1. Trailer Spindles
  2. TruRyde
  3. For 3500 lb Axle
  4. Standard Spindle
  5. 1-1/2 Inch Diameter
  6. Square
Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide

Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide

Item # TRU47FR
lowest price pledge
Our Price: $51.71
Trailer Spindles
Orders above $99 qualify for Free Shipping
Shipping Weight: 4 lbs
Quantity: 
In Stock
Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide Square TRU47FR
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Videos

Need help with installation?
Locate installers near me
Replacement #84 spindle welds onto your 3,500-lb trailer axle. Works with L68149 inner bearing and L44649 outer bearing. Castle nut, washer, and cotter pin included. Lowest Prices for the best trailer spindles from TruRyde. Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide part number TRU47FR can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (4)
  • Q & A (92)
  • Photos
  • Why etrailer?

TruRyde Trailer Spindles - TRU47FR

  • For 3500 lb Axle
  • Standard Spindle
  • 1-1/2 Inch Diameter
  • Square
  • TruRyde

Replacement #84 spindle welds onto your 3,500-lb trailer axle. Works with L68149 inner bearing and L44649 outer bearing. Castle nut, washer, and cotter pin included.


Features:

  • Tapered spindle replaces a worn or damaged #84 spindle on your trailer
    • Can also be used to build a custom axle
  • Weld-on installation
  • Sturdy steel construction
  • Castle nut, washer, and cotter pin included


Specs:

  • Application: 3,500-lb trailer axles
    • Spindle capacity: 1,750 lbs
  • Stub dimensions: 1-1/2" wide x 3-5/8" long
  • Overall spindle length: 8-1/4"


Bearing, Race, and Seal Information

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

spindle diagram

Part NumberCapacityABCDEFRound/Square
TRU47FR1,750 lbs1.50"1.719"1.378"1.063"1.00"3.625"Square




SP-20484-SQNWC TruRyde (TRP) Replacement #84 Square Spindle for 3.5K Axles - 1.50" Wide x 8.25" OAL

Replaces SP20484






Customer Reviews

Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide - TRU47FR

Average Customer Rating:  5.0 out of 5 stars   (4 Customer Reviews)

Replacement #84 spindle welds onto your 3,500-lb trailer axle. Works with L68149 inner bearing and L44649 outer bearing. Castle nut, washer, and cotter pin included.

- TRU47FR
by:

1 1/2 spindle is the correct product. Once the spindles are,welded into the new axle the axle will be complete and should last for years .



- TRU47FR
by:

Just what I ordered. Shipped quickly. Arrived quickly



- TRU47FR
by:

Great service and products.



- TRU47FR
by:


