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

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

Item # e72GR
Our Price: $368.89
Trailer Axles
Shipping Weight: 59 lbs
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Round trailer axle beam measures 89" from hub-face-to-hub-face and 74" from spring-center-to-spring-center. Includes pre-greased idler hubs - with bearings, races, and seals - for 13" to 15" wheels. Great Prices for the best trailer axles from etrailer. Trailer Axle with Idler Hubs - 4" Drop - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs part number e72GR can be ordered online at or call 1-800-940-8924 for expert service.
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etrailer Trailer Axles - e72GR

  • 3500 lbs
  • 89 Inch Long
  • 74 Inch Long
  • 5 on 4-1/2 Inch
  • Drop - 4 Inch
  • Leaf Spring Suspension
  • Idler Hubs
  • etrailer
  • Easy Lube Spindles

Round trailer axle beam measures 89" from hub-face-to-hub-face and 74" from spring-center-to-spring-center. Includes pre-greased idler hubs - with bearings, races, and seals - for 13" to 15" 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 (sold separately)
    • Low ride height makes it easier to load and unload your trailer
  • 4" Drop, Easy Grease spindles
    • Lowered axle beam provides lower deck height for easier loading and unloading
    • Patented welding process prevents spindle failure with 40% stronger welds
    • Built-in grease zerk for simple lubrication
  • Spring seats and spindles are welded on
  • Cast iron idler hubs are sturdy and durable
    • Pre-greased idler hubs with bearings, races, seals, and lug nuts - no need to pack bearings
  • CSA, QAI, and SAE-N certified
  • Lifetime technical support from the experts at


  • Weight capacity: 3,500 lbs
  • Hub-face-to-hub-face length: 89"
  • Spring-center-to-spring-center length: 74"
  • Spindle drop: 4"
  • Hub bolt pattern: 5 on 4-1/2"
  • Grease cap flange diameter: 1.988"
  • Wheel stud dimensions: 1/2" diameter x 1-5/16" long
  • Axle diameter: 2-3/8"
  • Wheel size: 13" to 15"
  • Limited lifetime warranty

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.

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.

etrailer Axles

etrailer 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.

Bearing, Race, and Seal Information

  • Bearings (included)
    • Inner bearing: L68149 (1.378" inner diameter)
    • Outer bearing: L44649 (1.063" inner diameter)
  • Races (included)
    • Inner race: L68111
    • Outer race: L44610
  • Grease seal (included): 58846
    • Inner diameter: 1.719"
    • Outer diameter: 2.565"

Thoroughly Tested for Safety

This hub-and-drum assembly meets the requirements for certification by the Canadian Standards Association (CSA). The CSA creates standards, which when complied with ensure a safe and quality product. This assembly underwent extensive testing to measure stopping distances when braking. This assembly has also been tested by QAI Laboratories for braking performance in a complete automotive setup and under real-world conditions to provide the most realistic scenario for the everyday driver.

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"

BD35RUW89.00074.000 etrailer by AxleTek 3,500 lb Axle Beam w 4" Drop - 89" Hub - 74" Sp Ctr

17-110 Idler Hub Assembly Compl Boxed - 3.5K - 5 on 4.5 - PG EZ

Customer Satisfaction Score:

Customer Reviews

Trailer Axle with Idler Hubs - 4" Drop - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs - e72GR

Average Customer Rating:  4.8 out of 5 stars   (240 Customer Reviews)

Round trailer axle beam measures 89" from hub-face-to-hub-face and 74" from spring-center-to-spring-center. Includes pre-greased idler hubs - with bearings, races, and seals - for 13" to 15" wheels.


excellent choice for the price. made a trailer from scratch and acle worked well


When I opened the box I was missing the 4 hubs. I called CS 2:30 on a Wednesday and notified them. I was going out of town Friday to fix a trailer. I told Bailey with CS this and she said I will have them by Friday I be darn 10am Friday they were at my door. I am Houston not very close to them. I guess they sent them air. Anyway excellent CS and the parts are quality as well I have ordered from them before Thanks Bailey.


everything was shipped and rapped great. all working great a year latter.




