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#42 E-Z Lube Spindle w/ Flange for 5.2K to 7K Trailer Axles - 2-1/4" Diameter

#42 E-Z Lube Spindle w/ Flange for 5.2K to 7K Trailer Axles - 2-1/4" Diameter

Item # TRU37FR
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#42 E-Z Lube Spindle w/ Flange for 5.2K to 7K Trailer Axles - 2-1/4" Diameter Round TRU37FR
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Replacement #42 E-Z Lube spindle welds onto your 5,200-lb to 7,000-lb trailer axle. Works with 25580 inner bearing and outer bearings with 1.25" inner diameter. Grease zerk makes greasing easy. Flange lets you attach a brake assembly. Lowest Prices for the best trailer spindles from TruRyde. #42 E-Z Lube Spindle w/ Flange for 5.2K to 7K Trailer Axles - 2-1/4" Diameter part number TRU37FR can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (2)
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TruRyde Trailer Spindles - TRU37FR

  • For 5000 lb Axle
  • For 6000 lb Axle
  • For 7000 lb Axle
  • EZ Lube Spindle
  • 2-1/4 Inch Diameter
  • Round
  • TruRyde

Replacement #42 E-Z Lube spindle welds onto your 5,200-lb to 7,000-lb trailer axle. Works with 25580 inner bearing and outer bearings with 1.25" inner diameter. Grease zerk makes greasing easy. Flange lets you attach a brake assembly.


  • Straight spindle replaces a worn or damaged #42 E-Z Lube spindle on your trailer
    • Can also be used to build a custom axle
  • Integrated zerk makes greasing your bearings easy
  • Mounting flange lets you bolt on a brake assembly
  • Weld-on installation
  • Sturdy steel construction
  • Castle nut, washer, and cotter pin included


  • Application: 5,200-lb - 7,000-lb trailer axles
  • Stub diameter: 2-1/4"
  • Spindle capacity: 3,500 lbs
  • Overall spindle length: 11"
  • Brake flange configuration: 5 bolt

Bearing, Race, and Seal Information

  • Bearings (sold separately)
    • Inner bearing: 25580 (1.75" inner diameter)
    • Outer bearing: varies depending on hub capacity (1.25" inner diameter)
  • Races (sold separately)
    • Inner race: 25520
    • Outer race: varies depending on outer bearing
  • Grease seal (sold separately): GS-2250DL
    • Inner diameter: 2.25"
    • Outer diameter: 3.376"

SP-22542FZNWC TruRyde (TRP) Replacement EZ Lube #42 Spindle for 5.2K - 7K Axles - Brake Mounting Flange - 2.25" Diameter x 11" OAL

Replaces R50342EZ

Customer Reviews

#42 E-Z Lube Spindle w/ Flange for 5.2K to 7K Trailer Axles - 2-1/4" Diameter - TRU37FR

Average Customer Rating:  5.0 out of 5 stars   (2 Customer Reviews)

Replacement #42 E-Z Lube spindle welds onto your 5,200-lb to 7,000-lb trailer axle. Works with 25580 inner bearing and outer bearings with 1.25" inner diameter. Grease zerk makes greasing easy. Flange lets you attach a brake assembly.




