Spindle 1-1/2" Square x 4" Long Stub, for 2,000 lb. Trailer Axles

Spindle 1-1/2" Square x 4" Long Stub, for 2,000 lb. Trailer Axles

Item # SP204BT8

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SP204BT8 - For 2000 lb Axle Redline Trailer Spindles
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Lowest Prices for the best trailer spindles from Redline. Spindle 1-1/2" Square x 4" Long Stub, for 2,000 lb. Trailer Axles part number SP204BT8 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (26)
  • Q & A (52)
  • Videos (1)
  • Photos
  • Why etrailer?

Redline Trailer Spindles - SP204BT8

  • For 2000 lb Axle
  • Standard Spindle
  • 1-1/2 Inch Diameter
  • Square
  • Redline
  • 4 Inch Long


  • Includes washer, castle nut and pin
  • Overall length: 8-3/4"

Part No. Capacity A B C D E F Round/Square
SP204BT8 1000 lb 1.50 1.24 0.99 0.99 1.00 4.00 Square





Video of Spindle 1-1/2" Square x 4" Long Stub, for 2,000 lb. Trailer Axles


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 - SP204BT8 Review


Customer Reviews

Spindle 1-1/2" Square x 4" Long Stub, for 2,000 lb. Trailer Axles - SP204BT8

Average Customer Rating:  4.9 out of 5 stars   (26 Customer Reviews)


- SP204BT8
by:

Excellent Service 703764



- SP204BT8
by:

Perfect! 565195


Comments

Doing just fine.

Ted K - 09/16/2019

61196

- SP204BT8
by:

Simply super parts and service. I have plans to build an Ice Fishing house Will post when completed Thanks again 551794



- SP204BT8
by:

You always have what we want at a good price and you ship it promptly. Can’t ask for more. 505446


Comments

I appreciate your follow-up. It is evidence that your company cares. All is well here and I’m sure we will be shopping at etrailer in the future.

Christopher - 05/07/2019

54961

- SP204BT8
by:

I updated my heavy duty tractor drawn garden dump trailer with these new stub axles as well as new hubs, rims and tires. For my application these square axle stubs fit perfectly into the trailer's round axle tube. (sounds weird I know, a square peg in a round hole) Then you just have to locate them where you want them in the axle tube and drill through the square end of the stub so you can install a securing bolt. They have had heavy use for the last year. No issues at all. 493939



- SP204BT8
by:

We use them regularly to manufacture Heavy Duty Industrial Carts and they work great. 472330



- SP204BT8
by:

Good product at a good price. Meet my needs perfectly. 452002


Comments

Good

Buddy W - 11/14/2018

45711

- SP204BT8
by:

Excellent service very satisfied 424819



- SP204BT8
by:

Always great and prompt service. Qualtiy of shaft works well for welding 389557



- SP204BT8
by:

We have been very satisfied with the products purchased for our operations. We utilize these components for our commercial operations mostly off road and they have held up very well. Etrailer has proved to be a valuable resource for us both in the quality of components that we utilize from them as well as the price point at which they sell the products. We will continue to utilize them in the future as we grow. 321228



- SP204BT8
by:

Thanks so much for such good service. I haven't installed the spindles and hubs yet but plan to in the near furture. I am well satisfied with my order. I needed some advice before I ordered, so I called and talked to Patrick , if I remember correctley. He was big help. Thanks again for great service and products. 301192



- SP204BT8
by:

Order spindle for boat trailer, great quality, fast shipping, good price. 281260



- SP204BT8
by:

Spindle fit perfectly as replacement for old one. Package arrived right on time. I would recommend etrailer to anyone looking for quality trailer parts 257046



- SP204BT8
by:

They fit perfectly 248568



- SP204BT8
by:

works great 248006



- SP204BT8
by:

Perfect fit. A+ machine work. 238812



- SP204BT8
by:

Prompt Service, Great Prices! Wide selection of items. High quality parts with a helpful informative staff. 234144



- SP204BT8
by:

Product was exactly as expected 190180



- SP204BT8
by:

Exactly what I was looking for, Perfect and great price. Thank you. 189897



- SP204BT8
by:

Good quality. Works exactly as expected. 188868



- SP204BT8
by:

Strong material, good price, fast shipp ing 183616



- SP204BT8
by:

exactly what I was looking for. 179588



- SP204BT8
by:

Part is exactly what I needed and shipped quickly! 156533



- SP204BT8
by:

Item as described, prompt handling and fast shipping, excellent selection and value. 154960



- SP204BT8
by:

Item was Excelent, fit perfectly, delivered promptly. 148489



- SP204BT8
by:

Very user-friendly website. Spindle and hub assembly shipped very quickly and communication was excellent. 110539


26
26

Ask the Experts about this Redline Trailer Spindles

Do you have a question about this Trailer Spindle?