I'm currently installing it to replace a practically good Axle but the Spindle on the original Axle doesn't have Cotter Pins. A friend suggested I change the bearings since the wheel was wobbling but after I changed them, the wheel continued to come off. After watching U-Tube Videos, everyone of them had Cotter Pins, so I decided to be safe rather than sorry and replace the Axle with one of yours plus now ALL the bearings are NEW with New Hubs, WELL WORTH THE MONEY I SPENT.


Easy ordering, axle arrived on time and no damage. The axle worked perfect for my camping trailer, would recommend your company any time.


I purchased two of these axles to replace my old square ones. They appear to be good quality but they arrived damaged. The grease fittings on the ends were smashed because packaging wasn't adequate. I've emailed back and forth and was shipped the wrong parts for replacement. In the end I was told I'd have to cut the spindles off and replace them. All I need is new grease zerks that thread on the ends of the axles. Be prepared to purchase these on your own because customer service is subpar on a remedy and the way they package them for shipping does not prevent damage.


Needed to beef up my little trailer project from a 4 lug to a 5 lug st up.These were perfect, and arrived quickly!


Axle and hubs were good quality. Dimensions were spot on 48" center hole of perch to center hole of perch. But.......some knucklehead built my trailer with 47" centers - so I ground off the perches and relocated on 47" centers. Took just over an hour to cut, measure, grind and weld old perches on new centers.

There was one odd phenomenon I've not seen before. The cotter pin hole was not driven through the center axis of the axle but rather offset to one side. Maybe that's how things are made these days.....or someone sneezed at the factory and the cotter pin holes moved. Nonetheless it's installed and works.

My Etrailer salesman, James X-72990 was pleasant in taking my order but told me the axle wouldn't be here for over a week. Then - he must have done something and the axle showed up in 2 days.....(Thanks James) Good product, good experience.

Joe (Bucks County Pennsylvania)


The axle is of great quality, I had to have mine fabricated a bit to match the old spring seats.but I wouldn't hesitate to buy the axle. The shipping and customer service is top notch from etrailer. Excellent products, services and shipping...


Just what I ordered, had to modify to fit my 1720lb Harbor Freight trailer as far as the spring seats. I knew that going in so no big deal. Great help and info from the order person.

Matched it up with bigger tires and etrailer finders!!!


The original axle on my trailer suffered a catastrophic event, making it absolutely unusable. The replacement from etrailer fit like a glove and installed in a very reasonable amount of time. I couldn’t be happier.


Axle worked just as it should. The best things about this company are their selection, speed of processing and communication. The best customer service of any company. Ashley was extremely helpful and quick to answer my questions. Terrific service company


The axle and hub/bearings were great, very good quality.
Just fyi, regarding the u-bolt kit, 2 of the 4 u-bolts supplied were 3/8 UNC thread and the other 2 were UNF--- but all the nuts were UNF --- fortunately I had some spare UNC nuts on hand. Very pleased with the quality and speedy delivery.


Unwrapped, looks good not yet assembled


Fast delivery, well packaged, so the axle wouldn't get damaged during shipping! Would for sure order again, and highly recommend etrailer!


I might have measured it wrong, but it still worked fine. I just didn't know where to measure from. My axle was broken, and couldn't get measured good.


Perfect fit, was hoping it was made in USA


Great product , and very good replacement and upgrade form my old one.


Good: Excellent service by Lori B. Full order arrived quickly.
Acceptable: Light surface rust on the axle mount. Nothing major. Otherwise five stars.
Would recommend to others.


Axle fit perfectly. Delivered quickly. And after a year it is still working great.


Would give it a 5 except one of the grease fittings was damaged in shipping. The axle should be shipped without the grease fittings attached. Shippers stand the axle on end, crushing the fittings on the end.