Got on time and good price 875985


Ask the Experts about this TruRyde Trailer Spindles

  • Availability of Spindle and Hubs for 10,000 lb Trailer Axle
    As you may have noticed, the highest capacity spindle we carry is for a 7,000 lb axle, # TRU37FR. Your best bet is to source the spindles for a 10,000 lb axle through a local trailer shop or dealer. If are able to source the spindles, we do have hubs for 10,000 lb axles. I'll list them below: # 8-430-5UC3 - Dexter Hub Drum for 9K to 10K axles manufactured after July 2009 (for non ABS brakes) - uses inner bearing # 387A, outer bearing # 25580 and oil seal # 10-51 # K08-288-90 -...
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  • Dimensions of TRU37FR Replacement E-Z Lube Spindle
    If you take a look at the provided photo, you can see the pertinent dimensions of the # TRU37FR spindle.
    view full answer...
  • Wheels, Spindle, and Hubs for Making Hay Unroller for Round Bales
    You'll want a wheel and tire setup like the part # WST94FR which has off-road tires for your application so to build the setup around that you'd want a hub like the # 8-213-5UC1-EZ and then a spindle like the # TRU37FR that you referenced. This setup has about 4 times the weight capacity you'd need in terms of on-road weight capacity which should be fine for what you are doing.
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  • How To Determine the Weight Capacity For a Trailer Axle with Spindle Dimensions that Match 42
    A trailer as old as yours would be pretty hard to determine an overall capacity for, but since you have 6 lug hubs that would indicate by todays standards you have a capacity most likely between 5,200 and 6k which matches pretty close to the spindle dimensions you listed as well. The spindle dimensions match the 42 spindle like the part # TRU37FR which has a 5,200 lb capacity.
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  • How To Remove Spindles From Trailer Axle
    Trailer spindles are welded directly to the axle so to remove one it just needs to be cut off completely using a torch or saw. Then to replace the spindle such as with the EZ Lube # TRU37FR that you were looking at it's extremely important that it be done by a certified welder who is experienced with this type of job. It has to be welded perfectly square to the axle or you're going to have constant problems with the trailer's suspension once everything else is put into place. Because...
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  • How to Construct Custom Axle for Scratch-Built Trailer Using Spindle # TRU37FR
    First, I wish you good luck with your build project. No one eats without our farmers! Do please note that DOT regulations limit trailers to a width of no more than 103-inches for on-road use. If your trailer will see only agro use and never go on road this is not a concern, but do please keep this in mind if there is any chance the trailer will need to be pulled on public roads. You could be fined for pulling an oversize trailer without first obtaining the required permits. If your...
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  • Correct Spindle Size for 2008 Triton Boat Trailer
    I did some research on a 2008 Triton Boat Trailer and there are various types of boat trailers under this brand, so it is difficult to determine a compatible spindle. In order to determine what type of spindle your trailer has, you can take a few measurements. I have attached an image that shows the measurements to take as well as how to determine the compatible bearings, races and grease seals. I have also included a link that takes you to our available selection of spindles.
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  • Spindle With Same Dimensions as TRU37FR That Does not Have EZ Lube or Flange
    There is the same spindle as # TRU37FR but is not EZ Lube and does not have a brake flange. What you are seeking is spindle # TRU57FR which is otherwise the same; I've added a link to a video review of this spindle for you to take a look at.
    view full answer...
  • Replacement Spindle Recommendation for Dexter # 42
    Looks like you are in need of a number 42 spindle like the part # TRU37FR. The numbers you listed aren't part numbers but judging by the shape of what you sent in a picture of this is a match. You still might verify this though by measuring where the bearings ride. If those dimensions are 1.25 and 1.74 inch then this is the correct.
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  • Can Spindles be Replaced on Dexter Torflex Axle
    The spindles can be replaced. However, they will need to be welded by a certified welder. They use special jigs so that it is concentric and square on the axle or it can cause problems with uneven tire wear and wheel tracking. I've linked our selection of spindles for your to find the correct part for your trailer.
    view full answer...
  • Could Bent RV Tire Spindle Cause Trailer Sway