4
4

Ask the Experts about this TruRyde Trailer Spindles

  • How To Determine If ST205/75R15 Tires Can Replace ST205/75R14 Tires On 1995 Travel Trailer
    It is possible that the ST205/75R15 will be able to replace the 205/75R14 tires currently on your 1995 travel trailer but you will need to take a few measurements to determine this. The ST205/75R15 like the Contender ST205/75R15 Radial Trailer Tire w/ 15" Vesper Silver Mod Wheel - 5 on 4-1/2 - LR D # MX84FR measures in at 7.99" wide and 27.13" tall where your ST205/75R14 tires measure in at 8.13" wide and 26.3" tall. To make sure you have enough clearance for a tire almost 1" taller...
    view full answer...
  • How to Pick Out Replacement Hub for Ski Boat Trailer
    In order to pick out the correct hub assembly for a trailer you are going to need know a few key pieces of information. The first thing you will need to know is the bolt pattern of your hubs. This is so you get a hub that is compatible with your wheels. I attached an FAQ article on determining bolt pattern for you to check out. Next thing you will need to know is what spindle you have on your trailer. In order to do that you can either get the inner and outer bearing numbers from a hub...
    view full answer...
    Image 1 for
  • How to Identify Compatible Hubs for Vintage Utility Trailer
    Thank you for the photo of your vintage utility trailer's spindle. The simplest and surest way to identify a compatible trailer hub is to identify the inner and outer bearings and the grease seal it uses. Matching up those components along with the axle weight rating and the hub bolt pattern is pretty much it. However, in your case I can tell you up front that we have only one hub that uses a bearing whose inner diameter is as small as 0.75-inches, hub # AH15450ECOMP. It uses outer...
    view full answer...
    Image 1 for Image 2 for
  • How to Determine if Trailer has 84 Spindle to Pick Out Replacement
    In order to verify the spindle dimensions so that you can pick out the correct hub/drum you have to get exact dimensions. For that you need to use a digital caliper like part # PTW80157. For how old your trailer is this is especially important as the standard spindles sizes have changed since 1969. An 84 spindle would measure 1.06 where the outer bearing rides, 1.38 where the inner bearing rides, and 1.73 where the seal rides. For a hub with a 6 on 5-1/2 inch bolt pattern that would...
    view full answer...
    Image 1 for
  • Replacement Square Spindle for 1994 Trail Rite Trailer
    For your axle the spindle you need the Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide # TRU47FR. This does not have the attached brake flange so you will need to either modify a flange like # 4-35 or salvage the one you have.
    view full answer...
    Image 1 for Image 2 for
  • 84 Spindle with Brake Mounting Flange Recommendation
    Adding brake mounting flanges to a spindle is something that only a qualified welder with experience welding them on should do. A much easier solution would be to go with a spindle that has a flange mounted to it already like the part # TRU74FR that would fit the same hubs as the # TRU47FR that you referenced. Also, the # TRU47FR is a square spindle and we only offer flanges for round spindles.
    view full answer...
  • Welding #84 Spindles # TRU84FR and # TRU57FR for Utility Trailer with 2-3/8 inch O.D. Pipe
    You have a 2-3/8 inch O.D. pipe so you might want to look at #84 Spindle, # TRU84FR, which has a 2 inch O.D. at the weld point and has a 1750 lb. capacity, so two spindles will give that axle 3,500 lb capacity. The #42 Spindle, TRU57FR which has a 2.25 inch O.D. at the weld point and is rated for 5,200 lbs to 7,000 lbs axles. The total capacities of the spindles are only valid if installed correctly and the axles are not broken or damaged in any way. The TruRyde #84 Spindle, # TRU47FR,...
    view full answer...
  • Spindle Recommendation for Trailer Hub with Bearing Dimensions of 1.25 and 1.75 inch
    The spindle you would need based on the dimensions you provided is what is referred to as a #42 spindle. The part # TRU37FR would fit and has a 5 bolt mounting flange for the brake assemblies. These have a 2,600 lb capacity per spindle. I attached a review video for you to check out as well as a picture that has all of the dimensions of the spindle listed.
    view full answer...
    Image 1 for
  • Recommended Hub Assembly For 1 Inch Diameter Spindles
    A BTR spindle uses a 1.063" diameter L44649 bearing and a BT8 spindle uses a 0.99" diameter L44643 bearing. In order to find out which you have you will need to pull the hub and either measure the spindle diameter where the inner and outer bearings ride with a digital caliper like # PTW80157 and/or look for the bearing numbers on stamped on the inside of each bearing. For a 1 inch in diameter spindle, I recommend the Trailer Idler Hub Assembly for 2,000-lb Axles - 4 on 4, # AKIHUB-440-2-1K....
    view full answer...
  • How to Determine Hub and Spindle Size
    The spindle dimensions are as follows: A is the mounting dimension, B is the seal dimension, C is the inner bearing surface, D is the outer bearing surface and E is the diameter of the threaded portion of the spindle for spindle nut selection. Say you need a spindle and hub for a wheel with 5 on 4-1/2 inch bolt pattern and an axle that is 3500 lbs. For a single axle trailer you can use two of either the item # TRU64FR, if your axle is round or item # TRU47FR if your axle is square....
    view full answer...
  • Where to Measure on Trailer Spindles to Determine Replacement Hubs
    You will need to measure the diameter of the spindles where the seal and bearings ride. Check out the picture I attached that shows where this is. You will need an exact measurement so either a digital or dial caliper will be needed. To pick out the correct hubs you will also need to determine the bolt pattern of the hubs you currently have so that the new ones will be compatible with your current hubs. I attached an FAQ on how to determine this. If you get back to me with that information...
    view full answer...
    Image 1 for
  • Old Trailer has 2 Different Sized Spindles and Obsolete Bearing and Seal Numbers
    That looks like a mobile home axle. It is possible that both axles are mobile home axles. But the problem with that is they are meant for one time use only. People get them because after they are used they are cheap. It is possible that this is also why the axles have two different sets of bearings. It is also extremely difficult to find parts for mobile home axles. The 2788 and 1779 bearings are associated with hub 22834 which is not available. The seal sounds like a # 29031 which has...
    view full answer...
    Image 1 for
  • Where to Measure a Trailer Spindle for Replacement Bearings, Seals, and Hubs