Had a shipping problem not etrailers fault they shipped another axle right away very quickly customer friendly for sure


Great product

Show More Reviews

See what our Experts say about this etrailer Trailer Axles

  • Availability of 3,500 lb Trailer Axle that is 89 inches Long that Has 4 inch Drop
    The etrailer axle part # e72GR matches everything you need but you didn't mention the spring seat to spring seat dimension you have which is only piece of the puzzle missing. The spring seat dimension is the attachment point for the axle to the trailer so this has to be exact. This axle has a 74 inch dimension for that and if that matches what you have it would work really well. All of the axles we have that match what you listed have this dimension as 74 inches so if you have something...
    view full answer...
  • Replacement for 5-Lug Bolt Pattern, 89" Long Axle with 4" Drop and 74" Spring Centers
    Yes, if sounds like you're looking for the Trailer Axle with Idler Hubs # e72GR or Trailer Axle w/ Electric Brakes # e95SR for your application. These both match the hub-face and spring-center measurements you referenced, they have the 4" drop, and they also use the standard 5 on 4-1/2" bolt pattern you mentioned. Attached is an installation video of an axle for you to check out!
    view full answer...
  • Recommended In Bed Wiring Harness for a 2023 Chevy Silverado 2500
    Yes, there is. You will want the Demco 5th Wheel/Gooseneck 90-Degree Wiring Harness item # DM8555002. This harness puts a 7-way connector in the bed of your 2023 Silverado and allows you to keep the one on your bumper. This makes hooking up to your 5th wheel trailer easier and more convenient. The harness plugs into existing wiring so you don't have to cut into your new trucks factory wiring harness. I have linked an installation video below.
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  • Replacement Axle For a Boat Trailer With a Old Tapered Spindle of 1.5 Inches to 1.25 Inches
    Based on your spindle tapering from a 1.5" diameter to 1.25" it sounds like a odd sized spindle which is no longer used. If you can provide me with some more information including the weight capacity and axle type on your trailer I can help you select a new axle like the Axle # e72GR. This particular axle has a hub face to hub face measurement of 89", spring center to spring center of 74" and is rated for 3,500lbs of trailer weight.
    view full answer...
  • Are Spring Seats for Dexter E72GR 3500 Lb Axle Available Separately
    We do sell the spring seats or perches separately as part # TRSS238 which are sold individually. You can remove the existing spring seats or simply leave them in place if they don't interfere with anything, then weld the new ones where they're needed.
    view full answer...
  • How to Tell if Trailer Axle Will Fit 1987 Ranger Trailer
    If your current axle has 89" hub face and 74" spring center measurements then yes, the Trailer Axle with Idler Hubs - 4" Drop - 5 on 4-1/2 Bolt Pattern # e72GR can be used as a replacement but you'll also need to swap out your U-Bolt setup for the CE Smith U-Bolt Kit # CE23002 since you'll be changing from a square axle to a round axle. Attached are some review videos as well as a photo showing where to measure for the hub face and spring center measurements.
    view full answer...
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  • Recommended Replacement for Torsion Axle on Shorelandr Boat Trailer
    I do have replacement options for you but we don't carry torsion axles which I assume is what you have so the best option we can offer you is an axle-less like system the Timbren Axle-Less Trailer Suspension part # ASR3500S04 which also has a built-in drop like your existing. It has a 3,500 lb weight capacity but there's several other variations if this isn't what you need, just check the list below. These systems are great because they provide much better ground clearance and ride quality...
    view full answer...
  • Replacement 3,500 lb Axle Recommendation with 4" Drop and 5 on 4-1/2" Bolt Pattern
