Spindle 1.5" SQ x 4" STUB (1750 lb)

Spindle 1.5" SQ x 4" STUB (1750 lb)

Item # SP20484

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Spindle 1.5 Inch SQ X 4 Inch Long Stub
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Product Images

Videos


  • For 3500 lb Axle
  • Standard Spindle
  • Square
  • 1-1/2 Inch Diameter
  • 4 Inch Long
  • Redline
Lowest Prices for the best trailer spindles from Redline. Spindle 1.5" SQ x 4" STUB (1750 lb) part number SP20484 can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (16)
  • Q & A (79)
  • Videos (1)
  • Photos
  • Why etrailer?

Redline Trailer Spindles - SP20484


  • Includes washer, castle nut and pin
  • Works with hubs that have L44649 and L68149 bearings
Diagram

Part No. Capacity A B C D E F Round/Square
SP20484 1750 lb 1.50 1.73 1.38 1.06 1.00 4.00 Square


SP20484 Spindle 1.5" SQ x 4" STUB (1750 lb)






Video of Spindle 1.5" SQ x 4" STUB (1750 lb)


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




Video Transcript for Redline Trailer Spindles - Standard Spindle - SP20484 Review


Customer Reviews

Spindle 1.5" SQ x 4" STUB (1750 lb) - SP20484

Average Customer Rating:  4.6 out of 5 stars   (16 Customer Reviews)


- SP20484
by:

I received my order on time, the package was a little beat up from the weight of 4 hubs and 4 spindles. They maybe could of used a little better protection inside the box as they were a little rough when I opened them, but they will still work fine. 341381



- SP20484
by:

I am building a custom trailer and these stub axles fit the bill exactly. Loved the personal service and the help. I tried a few other sources before going online to order from etrailer. [An online tool retailer] was one and their online site was a mess without help and so was a retail location. etrailer, was quick to find me exactly what I needed and got me fixed up in just a few minutes. From now on all my trailer needs will be fulfilled from etrailer!!! 466158



- SP20484
by:

good quality, shipped in good protected wrapping, I use these in an unconventional way I install on side of trailer and mount complete hub assembly, with spare tire, if loose bearing or hub or lug nuts, I have everything needed to repair, plus spare tire. 297923



- SP20484
by:

Product was received on time and was just what we needed. We had to get our trailer back into service quickly and the spindle we required was shipped out fast, and we were able to install it in our shop and get back to work. Thanks for a good product and great service. 558649



- SP20484
by:

waited a few weeks for a few items, but was updated several times while I waited. the components all look great, good workmanship and such. only have a few miles on the set. will give a update after we have put some miles on them. thank you 468205



- SP20484
by:

Thanks & fast shipping and nice perfect fit 1 1/2 square tube to 2" square tube 1/4 thick ! Thanks John Sliva 430570



- SP20484
by:

They worked very well 309860



- SP20484
by:

Package was on the doorstep last night when I got home from work...very impressive service, tech support, and delivery time, thank you! 294598



- SP20484
by:

EXCELLENT QUALITY PRODUCT 235051



- SP20484
by:

etrailer always provides easy ordering options as well as fast order processing and delivery. Thanks, very happy. 211946



- SP20484
by:

Product arrived as promised Parts look excellent Look to be correct for my application Now to see if they hold up Which I feel they will Thanks 184716



- SP20484
by:

Your products and service are first cla ss. 173402



- SP20484
by:

The axel stubs are very nice quality and will be easy to weld to my 2 X 2 Box Tube axel. I have had very good support from ETrailer for my home built trailer project. Thanks 129410



- SP20484
by:

Timely and good 128963



- SP20484
by:

Just what I was looking for. 122292



- SP20484
by:

havnt used them yet but they look damn good :p 107380


16
16

Ask the Experts about this Redline Trailer Spindles
Do you have a question about this Trailer Spindle?


  • Available Sizes of Trailer Axle Spindles
  • Redline EZ Lube Spindle # R20384EZ does include a brake mounting flange already welded in place. The linked page displays all of our spindle products which include square-stub spindles without brake flanges like # SP20484. We do have 1-3/4-inch spindles but note these all have a round stub end, not a square stub. Spindles should be selected based on the axle's weight rating. This ensures the spindle has enough capacity to match the axle.
    view full answer...

  • Axle Kit for Fabricated Ice House Trailer
  • All of our trailer spindles are shown on the linked page, but none of these has a stub end to fit 2 x 3-inch tubing. All are either round like # R20384EZ or square like # SP20484. For a fabrication project like yours a better solution may be a bolt-on axle-less suspension kit from Timbren, such as # A12RS440, which is rated for 1200-lbs and which includes idler hubs with the 4-on-4-inch bolt pattern. Bearings, races and seals are included with hub. All Timbren axle-less kits and beam...
    view full answer...

