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  1. Trailer Axles
  2. etrailer
  3. 7000 lbs
  4. 94 Inch Long
  5. 8 on 6-1/2 Inch
  6. 78-1/4 Inch Long
Trailer Axle w/ Electric Brakes - 4" Drop - 8 on 6-1/2 Bolt Pattern - 94" Long - 7,000 lbs
etrailer

Trailer Axle w/ Electric Brakes - 4" Drop - 8 on 6-1/2 Bolt Pattern - 94" Long - 7,000 lbs

Part Number: e85SR
$746.73
Trailer Axles
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Trailer axle measures 94" from hub-face-to-hub-face and 78-1/4" from spring-center-to-spring-center. Includes electric brake assemblies, hubs, drums, bearings, races, seals and mounting hardware. Easy Grease spindles for simple lubrication. Great Prices for the best trailer axles from etrailer. Trailer Axle w/ Electric Brakes - 4" Drop - 8 on 6-1/2 Bolt Pattern - 94" Long - 7,000 lbs part number e85SR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (144)
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  • Videos (3)
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etrailer Trailer Axles - e85SR

  • 7000 lbs
  • 94 Inch Long
  • 8 on 6-1/2 Inch
  • 78-1/4 Inch Long
  • Drop - 4 Inch
  • Electric Brakes
  • Leaf Spring Suspension
  • etrailer
  • Easy Grease Spindles

Trailer axle measures 94" from hub-face-to-hub-face and 78-1/4" from spring-center-to-spring-center. Includes electric brake assemblies, hubs, drums, bearings, races, seals and mounting hardware. Easy Grease spindles for simple lubrication.


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
  • Electric brakes are easy to install - no actuator or hydraulic lines necessary
    • Requires periodic manual adjustment
    • Includes adjuster plugs, mounting bolts, and hardware
  • Cast iron hubs are sturdy and durable
    • Pre-greased 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: 7,000 lbs
  • Hub-face-to-hub-face length: 94"
  • Spring-center-to-spring-center length: 78-1/4"
  • Hub dimensions: 12-15/16" diameter x 2-3/8" wide
  • Hub bolt pattern: 8 on 6-1/2"
  • Grease cap flange diameter: 2.722"
  • Wheel stud dimensions: 1/2" diameter x 1-5/16" long
  • Axle diameter: 3"
  • Wheel size: 16" to 17-1/2"
  • Limited lifetime warranty


Bearing, Race, and Seal Information

  • Bearings (included)
    • Inner bearing: 25580 (1.75" inner diameter)
    • Outer bearing: 14125A (1.25" inner diameter)
  • Races (included)
    • Inner race: 25520
    • Outer race: 14276
  • Grease seal (included): GS2250DL
    • Inner diameter: 2.25"
    • Outer diameter: 3.376"

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.


Note: Axle does not come fully assembled.


Pre-Greased Hubs

A trailer hub with the grease cap taken off shows greased bearings

The pre-greased hubs in this kit come with the bearings, races, and seals already installed, which makes for a faster install time and less mess to deal with. After you've put on the grease caps and lug nuts (included), you'll be ready to roll.


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.


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"


BD70RUW94.00078.250 etrailer by AxleTek 7,000 lb Axle Beam w/ 4" Drop - 94" Hub - 78.25" Sp Ctr

B12E-21 12" Electric Brake Assembly for 5.2/6/7K Axles - Left Hand

B12E-22 12" Electric Brake Assembly for 5.2/6/7K Axles - Right Hand

19-130 HubDrum Asmb Compl Boxed - 7K - 8 on 6.5 - 1/2" stud - PG EZ





Video of Trailer Axle w/ Electric Brakes - 4" Drop - 8 on 6-1/2 Bolt Pattern - 94" Long - 7,000 lbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Measuring To Choose The Right Trailer Axle

In order to find the correct replacement axle for your trailer there's a few things you need to do. The first one is we need to determine the capacity. The first place I always check for the axle capacity is on the axle tag, which is actually located on the axle. Now, most of these are in the center and they could be a white sticker or they could be a metal plate. Now, not all of them list the axle capacity, but the vast majority do, that's why I look here first. Granted, this is a new axle here, so the tag is in fairly good condition, but we can see on here GAWR, gross axle weight rating, 3,500 pounds, so I know this is a 3,500 pound axle.