    For your application we have the Timbren Axle-Less Trailer Suspension System w Hubs - 4" Drop Spindle - 5 on 4-1/2 # A35RD545. This has the weight rating, 4" drop, and hub bolt pattern you're looking for and since it installs directly to the trailer frame there aren't any specific hub face or leaf spring measurements it matches with. If you're wanting to stick with the same axle type you currently have then you'll need to reach out to a local trailer shop and have them order a custom one...
    view full answer...
  • Replacement Axle-Less Suspension for a Boat Trailer
    I have a solution for you but we don't have any axles with a 92" length. Instead I recommend using the Timbren Axle-Less Trailer Suspension item # ASR3500S05. This axle-less suspension system will attach directly to your boat trailer's frame. It has a 3,500 lbs capacity.
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  • Replacement Axle for 2007 Marine Master Trailer for 21 Foot Triton Boat
    When it comes to finding a replacement axle, you need to know the length which is the hub face to hub face measurement, as well as the capacity. Although we do not have square axle replacements, I do have a solution. I recommend the Timbren Axle-Less Trailer Suspension System. Since this system fits any trailer frame width, you will only need to find the capacity of your current axles to find the right replacement. This should be listed on the axle tag. If you are unable to find it on...
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  • 89 inch 3,500 lb Trailer Axle, Suspension and Hangers for Utility Trailer
    We do have 89 inch 3,500 lb trailer axles that come with idler hubs like the part # e65GR which is a straight axle or the part # e72GR which is a 4 inch drop axle. Both of these have their spring seats at 74 inches apart on center. Then for a leaf spring the part # e68SR is for a 3,500 lb axle and would work great. For a u-bolt kit to secure the axle to the leaf springs you'd want the part # APUBR-1 and for a single axle hanger kit with everything else needed you'd want the part # APS4. For...
    view full answer...
  • U-Bolts & U-Bolt Plate For Trailer Axle e72GR
    The correct 5-1/2" U-bolts and U-bolt plates for the Trailer Axle with Idler Hubs # e72GR are the following: - U-Bolt with Nuts for 2-3/8" Round Trailer Axles - 1/2" Diameter # 176400 - U-Bolt Plate - 2-3/8" Diameter, Round Trailer Axle - 1-3/4" Wide Spring - 1/2" Bolts # TRTP238175 You can get them individually since you mentioned only needing seven, but it does also come in a kit that has four U-bolts and plates, the U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long...
    view full answer...
  • Recommended Leaf Springs and Hanger Kit for Trailer Axle with Idler Hubs - 4" Drop - 5 on 4-1/2 Bolt
    I do have everything you need to install the Trailer Axle with Idler Hubs part # e72GR but we don't offer an all inclusive kit. That said, there are only a few other parts needed to complete the task which I have attached below. Single-Axle Trailer Hanger Kit for Double-Eye Springs part # APS1 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles part # e54SR I have also attached for you below a list of wheel/tire options compatible with this axle as well.
    view full answer...
  • Replacement for 80-5/8" Long 3,500 Pound Axle With 4" Drop and 5 on 4-1/2 Bolt Pattern
    It sounds like you're looking for a 3,500 lb axle measuring 80-5/8" long with a 4" drop. I do have a solution, but we do not have an axle that matches this length. What I can offer is the Timbren Axle-Less Trailer Suspension System. This system fits any trailer width and will upgrade and replace your suspension in addition to the axle. If you don't need brakes then you can use the # A35RD545. If you would like an option with brakes then you need the # A35RD545E instead. Both of these...
    view full answer...
  • Recommended Axle Upgrade For Installing 15" Wheels and Tires On Harbor Freight Trailer
    That's going to depend on the specs of your trailer frame and current axle measurements. To go with a standard axle you'll need to measure the hub face to hub face measurement, and spring seat to spring seat measurement (shown in diagram below) to find a compatible axle, but I can tell you from experience you'll almost 100% be ordering a custom axle to get one with the capacities/specs you're looking for to fit your trailer as they tend to come with a much smaller 2,000lb axle. The easiest...
    view full answer...
    Image 1 for
