leaf springs we strongly recommend you replace them in pairs. I would urge you to get a set of matching properly rated springs for your trailer instead of just replacing one. If you look on the frame of your trailer there should be a plate with the trailer VIN number and the axle capacities of the trailer. You will want to pick leaf springs that are as close to the axle capacity as possible. You will want to also measure the distance from eye to eye of your...
    view full answer...
  • Availability of 3500lb Axle 89 Inches Long 74 Inch Spring Centers
    We can come pretty close to the dimensions you mentioned. Dexter Axle # T3584F-8974 is a 3500 lb capacity axle with a hub face to hub face dimension of 89 inches and a spring seat center to center measurement of 74 inches. This isn't the exact spring center dimension you were looking for, but it would be very easy to grind off the old seats and weld replacements like # TRSS238 into place. The standard spindles are compatible with a L648149 inner and a L44649 outer bearing. If you prefer...
    view full answer...
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  • Measuring for Replacement Dexter Axle
    From your photo, it looks like you have a Dexter axle, part number 51955. From my research, it appears this is likely a 3,500-lb axle. However, the weight capacity should be listed on the axle itself, so it would be best to confirm this before purchasing a replacement. You'll also need to know the axle length. I've attached a photo showing where to measure your axle for the correct length. I've also included a link to our axle product listings. Once you know your measurements, you can...
    view full answer...
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  • How Much Upward Bend Should Trailer Axle Have
    While trailer axles do feature an upward bend like you are describing, there isn't a particular amount/measurement that is standard across the board. This bend in the axle is designed so that it will straighten under a trailer's loaded capacity. While I can't really say for sure if the bend you measured at the rear on your trailer is normal or not, the damage that it is causing to the frame is certainly cause for concern. This either indicates that there is indeed too much of a bend or...
    view full answer...
  • Trailstar Trailer Axle is Bent Causing Tires to Wear Quickly
    The problem may not be your axle at all. Is it bent upwards or downwards towards the ground? If it is upwards then that is normal but down means it does need to be replaced. The reason axles have an upward arc to them is so that when a load is placed on them they straighten out and your tires run evenly. When the inside of the tread on your tires wears on the inside that is a good indication that you are overloading the axle which is causing it to bend down too much. Try checking...
    view full answer...
  • Dexter Axle 3,500 Pound Axle for Enclosed Trailer
    The 74 inch spring center will be roughly the width of your trailer's frame center to center. If this is accurate for your application the # 35545I-ST-89 Dexter axle is the appropriate length. It's rated for 3,500 pounds and includes the idler hubs, bearings, races, seals, grease caps, wheel studs, lug nuts, and grease. The bolt pattern on the hubs is 5 on 4-1/2.
    view full answer...
  • Shorelander boat trailer axle
    In order to choose the correct replacement axle for your boat trailer you will need to know the dimensions of your current axle's hub face to hub face and spring center to spring center as in the diagram I have added; the other thing you need to know is the weight capacity of the axle you need, which should match or exceed the GVWR of your trailer. For example the Dexter Trailer Axle with Idler Hubs # 35545I-ST-89 has a 3,500 lb capacity and measures 89 inches from hub face to hub face...
    view full answer...
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  • How to Find the Correct Replacement Axle for Triton Trailer
    We do not have any types of parts lists for specific trailers, so in order to choose the correct replacement axle, you will need to know the dimensions of your current axle's hub-face to hub-face and spring center to spring center as in the diagram I have added; the other thing you would want to know is the weight capacity of the axle you need. I've added a link to our selection of axles for you to take a look at.
    view full answer...
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  • How to Find the Length of a 3,500 lbs Dexter Torsion Axle
    I just want to make sure when you say track measurement, you mean the center to center distance between the tires. Another industry term for this measurement is the Hub Face measurement. The best way is to measure from tip-of-spindle to tip-of-spindle and subtract 4-3/8" and that will give you the hub face measurement on Dexter torsion axles. Another way is to measure the brake flanges outside to outside and add 6-3/4" and that will give you the results.
    view full answer...
  • Can Dexter 3,500 lb Axle Be Used on Tandem Axle Trailer in Saltwater
    The 3,500 lb Dexter trailer axle part # 35545I-ST-89 is very commonly used on tandem axle trailers so it would be a great option. As far as saltwater use it will work for a decent amount of time before corroding, but that's to be expected since saltwater is pretty corrosive and there's no way around it. People use this axle in saltwater applications pretty frequently though.
    view full answer...
  • How to Choose an Axle to Replace Torsion Axle on a 1999 Bantam Travel Trailer
    I do have a way for you to measure for an axle on your 1999 Bantam trailer. The hub-face measurement (A) would be the same as what you have now and the spring-center measurement (B) is taken from the center of one side of your trailer frame to the center of the exact opposite side of the frame. The spring-center is where your leaf springs will be hanging. Since axles like the Dexter # 35545I-ST-89 have the spring seats already welded on it is important to have an accurate spring-center...
    view full answer...
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  • Upgrading Trailer Axle To 3500 lb Capacity With Over-Under Kit
    You can change from a 3000 lb axle to a 3500 lb axle. We have the Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs, # 35545I-ST-89 or the Dexter Trailer Axle w/ Electric Brakes - EZ-Lube - 5 on 4-1/2 Bolt Pattern - 89" - 3,500 lbs, # 35545E-ST-EZ-89. The biggest measurements to consider are the hub face to hub face and the spring center to spring center measurements for compatibility. The axle under the springs is what is called and over-under....
    view full answer...