So if you do have an axle tag and there isn't a capacity listed on there there may be a serial number, an axle number. And in which case, you could actually reach out to the actual manufacturer with this information and they should be able to give you the capacity. Some of the more common axle manufacturers on the market are Dexter and Lippert. So if you don't have an axle tag, that's okay. There is still other options to determine the capacity.

One would be to take a fabric tape measure and record the circumference of your axle tube. Now, once we have the circumference we can use the appropriate formula to get the diameter. And then using the diameter there's sort of a general axle guideline to determine capacity based on that diameter. So, for example, a 3,500 pound axle is gonna have a 2 3/8 inch diameter beam. Now, a 3 inch diameter beam would represent anywhere from a 5,200 pound to a 7,000 pound axle.

And there's also some larger ones as well as some smaller ones. So if we don't have that axle tag there we could just measure the diameter here of our axle tube. And another way is to actually look at the brake mounting flange bolts. Now, this is just gonna give you a rough ballpark. The 3,500 pound assemblies, they usually use this 4 bolt pattern where it's the larger 5200 to 7,000 pounds, use that 5 bolt pattern.

So that's more of a general guideline. That's certainly not all you wanna do, but it will help you reaffirm when you're measuring. So once we get to capacity there's two more things that we need to gather. The next one is going to be the hub face length. So the hub face length is gonna take our brake hubs into consideration. We're gonna be measuring from the part of the brake hub where our wheel mounts from one side to the other. So we'll go ahead and do that now. Now, once we have our hub face length, we need to determine our spring center length. So the spring center length is gonna be from the center of the leaf spring perch from one side to the other. So once we have all this information we can then use that to select the correct replacement axle for our trailer. We have a ton of different options to choose from based on a few different factors. Number one is the length of our axle, both the hub face and the spring center. There's gonna be several different options for each of these. There's also gonna be different axle capacities based on how heavy you need your trailer axle to be and how heavy your trailer is. Now, we always recommend replacing what's on your trailer with the exact same one that came off. So, for example, if your old axle had an 89 inch hub face that's what we'd recommend replacing it with. And the same goes for the weight capacity, although you can upgrade. No matter what capacity you need we should still have an option for you. Now, in addition to the capacity, we're also gonna have axles with a built-in drop if you need that, or just a straight axle. And we also have some different kits that are gonna come with some different components. We can either purchase the axle, just the spindle only axle. We could get this with an idler hub, or we could get this with an electric brake drum and some electric brakes, depending on what capacity you need..


Customer Reviews

Trailer Axle w/ Electric Brakes - 4" Drop - 8 on 6-1/2 Bolt Pattern - 94" Long - 7,000 lbs - e85SR

Average Customer Rating:  4.6 out of 5 stars   (144 Customer Reviews)

Trailer axle measures 94" from hub-face-to-hub-face and 78-1/4" from spring-center-to-spring-center. Includes electric brake assemblies, hubs, drums, bearings, races, seals and mounting hardware. Easy Grease spindles for simple lubrication.

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The axles are not yet installed. There was 1 bolt missing I called and they shipped it out immediately. to date everything was as they said. My delivery arrived much sooner than excepted. I would recommend using etrailer they have a very good process.



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Where the leaf spring sits on the axle was off about 1/4 inch had to finagle the axle abit but made it work.