  • Replacement 3,500LB Spindle/Axle Options For Boat Trailer With Obsolete Tapered Spindle 5 on 4-1/2
    Your spindle is an obsolete size and will need to be replaced. We have a couple options such as our Replacement Weld On Straight Spindle # TRU77FR or the 4" Drop Spindle # TRU87FR both of which are designed to weld onto a 2-3/8" outside diameter axle tube. Then you will be able to use a standard size 3,500LB Idler Hub # AKIHUB-545-35-EZ-K. We also have some axle options if you would rather just get a replacement axle you can bolt on. Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern...
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  • Replacement Axle Options for 91-1/2" Axle with 4" Drop for Boat Trailer
    Our standard drop axles measure 89" long and then 94" long. It's possible to use a larger hub face like the etrailer 94" Long Axle # e35GR but you need to make sure the 78-1/4" spring center measurement lines up and that the 7K weight rating isn't too much for your application. For slipper springs we don't have anything that matches 26" exactly, but we have the 5-Leaf Slipper Spring # e74SR that is made for a 7K axle and measures 26-5/8" long overall. Aside from a standard axle setup...
    view full answer...
  • Recommended Replacement Snowmobile Axle For a 2,200-LBS Axle
    The closest I was able to find was the: -Dexter Trailer Idler Axle Beam with EZ-Lube Spindles # T20BTR-EZ-7258. This axle has a 2,200-lbs weight capacity, a hub-face-to-hub-face measurement of 72", a spring-center-to-spring-center measurement of 58", and a spindle size of 1-1/16". Since it's not exactly what you need, I recommend checking out the Timbren Axle-Less Trailer Suspension System - 4" Lift Spindle w/Flange # TASR1THDS04 instead. This is a universal solution that has a maximum...
    view full answer...
  • Can Bearings and Brakes From 3,500 lb Axle be Used for New 3,500 lb Axle
    You should be able to remove your hubs and brakes from your current 3,500 lb axles and put them on a new one since they all use the L68149 inner and L44649 outer bearings. You can double check those bearings numbers and that your brakes mount using a 4-bolt pattern to make sure it will be compatible. For a replacement axle we have traditional axles like the Dexter Axle # T3584F-EZ-8974 which has 89" hub-face and 74" spring-center measurements or you can go a different route with the Timbren...
    view full answer...
  • Replacement Axle Options For Snowmobile Trailer With 2,200LB Torsion Axle
    I have some Timbren Axle-Less options for your snowmobile trailer as we currently do not carry torsion axles. The System # ASR1THDS01 places the hub face 6" from the trailer frame and the System # ASR1THDS02 moves the hub face to 8-1/2" from the trailer frame. Both of these systems use a larger spindle for a 3,500lb axle so you will need an Idler Hub # AKIHUB-545-35-EZ-K which has a 5 on 4-1/2" bolt pattern.
    view full answer...
  • Determining Replacement Hubs And Bearings For My 2005 Wesco 128 Trailer
    This is an torsion axle on your 2005 Wesco 128. You also think the axles are rated for between 3,000 lbs and 3,500 lbs. Without your specific axle model, I can only speculate which hubs and bearings you need based on the information you provided. For example, we offer a torsion axle rated for this weight, the Dexter Trailer Axle Beam with 4" Drop E-Z Lube Spindles - 89" Long - 3,500 lbs, part # 8327812. If your axle has the same measurements, the hub face to hub face measurement of 89"...
    view full answer...
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  • Parts Needed To Build A 3,500LB Trailer Frame For a Homemade Tear Drop Trailer
    While we do not carry trailer frames we do carry all the other parts you are going to need to build your tear trailer. I have compiled a list of parts that you can use to build a 3,500lb GVWR Trailer. Trailer Axle with Idler Hubs # e72GR Single-Axle Trailer Hanger Kit # APS4 4-Leaf Double-Eye Spring # SP-210275 Qty 2 Demco Coupler # DM37ZR LED Trailer Light Kit # TL16RK Trailer Fender # HP36VR Qty 2 Kenda Karrier ST205/75R14 Radial Trailer Tire with 14" Black Mod Wheel # AM32131 Qty 2 You...
    view full answer...

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Info for this part was:

Employee Mike L
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