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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: $382.10
Trailer Axles
Shipping Weight: 61 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 etrailer.com 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.


Features:

  • 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 etrailer.com


Specs:

  • 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:  4.7 out of 5 stars   (269 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.

by:

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



by:

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.



by:

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



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by:

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



by:

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.



by:

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.



by:

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



by:

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)



by:

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...



by:

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!!!



by:

Item was exactly as described. installed yesterday and everything fit perfect.
But one thing that did concern me was the way it was packaged for shipping. I think we clearly know how UPS handles items. Maybe boxing it up with foam inside would be ideal, but also understand the cost efficiency side of it. Just something to consider for future orders. overall thank you Etrailer for the item.



by:

Easy to work with company. Very helpful in helping me to select the correct axle. The videos installation were helpful. I have been traveling around the country with the new actual on my small mini camper and it's worked out great.



by:

axle is very rusty after one year as well as hubs, not sure why but price i paid it shouldnt be rusty



by:

Axle came pretty quick and we'll packaged. Hubs came in separate boxes. Took out the old one and attempted to put in new one. The mount brackets on the new ones are a full inch apart farther than the original, therefore it doesn't fit. Not sure what to do.



by:

The axle shipped on time, was a perfect match for what we were needing. I have ordered other products from etrailer and will continue to do so. Keep up the great work!



by:

Had to modify trailer and axle has worked has it should.



by:

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.



by:

Just what I was looking for. Speedy shi pping



by:

The box carrying the axle was empty. You might want to protect the ends of the tube better so it doesn’t fall out during delivery.



by:

Works great fast shipping nice people to deal with.



by:

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.



by:

Unwrapped, looks good not yet assembled



by:

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


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See what our Experts say about this etrailer Trailer Axles

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    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.
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Do you have a question about this Trailer Axle?


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Jacob T
Video by:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Leah S
Updated by:
Leah S
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Carrie F
Updated by:
Carrie F
Employee Conner L
Installed by:
Conner L
Employee Michael B
Installed by:
Michael B
Employee Mike S
Written by:
Mike S

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