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  1. Trailer Axles
  2. Dexter
  3. 3500 lbs
  4. 89 Inch Long
  5. 74 Inch
  6. 5 on 4-1/2
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
Our Price: $285.19
Trailer Axles
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Shipping Weight: 54 lbs
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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. Great Prices for the best trailer axles from Dexter. 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 or call 1-636-306-4830 for expert service.
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Dexter Trailer Axles - 35545I-ST-89

  • 3500 lbs
  • 89 Inch Long
  • 74 Inch
  • 5 on 4-1/2
  • Leaf Spring Suspension
  • Idler Hubs
  • Dexter
  • No Drop or Lift
  • 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.


Dexters 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

457458 Loctite Viper Lube High Performace Synthetic Lubricant - 14.1 oz Can

Customer Satisfaction Score:

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:  4.8 out of 5 stars   (293 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.


Prompt delivery. Shipment was well protected from in transit damage.The axle fit my trailer perfectly and the u-bolts I ordered with the axle fit as they were supposed to. My wheels were old with a slightly larger bolt circle than the new hubs. Before I abrasive saw cut the old u-bolts, I tried the new hubs with the old wheels and they did not match up. I had to get new tire and wheels with the 4.5 bolt circle mounting holes. Not a big deal as I needed to replace the ties anyway. But testing the old wheels with the new hubs before cutting the the old u-bolts meant I didn't have downtime on the trailer while waiting for the new wheels and tires. The whole changeover, removing the old axle, installing the new axle, and mounting the tires took me about 3 hours at a leisurely pace.


Great axle. Very pleased with it. I was shipped the wrong axle butt etrailer sent the correct one and I was able to ship the wrong one back later. Got me on the road a little quicker.
Other than that mishap,Ian pleased with the axle and would consider buying from etrailer in the future.


E trailer has excellent products and great customer service. I really think the videos on each product is very very helpful. I’ve had dealings with other trailer parts vendors and etrailer is the best of all to deal with. Hats off to this well organized company. They will stay on my trailer need list.


Bolted right into the springs that my bent axle came out of. I was surprised it came with grease as well! Hopefully it lasts 30 years like the one I took off


easy to do


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.


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.




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!


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!


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




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.


very good products , i buy from etrailer all the time


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.




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


Great product, fast shipping will buy again. Thanks



Good hubs




Everything fit like a glove!! Thanks.



So far everything great!

Show More Reviews

See what our Experts say about this Dexter Trailer Axles

  • 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.
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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...
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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...
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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.
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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...
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  • 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 the...
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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.
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  • 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 will...
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    Image 1 for
  • 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.
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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...
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    Image 1 for Image 2 for Image 3 for
  • 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.
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  • 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...
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  • 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...
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  • Diameter of 3,500 lb Dexter Trailer Axle 35545I-ST-89
    Axles that are 3,500 lbs are all 2-3/8 inches in diameter, and that is the diameter of the 3,500 lb Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs # 35545I-ST-89.
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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 old...
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  • 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 in...
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  • What Info Is Needed to Pick Out Replacement Axle for Jet Ski Trailer
    When picking out trailer axles for a trailer you have to match two dimensions. The distance between the spring center so that it can bolt up to hardware on trailer and the distance from hub face to hub face so that the length is correct overall where the wheels will be placed. With the trailer axle # 35545I-ST-89 that you referenced your trailer would need to have 74 inches between the spring seats and 89 inches from hub face to hub face.
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  • Recommended Axle Replacement On A Carry-om 6x12 Utility Trailer
    When it comes to The Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 89 inch Long - 3,500 pounds # 35545I-ST-89 it is not a direct replacement but it will work for your Carry-On 6x12 utility trailer. This axle has a underslung design- spring seats are welded to underside of axle for mounting leaf springs. The bearings, races, seals, grease caps, wheel studs, lug nuts, and marine-grade wheel bearing grease are included. The hub face to hub face is 1 inch longer then your...
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  • Axle Needed with 89 Hub Face and 74 Spring Center Measurements
    If you are looking for an axle and hub combo that has a hub face of 89" and a spring center of 74" then we do have a few options for you. We have both idler hubs and hub and drum assemblies both of which come with either an EZ lube cap or a standard grease cap. Electric Brakes Standard Cap - # 35545E-ST-89 Electric Brakes EZ Lube Cap - # e43SR Idler Hub Standard Cap - # 35545I-ST-89 Idler Hub EZ Lube Cap - # 35545I-EZ-89 All of these alone are rated for 3,500 lbs and features a 5 on 4-1/2"...
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  • 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 Axle Spring Seats Be Relocated
    You can certainly relocate the spring perches if you wish, it's a pretty common practice. The process of removing them will likely render them useless, however so you'll likely need to replace them. We offer replacements as part # TRSS238 which are compatible with a 2-3/8 inch diameter axle beam like what the # 35545I-ST-89 axle you'd looked at uses.
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  • Replacement Needed for the Titan Hub T1721400042
    I have a potential alternate option, but unfortunately, the Titan Trailer Hub Assembly for 2,500-lb Axles - 5 on 4-1/2 - Cast T1721400042 is no longer available from the manufacturer. As this uses an uncommon combination of inner and outer bearings, I recommend replacing the axle with a more common set up. With that said, the Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs # 35545I-ST-89 will come with idler hubs and includes all bearings, seals, caps,...
    view full answer...
  • Recommended Replacement 3,500 Lb Trailer Axle
    For you to upgrade your system you will need a new axle along with the hub. It looks like you were looking at the Dexstar Vintage Steel Wheel, part # AM20395. This is a 4 lug wheel that would be used on a 3,500 lb axle. I will make some recommendations for 3,500 lb systems for you. I would recommend a system that includes the hubs or for a system with brakes a system that includes the hub, drums, and brakes. One system I recommend is the Dexter Trailer Axle with Idler Hubs, part #...
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  • Option For Replacing Axle On Trailer With No Hub Available
    The only suggestion I can offer is a replacement axle, and the reason for that is there simply aren't any hubs with a 15118 inner bearing and 09074 outer bearing. I realize this isn't the news you were looking for, but due to the age of the axle and the fact there aren't any replacement hubs, the best option over the long-term will be a new axle. If this is a route you want to go, there are a few things you'll need to know in order to determine the right replacement axle. The first is...
    view full answer...

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