  • How to Find the Correct Replacement Hub
  • There is a way to find the correct replacement hub, but not by the size of the hub face. In order to find the correct replacement hubs for your trailer, you need to first know what bearings your current hub has; you should be able to see the part number stamped directly on them. If you are unable to find them, you need to use a digital caliper such as # 301-17068 and measure your spindle to the thousandths of an inch where the bearings and grease seal ride. You can use the photo I've attached...
    view full answer...

  • Trailer Hub w/6 Lug Pattern, Inner Bearing Inner Diameter 1.5", Outer Bearing Inner Diameter 1.25"
  • Bearing measurements need to be as accurate as possible, to at least the thousandth of an inch, and require calipers such as # 301-17068 if you have to measure them. Otherwise look at the bearing numbers that are stamped into the sides of the bearings. With those numbers we can determine a lot about the running gear and if anything else will fit. If the measurements are exactly 1-1/2 and 1-1/4 inches then the only option we have would be agricultural hub # AH30660FCOMP which has a 6...
    view full answer...

  • Determining Axle Length for Home-made 4 x 8 Trailer Using Square Stub Spindles
  • You can use the 8-3/4-inch overall length of the Redline 1-1/2-inch Spindle # SP204BT8 to help you determine the correct length for your axle tube. You also need to take into account the width of the tires you intend to use as these also will increase the width of the overall combination of the axle, spindle, hub and wheel. Start with the overall width of the trailer and its fenders/wheel wells, subtract the widths of your two chosen wheels and the lengths of the two spindles to determine...
    view full answer...

  • Can Trailer Spindle # SP204BT8 Be Used with Trailer Hub # 34822BX
  • Yes, you can use hub # AKIHUB-440-2-1K with spindle # SP204BT8. These two parts are compatible. Spindles get welded onto the ends of an axle. This is a precision job because it has to be perfectly straight and concentric or the trailer will ride poorly and you will have faster tire wear and faster wear on the suspension. I strongly recommend having a qualified professional with experiencing working on trailers install the spindles. The other option is to get a whole new axle with the...
    view full answer...

  • Identifying Replacement Wheel Bearings for Unknown Hubs on Boat Trailer
  • The easiest way to identify the needed replacement bearing kit is to obtain the reference numbers off the existing bearings. Your best bet would be to clean the existing bearings and closely examine them for the reference numbers. Given the inside diameter you provided, the bearings could be a # LM67048, # 15123 or # 14125A, all of which have a 1.25 inch inside diameter. All three bearings are listed as outer bearings for certain hubs, none of the hubs we offer would use these as both...
    view full answer...

  • How to Determine The Correct Replacement Trailer Hubs by Bearing Numbers or Spindle Size
  • The best way to determine which replacement hubs you need for your trailer would be to remove one of the hubs and retrieve the bearings. Find the numbers stamped into the bearings and with those we will be able to get you the correct hubs. If you are unable to retrieve the bearing numbers, you can take measurements of the spindle. I have included a link to our spindle main page. At the top of the page is a diagram showing all of the measurements we would need to find the correct hubs...
    view full answer...

  • Process for Changing a Damaged Spindle on a Trailer Axle
  • Replacement of a spindle on a trailer axle is best left to a professional installer. This is not a do-it-yourself type of project. We urge you to use a professional welder experienced in axle fabrication. Proper alignment and welding are critical to safe operation of the trailer. Depending on the condition of the axle you may be better served by replacing the entire axle/spindle assembly. Although the axle adds to the parts cost, you will save on the labor side. A new axle with spindles...
    view full answer...

  • How Much of a Spindle Shaft Needs to Be Inside the Axle Beam
  • The more of the spindle shaft you can get in an axle beam the better. There isn't really a minimum distance that I could determine for a stub such as # SP204BT8 but you have to consider several factors like the weight capacity of the axle and where the wheels will be relative to the trailer frame for the spindle position. Basically, I recommend having the whole spindle shaft in the axle beam because that is how pre-fabricated axles come such as # T3584F-EZ-8974 for example.
    view full answer...