  • 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 etrailer.com # AKHD-545-2-EZ-2K. For an idler assembly you can use part # AKIHUB-545-2-2K. 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...
    view full answer...

  • What Size Axle Does a #84 Spindle Fit
  • A true 1 inch spindle is a BT8 spindle. The next closest one would be the BTR spindle which is commonly referred to as a 1-1/16 inch spindle and is more common than the BT8. Both of these are typically used with 2,000 lb axles. A #84 spindle is bigger and is used for 3,500 lb axles. Common sizes for these are 2-3/8 inch round axle, 3 inch round axle, and 2 inch square axle. I have attached a helpful article that shows the different spindle selections that we offer and what size axles...
    view full answer...

  • Spindle Recommendation for Trailer Hub with Bearing Dimensions of 1.25 and 1.75 inch
  • The spindle you would need would be one that has the number 42 dimensions. The part # R50342EZ 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...

  • Spindles for a Trailer Hub Assembly for 3500 lb Axle
  • The following spindles will fit hub 84545BX 1. Spindle 1.5 SQ x 4 STUB, # SP20484, 1750 lb 2. Spindle 1.75 RD x 4 STUB, # R20484 3. Spindle 1.75 RD x 6.5 STUB, # R2061-284.
    view full answer...

  • 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...

  • Brake Mounting Flange Location Measurement on Spindle # R20384EZ
  • We only have one spindle with the brake flange for me to measure. The EZ Lube Spindle 1.75" RD x 3" STUB # R20384EZ has a measurement of 1.23 inches from the step in the spindle to the outermost part of the brake flange. I've attached a photo to assist. The brake flange # 4-34 or # 4-35 needs to be welded perfectly perpendicular to the axle so it is recommended to have a professional with a jig do this welding. There is not a brake flange fit for the square axle spindle # SP20484.
    view full answer...

  • 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 # R20384EZ that would fit the same hubs as the # SP20484 that you referenced. Also, the # SP20484 is a square spindle and we only offer flanges for round spindles.
    view full answer...

  • Determining Replacement Hubs for EZ Lube Spindles
  • EZ Lube spindles are compatible with all idler hub and brake hub and drum assemblies, and the only difference is the seal and grease cap. To determine the correct replacement hub for your trailer, you will need to pull off your existing hubs to determine the bearing numbers. The difference between the EZ lube hub and drums and the non EZ lube hub and drums is the grease cap and seal. The EZ lube ones like the # 84546UC3-EZ have a removable rubber seal on the cap that allows you to access...
    view full answer...

  • Replacement Trailer Hub that Uses Bearings with Inner Diameters of 1.25 and 0.75 Inches
  • Based on the measurements you have provided hub # AH15450ECOMP is a close match. The bearings that it uses fit on spindles with the measurements you have provided. But the seal has an inner diameter of 1-1/2 inches. It is not uncommon for the seal inner diameter to be smaller to provide a tight fit. This is an agricultural hub so it isn't very common and being an aggie hub means it is limited to 20 miles per hour. It might be more beneficial to replace the axle on the trailer to get...
    view full answer...

  • Recommended Spindle And Hub Assemblies For 1-1/2 Inch Square 2,000-Lb Axle
  • The spindle that you referenced, part # SP20484, will work great for you. This spindle features a 4 inch long stub, and is rated for a 3,500-lb axle. I have attached a link to a product review video for this spindle you can check out. The installation of this spindle should be done by a qualified professional welder because it is important that the spindle is welded in place as square and concentric as possible. The hub assembly designed to work well with the SP20484 spindle is part...
    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...

  • Looking for Grease Seal Bushing
  • The surface of the # SP20484 where the grease seal rides is an integral part of the spindle, not a bushing. We do offer some Bearing Buddy grease seals like # BB60002 that provide a bushing like the one you speak of, but nothing that would work with the specific # SP20484 spindle you referenced. If you use a different spindle, I would be happy to recommend the proper Bearing Buddy grease seal for you, if one is available. If you would care to provide me with the inner and outer bearing...
    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. 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...

  • 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...

  • 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 # R20484, if your axle is round or item # SP20484 if your axle is square....
    view full answer...


Do you have a question about this Trailer Spindle?




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Info for this part was:

Expert Research:
Michael L
Expert Research:
Robert G
Expert Research:
Michael H
Expert Research:
Jeff D
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Jameson C
Expert Research:
John H
Expert Research:
Adam R
Expert Research:
Rachael H
Expert Research:
Jeffrey L
Photos by:
Zach O
Updated by:
Sarah W

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