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I ordered two axles to upgrade my trailer capacity to what the frame is rated for, 12,000lbs. The axles have great bearing seats and backing plate studs. The backing plates are fully assembled and ready to connect to the wires already installed into the axle tubes. The hub assembly went smooth and only one set of break shoes needed adjustment. A good buy along with the 5 fully assembled tires and wheels.



by:

Arrived on time and in good condition. The ends of the axel should be better protected. The delivery person dropped mine vertically on the asphalt. Fortunately, the crown nut took the blunt of the impact and the grease fitting wasn’t damaged.



by:

I used these axles to upgrade my travel trailer suspension.they Seem to be a good quality item. Good paint job on the axles. Compared to axles that came with the travel trailer. Which helps living on the coast.



by:

Great videos that walked me through the installation being I’ve never done something like this before!
The fit was prefect for my trailer.
The only issue was the grease zerts were galled in shipping & I had to replace both zerts.
My recommendation would be for etrailer’s shipper to provide better protection for the axle zerts.



by:

Great axle so far has handled everything I have put on it so far and that's been a lot. Bought this because I managed to bent the axle by hauling my wife's equinox on it and hit a pot hole the size of grand canyon that bent the axle beyond safe operation. The other axle didn't get bent nearly as bad as this one but will also be replaced in the next year or so. But so far this replacement brake axle has held up pretty well over the last year.



by:

The brakes came apart in shipping and there should be directions on how to put it together



by:

Great product, as described, staff was vary helpful in making the purchase easy.



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Part arrived early, great communication from the team at Etrailer through the proccess.



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No problems. It's working great.did a few trips no incidents.



by:

etrailer is the best. I've been dealing with them for years. The orders are always right. The products are top-of-the-line.
Delivery was fast and free.. I have ordered online and I have called and spoken to the sales staff there who were very helpful and knowledgeable about their products. If you have trailers and you don't give a trailer look, you are missing out.



by:

Aside from not received complete order the first time, I will still recommend etrailer for all your needs



by:

Great value. I upgraded a 3500lb trailer and with the added brake it really helps. I use it to haul tools around so it handles the weight much better. Towing is a breeze now. Installation was easy as well. I will be buying more axles and parts in the future.



by:

The replacement axle is working very nicely. It is well engineered and quality’s is evident



by:

Everything was going great on my new axle install today, until it wasn't. You shiped me the wrong lock washers for the brake backing plate. The correct nuts but the washers are to small. I'll have to pick them up because the customer is expecting the with to be done be today.



by:

Exactly what I ordered packaged nice and pregreased bearings.



by:

The axle fit perfectly. No instructions but not the first axle I've changed. Backing plate assembly should be pack a little better to keep them from being knocked around. Stellar service, fast shipping. Thanks



by:

Arrived in good condition; well-packaged. All parts look to be good quality in form, fit, & finish. Easy install.


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See what our Experts say about this etrailer Trailer Axles

  • How To Find Out Which 7,000lb Axles Will Fit 2021 Trails West Snowmobile Trailer w/ 5,200lb Axles
    It's possible, but I have no way of knowing which axle would fit so you'll need to either send me a picture of the axle tag on the center of the axle beam, or measure the hub face an spring seat lengths of your current axle as shown in the included diagram. You'll also need to note if you are needing a drop axle, like the # e85SR you were looking at, or a standard axle. Keep in mind you'll also be changing you wheels as a 5,200lb axle uses 6 lug hubs where 7k axles use 8 lug, and your...
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  • Wiring Needed to Connect Electric Brakes on etrailer 7K Axles to Trailer 7-Way
    Thanks for reaching out, and I'm glad you were able to determine fitment of the 7K etrailer Drop Axle # e85SR for your car hauler trailer! The wiring you need to connect all of your electric brakes up to your trailer is 10 gauge wire which we sell by the foot as part # 10-1-1. I also recommend picking up heat shrink butt connectors like part # DW05745-10 to protect your wiring connections from the elements. If you aren't familiar with how to run your brake wiring I'm adding a photo for...
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jacob T
Video by:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Conner L
Installed by:
Conner L
Employee Kristina F
Updated by:
Kristina F
Employee Carrie F
Updated by:
Carrie F
Employee Ryan F
Updated by:
Ryan F
Employee Mike S
Written by:
Mike S

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