    Thank you for the photo of your trailer tire. I cannot tell for sure from the photo but if you suspect that you could have a bent spindle on at least that one wheel and you are experiencing sway from the trailer at highway speed despite using a weight distribution/sway control hitch then I urge you to take the trailer to a shop that can check the condition of the axle and spindles. It is certainly possible that a good hit from road debris (or from a curb that was closer than you thought)...
    view full answer...
  • Hub And Bearing Replacement For A 5,200 LBS. Mobile Home Axle
    I do have a hub and bearing assembly that will allow you to replace the hubs on your mobile home axle however, mobile home axles are intended for a one time single use only, therefore there is a limitation to readily available replacement parts. When changing the hubs and bearing on a mobile home axle it is important to note the condition of the spindle. A discoloration or nicks/scarring on the spindle are a good sign of needing a replacement. Installing new parts on a damaged spindle...
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  • Installing Spindles on a Home Made Trailer without an Axle Tube
    The EZ Lube Spindle # TRU37FR that you mentioned is to be welded onto an axle tube. If you were to install it directly to your trailer frame the capacity would be greatly reduced not to mention unknown. Also, the ride with no suspension would be extremely rough. If you're looking for an option that doesn't require an axle tube we have the Timbren Axle-Less Suspension System # ASR5200S01. This has a 5,200 pound capacity, like the spindle you referenced when you use two of them. It...
    view full answer...
  • Who Can Replace Trailer Axle Spindle
    Trailer spindles should only be installed by a qualified fabricator with trailer axle experience who has the necessary equipment to square up a trailer spindle. It's not a project for someone who's pretty good at welding since if the spindle is off by just a little bit you will have all sorts of alignment issues.
    view full answer...
  • How to Pick Out Axle Capacity for Smaller Trailer
    You are on the right track for determining the correct axle capacity. Basically it's just the weight of the trailer plus the weight of the cargo you'd carry in it as the minimum capacity you'd need. So 1,200 would be the minimum you'd need based on what you listed. I'd go with a 2,000 lb axle though since that is the most common lower capacity size. You are going to need to measure your current axles in a few places to get the correct one as we don't have access to what your numbers...
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  • High Capacity Spindle or Axle for Hay Wagon
    I wish we did, but we do not carry any 10k rated trailer spindles. The highest we have is a 7k spindle like part # TRU57FR. This is a standard spindle that could work well on your hay wagon as long as you didn't need more than a 7k capacity. We also carry the hubs compatible like the Trailer Idler Hub Assembly for 7,000-lb Axles - 8 on 6-1/2 - Pre-Greased # AKIHUB-865-7-2-K. If you want the axle and not just the spindles, then I recommend the Dexter Trailer Axle Beam with E-Z Lube Spindles...
    view full answer...
  • Which Hubs Fit the # TRU37FR Spindle
    If you need a 6 lug on 5.5 inch bolt pattern then you will need the following hubs. 8-213-5UC1-EZ 6 on 5.5 Idler Hub Bearings 25880 inner and 15123 outer 8-201-9UC3-EZ 6 on 5.5 Hub and Drum Bearings 25880 inner and 15123 outer If you need a 8 lug on 6.5 inch bolt pattern then you will need the following hubs. 8-231-9UC1-EZ 8 on 6.5 Idler Hub Bearings 25880 inner and 14125A outer 8-219-4UC3-EZ 8 on 6.5 Hub and Drum Bearings 25880 inner and 14125A outer Keep in mind that...
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  • Is Finding Excess Grease On Wheel After greasing EZ Lube Spindles Something To Worry About
    Since you just pumped grease into your EZ lube spindle like the EZ Lube Spindle, Item # TRU37FR, I would not be too concerned. I would clean up the excess grease on the inside of your left wheel and keep tabs on it. Also, make sure using the same type of grease. Normally EZ Lube spindles "take care of themselves" if you carry out routine maintenance like you are doing. If possible, I encourage you to check your grease seal to make sure it is not damaged. If you are having an actual...
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  • Trailer Spindles to Fit Inner Bearing L68149 and Outer Bearing LM67048
    The inner diameter of bearing # L68149 is 1.378 inches and the inner diameter of bearing # LM67048 is 1.250 inches. If you refer to the linked page showing all of our trailer spindles you will note that we do not have one with this particular combination of inner and outer bearing diameters. On the linked chart please refer to columns C and D, which indicate the inner diameters of the inner and outer bearings for each spindle shown. Also, please note that we do not have any hub assemblies...
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  • Length Measurements for EZ Lube Spindle 2.25