  • Spindle and Hub Combination to Fit 4.80 X 12 Tires and Wheels on a BBQ Grill Build
  • When manufacturing axles for a wagon/trailer you will need to measure the inside of the square tube that you will be using for the axle. Once you know this measurement then you can pick the correct spindles and idler hubs. One spindle that would work well for your build would be Redline 1-1/2 Inch Square X 4 Inch Spindle # SP204BT8. This spindle has a square mount shank that will fit an 1-1/2 square tube. This spindle will have to be welded to the axle. It is recommend that this be done...
    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...

  • 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...

  • Recommended Stub Axle Wheel And Tires For 200 lb Restroom Trailers
  • For your restroom trailer stub axle and wheel/tire kit request, I recommend the Redline Spindle 1-1/2" Square x 4" Long Stub, for 2,000 lb. Trailer Axles # SP204BT8. This will give you a flat surface for welding. For the hub assemblies, I recommend the Trailer Idler Hub Assembly for 2,000-lb Axles - 4 on 4 # AKIHUB-440-2-1K. This assembly includes the bearings, races, seal, and grease cap. You will also want grease like # L11465. For your wheels, I recommend the Kenda 4.80/4.00-8 Bias...
    view full answer...

  • How to Pick Out an Axle for a 6 x 12 Utility Trailer
  • Basically you will want to measure your trailer to determine where you will want the wheels of it to be so that you can pick out the correct length axle. There is not a set length of axle that a 6 x 12 trailer should take so you will have to determine about where you want the wheels to be and then measure the distance between where the mounting flange of the rims would be. The only size 3,500 lb axle we carry is the part # 35545I-EZ-89 which will have a distance of 89 inches from hub...
    view full answer...

  • Trailer Spindle Got a Nick In it from a Grinder Should the Axle be Replaced
  • How deep is it? It is hard to tell from the picture. You may be able to use some emery cloth and take care of it unless it is too deep. Then you would want to go ahead and replace the axle. Even though spindles are available by themselves you would need special equipment and experience to weld on a new one so that it is straight. Replacing the axle is the safe bet. I have included a link to the axles we carry to the right.
    view full answer...

  • Can a Trailer Spindle with Grooves Still be Used if Bearing Fits
  • You will have to replace the spindle. Grooves that can't be taken out with emory cloth will eventually cause new bearings to fail which will leave you stranded with a locked up wheel most likely. 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...
    view full answer...

  • Recommended Replacement Axle For Homemade Trailer
  • My recommendation is to replace the entire axle. That way you would not have any issues with replacement hubs, bearings, races, and other components you need for your trailer. I have attached a link to our product page for the axles we offer with idler hubs. You would need to measure your trailer to find the correct size axle. If you find you can use a 60 inch axle measured hub face to hub face I recommend part # 20440I-EZ-60. This includes the idler hubs with bearings, races, and seals....
    view full answer...

  • Availability of 1 Inch Diameter Trailer Spindle To Fit on 1.25 Square Axle
  • The two spindles that I have to fit a square axle are designed with a square stub diameter of 1.50 inches. The Redline Spindle, part # SP204BT8, you have referenced is for 2,000-lb axles and the Redline Spindle, part # SP20484, is for 3,500-lb axles. They use different bearings and seals. I am including a link to a product page that will list the dimensions on the trailer spindles we have available. Square axles can be tough to determine capacity. Often times the same spindle fits...
    view full answer...

  • How to Determine Spindle Size for a 2004 Triton Elite WCII PWC Trailer
  • There are two ways to determine what spindle you have on your 2004 Triton Elite WCII Jet-Ski trailer. The first way is to look at the number that is stamped on the bearings that you removed when you took the hub off. The second way is to use a dial caliper and get the measurements and find the spindle that matches those measurements. The new spindle must be absolutely square with the axle in order to prevent tire wear and wheel tracking problems. I would recommend finding a welder...
    view full answer...

  • How to Check for a Bent Trailer Axle Spindle
  • Assuming your tires are in good shape without any bulges the easiest way to determine if you have a bent spindle is to take a straight edge that is longer than the tire and lay it across the tire parallel with your trailer frame and then measure the distance from the frame to the straight edge in front and back of the tire. If the distance is the same then the spindle isn't bent. Beyond that your best option would be to take the trailer to someone qualified in trailer repair to have...
    view full answer...