  • Should Utility Trailer use Mobile Home Axles
    First, the most important thing I can tell you is that mobile home axles are made for one time use and should not be used on utility trailers; for that you would need an axle designed for use on RVs and to choose the correct replacement axle for your trailer you will need to know the dimensions of your current axle's hub face to hub face and spring center to spring center as in the diagram I have added; the other thing you need to know is the weight capacity of the axle you need, which...
    view full answer...
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  • Identifying the Axle from a Home-Built Trailer
    There are a couple ways to determine what kind of axle you have. If there aren't any part markings on the axle or anywhere else on the trailer frame that list your trailer axle specifications, you need to measure your spindle with a calipers to get a precise measurement. I couldn't find a matching bearing based on the measurements you provided, so make sure you are using the right equipment to take these spindle measurements. You can also measure the axle diameter to get an idea of the...
    view full answer...
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  • What to do if Replacement Hubs are Not Available
    You are on the money that replacement hubs are not available with those bearing numbers, so the next option available is to replace your axle, which I realize isn't ideal but without hubs available is going to be necessary. In order to choose the correct replacement axle for your trailer you will need to know the dimensions of your current axle's hub face to hub face and spring center to spring center. The other thing you need to know is the weight capacity of the axle you need, which...
    view full answer...
  • Can I Use the Dexter 3500-lbs Axle with Overslung Suspension
    Yes. The Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs # 35545I-ST-89 will work with a trailer that has moved the leaf spring suspension to over the axles. Typically an axle has a slight bend in it because of the weight that it's going to bear, and will flatten out completely and be level to the ground. This won't affect the suspension that can be used with it. I've linked our entire selection of 3500-lbs axles for you to have a look at as well...
    view full answer...
  • Where to Measure to Pick Out Trailer Axle Replacement
    You would need to measure from the hub face to hub face and then from the spring mount centers to pick out the correct axle to fit your trailer. I attached a picture that shows where these measurements are.
    view full answer...
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  • Single Axle Hay Dolly Axle Upgrade with 1.375 Inner and 1.250 Outer Bearings on a Mobile Home Axle
    The only recommendation I could make for you would be to install new axles on your trailer. Mobile home axles are designed as one time use axles. They usually have odd spindle sizes on them that make them incompatible with standard trailer hubs. Attached is a page that has all of the axles we have with the correct hubs included. You will want to determine which will suit your trailer based on the overall length axle you want from hub face to hub face, then select the distance between...
    view full answer...
  • How to Choose Replacement Axle If No Replacement Hubs are Available
    We do have a potential solution for you, but no hubs that fit those measurements you gave, unfortunately. That isn't altogether surprising though considering you said you had mobile home axles, which are not meant for traveling more than once. So the best option we have is for you to replace your current axle. In order to choose the correct replacement axle for your trailer you will need to know the dimensions of your current axle's hub face to hub face and spring center to spring center...
    view full answer...
    Image 1 for
  • How to Choose Replacement Trailer Axle, Hubs and Leaf Springs for 2006 Magic-Tilt Boat Trailer
    We do not have a way to look up the original parts on your Magic Tilt BV16XWW boat trailer but we can help you with identification to allow selecting a replacement axle, hubs and leaf springs. For the axle you will want to find the trailer VIN sticker that indicates the axle weight rating, or you can check the axle itself for this information. We carry beam axles up to a 3500-lb rating, shown on the linked page, and some of these come with hubs as with part # 35545I-ST-89. We also offer...
    view full answer...
  • Recommended 3,500-lb Axle-less Trailer Suspension System
    The Dextar 3,500-lb axles we offer are not the Torflex brand. The beam axles we offer are a straight beam like part # 35545I-ST-89 with idler hubs or part # 35545E-ST-EZ-89 that has electric brakes, but I do have another option. I recommend the Timbren axle-less system. The axle-less systems we offer will work on any trailers and eliminate the need for springs and hangers and equalizers. They come with varied set-ups so you have a very flexible option. I have attached a link to our...
    view full answer...
  • Looking for a 3500 Pound Trailer Axle with or without Hubs
    All of the 3500 pound straight axles we carry measure 89 inches long hub face to hub face and 74 inches long on center from spring seat to spring seat. You would have to order an axle from a local tractor or trailer supply store to your specifications. The other option is to use axle-less suspension such as # ASR3500S05.
    view full answer...
  • Adapting a 89 Inch 3,500lbs Trailer Axle # 35545I-ST-89 for Overhung Application
    Yes, you will need a set of the # TRSS238 Spring Seats which will fit your 2-3/8 inch round axle to adapt your # 35545I-ST-89 89 inch 3,500lbs axle to make it compatible with an overhung application. You will want to make sure you take it to a local qualified professional welder to install the spring seats at exactly your 68 inch center. I have linked the correct spring seats to this page for your convenience.
    view full answer...
  • Can Brakes be Added to Second Axle in Tandem Axle Setup
    You can definitely add brakes to an axle without purchasing another one. The easiest thing is if your axle already has a brake mounting flange installed on it. If your axle doesn't then you can have one welded on, but we typically recommend replacing the axle in this case just because you can have the peace of mind that the flange was done professionally. I am attaching a link to some helpful articles on adding different types of brakes to an axle that you can check out. I am also attaching...
    view full answer...
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  • Question About a Product
    We have the standard size 3500 lb. axles that work with the Kenda 205/65-10 Bias Trailer Tire with 10" Galvanized Wheel part # AM3H490 or the 5 on 4.5" bolt pattern. Typically a 3500 lb. axle is going to 89". These are generally selected by the center to center of the spring seats and the hub face to hub face measurements. If you have an old axle let me know whatthese measurements are and I can help find a match. If you're building a trailer to use those tires you will need to go...
    view full answer...

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