    I went out to the warehouse to take some measurements of trailer spindle # TRU37FR for you. The stub is actually 3-3/8 inches from the end to the brake flange. It is 3 inches from the end to where the weld is for the brake flange. The brake flange itself is a hair under 1/4 inches thick. The distance from the flange to the tip of the grease fitting is 7-1/2 inches. But to the end of the threaded part it is 7-1/4 inches. The overall length from tip to tip is approximately 11-1/8...
    view full answer...
  • Availability of High Rated Trailer Spindle
    The highest capacity trailer spindle we offer is the part # TRU37FR which is for 5,200 lb axles. The diameter is 2-1/4 inch. For a hub to fit this spindle we have the part # 8-213-5UC1-EZ which has the same capacity and a 6 on 5-1/2 inch bolt pattern.
    view full answer...
  • Correct Replacement Spindle for Axle with 25580 and LM67048 Bearing
    We do have options like the #42 E-Z Lube Spindle part # TRU37FR which has the correct 25580 and LM67048 bearing combo that you need. In order to confirm fit you will however still need to confirm the axle tube type (round/square) and diameter (if round). If it's a round 3" diameter axle then you will be good to go with the above.
    view full answer...
  • Spindle Recommendation for Fitting Hub with 6 on 5-1/2 inch Bolt Pattern
    The 42 spindle part # TRU37FR that you referenced is compatible with hubs that have 6 on 5-1/2 inch bolt patterns like the # 8-201-5UC3-EZ. If you need brake assemblies as well you'd want the part # AKEBRK-7-SA for a left and right hand side that matches the spindle and hubs.
    view full answer...
  • Troubleshooting Trailer Sway that Is Less Obvious When Trailer is Loaded
    The type of sway you described and the fact it gets slightly better when loaded indicates that you need more tongue weight on your trailer. When a trailer doesn't have tongue weight that's between 10 and 15% of the total trailer weight you'll end up with persistent sway. Other times it can be from having a trailer that's not sitting level. To address this we have a help article I attached to this page that covers how to pick out the correct ball mount.
    view full answer...
  • Replacement Spindle for Premco Tandem Axle Trailer
    Our main page for trailer spindles is linked for you. Since your tandem axle trailer is rated for 9500-lbs it uses either 5000-lb or 5200-lb axles. For a 5K axle we offer # TRU57FR which uses a grease seal with an inner diameter (ID) of 2.24-inches, an inner bearing ID of 1.74-inches and an outer bearing ID of 1.25-inches. For a 5200-lb axle we have E-Z Lube spindle # TRU37FR which has the same seal and bearing surface dimensions. Please refer to the items' linked pages for a...
    view full answer...
  • What Bearings Seals Brakes and Tires to Use for 4400 lb Axels on a 2004 Airstream 30 Feet Long
    I did a little research and found that the National Seal, 442109, has an inner diameter of 2.25 inches and an outer diameter of 3.376 inches. We carry two seals that can be used as a replacement for this seal. If your hubs have greased bearings you should use the TruRyde Grease Seal, item # GS-2250DL, or the TruRyde Grease Seals, item # RG06-070 (pair), which is a double lip seal and if your hubs have oil bath bearings, use Oil seal # 10-63. Your inner bearing should match up with the...
    view full answer...
  • Number 42 Spindle Recommendation for Mounting Trailer Hub for Spare
    If you can get me more info on the hub I can see which spindle it would fit. If you know the bearing numbers of the hub that would work, or there is a casting number on the hub like what Dexter does that would work. Axle capacity of the trailer will work as well.
    view full answer...
  • What Size Axle Does the Spindle part # TRU37FR Fit
    The TruRyde spindle part # TRU37FR that you referenced is designed for 5,200 lb axles. That capacity of axle has a diameter of 3 inches externally. Spindles aren't designed to just slip into an axle as a replacement. 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...
    view full answer...
  • Will EZ Lube Spindle, # TRU37FR Fit The Dexter Trailer Hub Assembly, # 8-201-9UC3-EZ
    The EZ Lube Spindle, # TRU37FR will fit the Dexter Trailer Hub Assembly - 5200 & 6000 lbs - 6 on 5-1/2 - EZ Lube, # 8-201-9UC3-EZ. The trailer hub assembly is a 6 on 5-1/2 inch bolt pattern and is rated at 3,000 lbs. per assembly, but because the spindle is rated at 2,600 lbs per spindle the spindle will limit the weight capacity on the axle to 5,200 lbs.
    view full answer...
  • Spindle Replacement on 2006 Fleetwood Prowler Camper
    Replacing the spindle on your axle will require cutting the old spindle off and welding a new spindle (see link) in its place. You would need to find a certified welder so that he has the proper tools and welding equipment to make the repair. To figure out which spindle is correct for your trailer you can use the bearing part numbers, both inner and outer, axle weight capacity and the shape and length of the spindle stub on your trailer. The bearing numbers will let you cross reference...
    view full answer...

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Info for this part was:

Expert Research:
Mike L
Expert Research:
Jameson C
Edited by:
Lindsey S
Written by:
Alexander C
Installed by:
Michael B

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