  • How to Measure a Trailer Spindle to Determine What Hub Could Replace
  • You are on the right track by measuring dimensions of the spindle with a dial caliper, but to determine which hub could potentially fit your spindle you need to measure it where the bearings and seal rides. See pic to see where to measure. If you can get back to me with that info I will be able to determine if there is a hub that could fit.
    view full answer...

  • Do Trailer Bearings Fit Tight To the Spindle they Install On
  • Bearings fit pretty tight onto spindles. There basically should be no play at all between the inner portion of the bearing and the spindle. They don't fit so tight that they would have to be pressed on, but they sometimes can be tight enough that they require a bit of effort to get them totally slid on. Check out the install video I attached for more info on how bearings install.
    view full answer...

  • Can Damaged Axle on 1999 Shorelander Boat Trailer Be Sanded Smooth
  • In all honesty, you're almost certainly going to be best off by replacing the axle. The spindles are likely gouged in the locations where the bearings ride. The act of sanding out the damaged area of the spindle has likely removed some material to the point where the spindle is no longer within its diameter specifications. This means the bearing won't fit well on the spindle, and might spin against the spindle which can cause it to heat up to the point where it could be damaged. We...
    view full answer...

  • Does Trailer Hub Assembly for 2,000 Pound Axles Include Bearings and What Spindle Will Fit
  • The inner and outer bearings, races, seals and cap are all included. We carry three spindles that will fit this hub. The differences is the shanks that are to be welded to the axle, but the machined portions will fit the hub assembly you were looking at. The spindles are part # R104BT8, part # R104BT8-38, and part # SP204BT8.
    view full answer...

  • Trailer Spindle that Works with BT100 Hubs
  • For your hub that uses L44643 bearings you can use one of 3 spindles: # R104BT8 # R104BT8-38 # SP204BT8 I have included links to video reviews of each of these spindles for you. If your bearings do not have L44643 stamped into them let me know what they are and I can see if there is a spindle that will work with them.
    view full answer...

  • Why Are There Both Round and Square Trailer Axles Used on RVs
  • Most of the OEM axles installed in RVs and most of the replacement axles we offer are indeed round in cross section. We do offer some square stub spindles for use on square axles, such as # SP204BT8, but these are usually limited to lower capacities like utility trailer applications. We do not have the ability to ship high-capacity axles due to their weight.
    view full answer...

  • Could a Hub Get Replaced on the Side of the Highway
  • Spindles get welded to axles so there really is not an easy way to replace one on the side of a highway. The best advice I could give to you would be to periodically check the condition of the bearings on your trailer and be sure to grease them regularly and you should have a pretty reliable trailer setup. If you had a replacement hub in your vehicle you could pretty easily swap one if needed. Check out the video I attached on bearing inspection for you.
    view full answer...

  • How to Use an 18 Inch Diameter Wheel on a Trailer
  • I understand the look of using the same tire on the trailer as the tow vehicle but there are not going to be any performance benefits. In fact, using a passenger tire on a trailer is actually going to give you less performance than using a special trailer tire. The issue is that passenger tires do not have the sidewall capacity that is needed for use on a trailer. Trailer tires are going to experience much more flex than a passenger tire so the sidewalls need to be much stronger. I can't...
    view full answer...

  • Replacement Spindle With Bearings L44643 for Square Axle
  • Since you have a pair of # L44643 bearings and a square axle, the right replacement spindle for you would be # SP204BT8. It is recommended that replacement spindles be welded on by a qualified welder, preferably one experienced with trailer axles. Also, if you are looking to replace your bearings, races and grease seal, you would need Bearing Kit # BK1-100. I've added links to review videos on the spindle and bearing kit for you to take a look at.
    view full answer...

  • New Spindles, Hubs, Tires, and Wheels for a Canoga Concrete Mixer/Trailer
  • The LM67048 is a pretty large bearing for a trailer that only weighs 400 pounds. So there isn't a hub that uses that bearing as both the inner and the outer. But if you are willing to remove the old spindles and have new ones welded on then I do have a solution for you. First for the spindles: I recommend a BT8 spindle # SP204BT8 for a square stub or # R104BT8 for a round stub. These spindles are usually found on 2,000 pound axles so they have plenty of capacity for your cement mixer...
    view full answer...


Do you have a question about this Trailer Spindle?




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