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  1. Trailer Axles
  2. Dexter
  3. 3500 lbs
  4. 89 Inch Long
  5. 74 Inch Long
  6. 5 on 4-1/2 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
Our Price: $328.58
Trailer Axles
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Shipping Weight: 51 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 1-800-940-8924 for expert service.
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Dexter Trailer Axles - 35545I-ST-89

  • 3500 lbs
  • 89 Inch Long
  • 74 Inch Long
  • 5 on 4-1/2 Inch
  • No Drop or Lift
  • Leaf Spring Suspension
  • Idler Hubs
  • Dexter
  • 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   (359 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.


One year later, still works like the day I bought it. Heavy duty axle which has boosted my trailer capacity big time. Smooth and easy maintenance.


The procduct I have bought fell right into place and they protected the parts great and I'll recommend to anyone who needs trailer parts.


Arrived in good condition and what I ne eded.


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.


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.


Excellent durable product. Came quickly and included everything I needed to install.


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


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!


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


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!




very good products , i buy from etrailer all the time


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.


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.


easy to do


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

  • 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...
  • 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...
  • Hanger Kit, Leaf Springs, and U-Bolt Kit for Dexter 3,500 lb Trailer Axle
    The Dexter axle part # 35545I-ST-89 is a 3,500 lb trailer axle so for a leaf spring that would work well with that you'd want the # e45SR which is the same rating and is 25-1/8 inches long. Then for a tandem hanger kit you'd want the # AP233-H248 and the U-bolt kit part # CE23002.
    view full answer...
  • Recommended Replacement Hub With Inner Bearing L68149
    With the inner bearing having a 1.378" inner diameter, you have an # L68149 bearing. The 1.25" inner diameter can be a few different bearings, but these measurements are not typical. With that being said, we do not have a hub that will match these. If this is an older trailer, it may be a good idea to replace the axle. Something like the Dexter # 35545I-ST-89 will use one of the most common bearing combinations and actually has the hubs included. However, this will measure 74 inches from...
    view full answer...
  • Replacement 89 Inch Axle For 2010 Anderson LS612 Trailer
    Based on what I have found, your 2010 Anderson LS612 Trailer has a 3,500 lb axle. For a replacement axle you can use the Dexter # T3584F-8974. This matches your length and spring seat measurement exactly. If you're looking for a replacement that includes idler hubs with a 5 on 4-1/2 bolt pattern then you need the # 35545I-ST-89 instead.
    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 in...
    view full answer...
  • Converting 3,500 lb Torsion Axle to Spring Leaf Axle on Boat Trailer
    Hey Sam; thanks for the question and yes it is possible to go from a 3,500 lb torsion axle to a spring leaf axle on your boat trailer. You'll need to have new hangers welded on, as well as get leaf springs and, of course, the axle itself. For the hanger kit you can go with the Single-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front, 1-1/4" Rear # APS4 which gives you 5 inches of distance between the center of the axle and the trailer frame. For 3,500 lb leaf springs you can...
    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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  • 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 # e43SR 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 product page...
    view full answer...
  • Axle Alignment Off and Replacing Axle w/ a Timbren Axle-less System
    If your frame isn't twisted or bent you will need to move your axle hanger. Another option is to replace your trailer's axle with an axle-less system like the Timbren Axle-Less Trailer Suspension System - Straight Spindle Only item # ASR3500S05 for 3,500 lbs axles. Or the Timbren Axle-Less Suspension - Spindle Only - Regular Tires item # ASR5200S01 for 5,200 lbs axles. If you're interested in this option, send me an email with what model of trailer you have and what type of hubs and lug...
    view full answer...
  • 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...
    view full answer...
  • 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...
    Image 1 for
  • 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
  • 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...
    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...
    Image 1 for
  • 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...
  • 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.
    view full answer...
  • 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...
  • Recommended Solution for 3500-lbs Axle with 75 Center on Center Spring Seats
    I may have a solution for you, but we do not have a 90" long axle available; this would be a custom made axle and would need to be special ordered. If you can use an 89" long axle, there are some options available at this length that come with spring seats, and 75" would be the maximum spacing center on center without changing the capacity of the axle. With that said, you could use the Dexter Axle # T3584F-EZ-8974 which is the spindles only. There are also options for a complete axle...
    view full answer...
  • 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 with...
    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...
    Image 1 for
  • Availability of the Dexter Axle # 35545I-ST-89 Without Hubs
    Sounds like you don't need the hubs that come with the Dexter Axle part # 35545I-ST-89 and you just want the axle. For that you would just want the part # T3584F-EZ-8974 that you referenced.
    view full answer...
  • 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"...
    view full answer...
  • 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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