    I have included a picture that shows where you will want to measure the spindle. Measurements need to be as accurate as possible so I recommend using dial or digital calipers to take the measurements. If the other hub is still present you could pull it and get the inner and outer bearing numbers from it.
    view full answer...
    Image 1 for
  • Replacement Hub Assemblies for 2004 Tracker Trailstar Trailer
    If your hub uses the # L44649 bearing (1.063 inch inner diameter) for both the inner and outer bearings, and your Tracker Trailer is equipped with 2,000 pound axles, the correct hub and drum assembly should be the Dexter # 8-257-5UC3-EZ. For an idler assembly you can use part # 8-258-5UC1-EZ. These feature the 5 on 4-1/2 inch bolt pattern that you mentioned as well. I was not able to cross reference the seal number that you provided, so you will just want to make sure that your existing...
    view full answer...
  • How to Pick Out Replacement Hubs for a Boat Trailer
    In order to pick out the correct hub assembly for a trailer you are going to need know a few key pieces of information. The first thing you will need to know is the bolt pattern of your hubs. Since the figure you came up with doesn't match any of the 5-bolt bolt patterns I am going to need to to recheck your bolt pattern. For further info on this check out the FAQ article I attached on this. Next thing you will need to know is what spindle you have on your trailer. In order to do that...
    view full answer...
    Image 1 for Image 2 for
  • Tips for Determining Square Trailer Axle Capacity
    Square axles can be tough to determine capacity. Often times the same spindle fits a range of axle capacities. The best way to determine the capacity is to get the inner and outer bearing numbers stamped into the metal of the bearings like you did. The numbers you listed do not match any of the spindles we carry though so I was not able to determine anything from that. The bolt pattern of the hubs on the trailer is typically used on 2k-3.5k axles, most 15 inch wheel trailer setups have...
    view full answer...
    Image 1 for Image 2 for
  • Replacement Bearings for a Spindle that Measures 1.055 Inches
    A lot depends on where you are taking that measurement. If you look at the spindle main page I have linked for you, you will see the important spindle measurements I would need to determine what, if any, bearings we carry will fit. If you have access to the bearings still the best way to determine replacement parts is to get the inner and outer bearing numbers stamped into the metal of the bearings. If your 1.055 measurement is the C measurement from the spindle main page and the...
    view full answer...
  • Trailer Axles to Replace Mobile Home Axles on Car Hauler Trailer
    Mobile home axles are made for transporting such a dwelling only one time, to its permanent location. But they really are not suitable for ongoing use on a trailer. They simply are not made for that particular application, in the same way that passenger vehicle tires are not suitable for use on trailers. For safety reasons I recommend you replace the mobile home axles with actual trailer axles of the appropriate weight capacity for the trailer's GVWR. I linked our main page for beam...
    view full answer...
    Image 1 for Image 2 for
  • How to Tell if a Trailer Spindle is Damaged or Needs to be Replaced
    If you remove the hub and wipe away the grease on the spindle you can check to see if it is damaged. Look for an scarring, gouges, discoloration, or scoring on the spindle. If the spindle is damaged then the bearings won't ride properly and can fail again or it can cause other problems such as uneven or excessive tire wear and ride quality problems. If the spindle is damaged then you can't really repair it and the whole axle should be replaced. I doubt that this is the case based on...
    view full answer...
  • Removing and Replacing Trailer Spindles
    To replace a spindle, the old one would need to be cut off, and the new one welded into place. This is NOT a job for the do-it-yourselfer. The new spindle must be absolutely square with the axle in order to prevent premature tire wear and wheel tracking problems. I would recommend finding a welder who is experienced with trailer axles. Your local RV dealer or repair facility could probably refer you. In many cases, it's less expensive to simply replace the trailer axle itself. We offer...
    view full answer...
    Image 1 for
  • How to Determine Capacity of Square Axle
    Square axle capacities are pretty hard to determine. Unlike round axles, they do not have set capacities based on their dimensions. Based on the bearings your hub looks like it's rated for 3,500 lbs. Most likely that would be the same rating as your axles.
    view full answer...
    Image 1 for
  • How to Accurately Measure Spindle Dimensions
    The range of trailer spindles we offer is shown on the linked page. These include both round and square stub types rated for axles ranging from 2,000 lbs to 7,000 lbs. On the chart you can see the key dimensions for five points on the spindle, including where the grease seal rides (B) and where the bearings ride (C and D). Spindle dimensions must be taken with precision, to the nearest few thousandths of an inch; fractional dimensions are not accurate enough so you will want to use a...
    view full answer...
  • Can 15 inch Trailer Wheels be Replaced with 14 inch Trailer Wheels
    To go from a 15 inch trailer wheel to a 14 inch trailer wheel would only require you to match up the bolt pattern of what you currently have with what you would like to install. You will first need to determine what bolt pattern you have on your wheel. I attached a link to a help article that details how to do this. In the 14 inch trailer wheel size we have only the 5 on 4-1/2 inch bolt pattern. This is a very common bolt pattern though. You have the choice of a 215/75-14 like...
    view full answer...
  • How to Pick Out Replacement Hub for a Trailer with Rusty Hub
    Your question came in blank, but it looks like you are looking for replacement hubs based on the pictures you submitted. In order to pick out the correct hub assembly for a trailer you are going to need know a few key pieces of information. The first thing you will need to know is the bolt pattern of your hubs. This is so you get a hub that is compatible with your wheels. I attached an FAQ article on determining bolt pattern for you to check out. Next thing you will need to know is...
    view full answer...
    Image 1 for Image 2 for

Do you have a question about this Trailer Spindle?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality trailer spindles for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer spindle information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Lindsey S
Edited by:
Lindsey S
Employee Kathleen M
Installed by:
Kathleen M
Employee Alexander C
Written by:
Alexander C

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.