1. Trailer Leaf Spring Suspension
  2. Redline
  3. U-Bolt Kits
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  5. Round Axle - 1-3/4 Inch
  6. 4-1/4 Inch Long
U-Bolt Kit for Mounting 2,000-lb, Round Trailer Axles - 4-1/4" Long U-Bolts

U-Bolt Kit for Mounting 2,000-lb, Round Trailer Axles - 4-1/4" Long U-Bolts

Item # APUBR-10
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Trailer Leaf Spring Suspension
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Trailer Leaf Spring Suspension APUBR-10 - U-Bolt Kits - Redline
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Mount your round, 1-3/4" diameter axle to your trailer's leaf springs with this U-bolt kit. U-bolts, plates and nuts included. Lowest Prices for the best trailer leaf spring suspension from Redline. U-Bolt Kit for Mounting 2,000-lb, Round Trailer Axles - 4-1/4" Long U-Bolts part number APUBR-10 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Redline Trailer Leaf Spring Suspension - APUBR-10

  • U-Bolt Kits
  • Axle Mounting Hardware
  • Round Axle - 1-3/4 Inch
  • 4-1/4 Inch Long
  • 2000 lbs
  • 3/8 Inch Diameter
  • Redline

Mount your round, 1-3/4" diameter axle to your trailer's leaf springs with this U-bolt kit. U-bolts, plates and nuts included.


Features:

  • Attaches trailer axle to leaf springs
  • Includes:
    • (4) 4-1/4" Long U-bolts (175643)
    • (2) U-Bolt plates for 1-3/4" springs (117535)
    • (8) 3/8"-24 Hex nuts (38N)
  • Spring seats required for mounting axle to leaf spring sold separately


Specs:

  • Axle diameter: 1-3/4"
    • Typical 2,000-lb axle
  • Spring width: 1-3/4"
  • Dimensions: see below


U-Bolt Diagram



APUBR-10 U-Bolt Kit for 2,000-lb Round Trailer Axles





Video of U-Bolt Kit for Mounting 2,000-lb, Round Trailer Axles - 4-1/4" Long U-Bolts

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




Video Transcript for Redline Round Trailer Axle U-Bolt Mounting Kit Review


Customer Reviews

U-Bolt Kit for Mounting 2,000-lb, Round Trailer Axles - 4-1/4" Long U-Bolts - APUBR-10

Average Customer Rating:  4.8 out of 5 stars   (209 Customer Reviews)

Mount your round, 1-3/4" diameter axle to your trailer's leaf springs with this U-bolt kit. U-bolts, plates and nuts included.

- APUBR-10
by:

this ujoint kit appears to be complete however the spring seat is not a kit and only comes with just the one. So you need to know to order 2. this is has cause me a delay since I had to order another. The info should be there to warn the buyer they need a quantity of two or come with two if it's sold as a kit like item APUBR-10 ---the ubolts. 633208


Comments
As stated in the product description, the spring seats are sold separately.
-- Mike L - 04/22/2019

54285

- APUBR-10
by:

872768



- APUBR-10
by:

Had broken rear boat trailer spring, serious list to port in my driveway. ordered new pair. Just finished installing. They fit like a glove. Good Product . Darn quick delivery. 870452



- APUBR-10
by:

Delivery is always on time or early. 867934



- APUBR-10
by:

867518



- APUBR-10
by: 08/16/2020

863199



- APUBR-10
by:

I am very pleased with in the way my order was handled along with my return. Very grateful for the help Noah and all the employee the handled my order. I will be recommending etrailer to any one I hear of needing trailer parts. Thank you 854738



- APUBR-10
by:

Product fit just fine and serves its purpose. Be prepared to have to cut off and replace all of the old bolts. The bolts, by the way, are probably special hardened bolts so shop carefully. 850679



- APUBR-10
by:

Product was exactly as described and just what I needed. Delivered in a timely manner. Thank you!! 848940



- APUBR-10
by:

Great website, easy order, quick shippi ng 848518



- APUBR-10
by:

etrailer tries to get the order out as soon as they can, but on my last order UPS sit on the order in Creston Iowa for 3 days before they handed it over to USPS to be delivered. I realize etrailer has no control what happens to the order after they send it, but as far as the etrailer company is concerned they are a great company and I'll be buying more stuff from them in the future. 824609



- APUBR-10
by:

Worked great was long enough and the plate holes lined up. 816316



- APUBR-10
by:

purchased the new U bolts and plates and they fit exactly the way they should off and I like that the product was of good quality. some times its hard to fine U bolts that are the right fit but these fit to a tee. I would recommend etrailer to every one that is looking for new hardware for their trailer. I wont shop any where else from here on out. 812100



- APUBR-10
by:

All the products I needed to get my utility trailer back on the road. 816152



- APUBR-10
by:

Great product! Fit perfectly! 815540



- APUBR-10
by:

All products were delivered promptly and were as expected. I already completed half of the trailer leaf spring replacements (one side) and will wrap-up tonight. All is going well, and I appreciate that the product descriptions on etrailer's website were very detailed (dimension, how to measure) such that I had confidence that I was ordering just what I needed. Great products and service. 811393



- APUBR-10
by:

Good quality axle assembly. Went together great. It’s nice that etrailer has info on web site with dimensions. It would be really nice if they had downloadable dfx or AutoCAD drawings available since I do all of my design I. AutoCAD. 807316



- APUBR-10
by:

I bought these a while back but just got around to installing them. I replaced the springs, hangers and shackles on my old boat trailer. I got them all together with genders. 803676



- APUBR-10
by:

Product was exactly as described and has held up well for the year I’ve owned it. Customers service, shipping, everything was on point. If I have trailer needs in the future I’ll definitely be shopping here. 804588



- APUBR-10
by:

The parts fit great easy to put on fast shipping very good video to help you 100% very good products 798919



- APUBR-10
by:

Great u-bolts. Too notch 798888



- APUBR-10
by:

I had an 81 popup trailer i wanted to do an axle flip on. Found the parts here under 30 bux. Exact hardware as original and big beefy steel spring perches for welding to the axle. Highly recommend as im highly satisfied. 795821



- APUBR-10
by:

Axle and all parts still holding up! 794815



- APUBR-10
by:

Very nice correspondence and fast shipping Awesome to work with. 791961



- APUBR-10
by:

They came as pictured. They even fit to gether. 785774


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Show More Reviews

Ask the Experts about this Redline Trailer Leaf Spring Suspension

  • Can an Axle Over Under Kit be Made for 1-3/4 inch Trailer Axle
    If you are okay with removing the fenders or going to a larger one that would probably be your simplest route and the way I would go if I were you. We don't have an axle over under kit for your axle size, but we could piece together one if you like. All you would need for an over-under kit for a 1-3/4 inch round axle would be the U-bolt kit part # APUBR-10 and the spring seat part # TRSS175. You would need two of the spring seats. Then for a 14 inch wheel and tire we have the part...
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  • Changed Trailer Deck From Steel to Wood Now Tires Rub Fenders When Towing A Load
    We carry over-under conversion kits that fit both a 2-3/8 and 3 inch axles. However, we do not offer a kit that will fit a 2,000 lbs axle, but we can put together a conversion kit for you that will work with your axle. You will need U-Bolt Kit for Mounting 2,000-lb, Round Trailer Axles, # APUBR-10 and 2 of Spring Seat, # TRSS175, for 2,000 lbs with 1-3/4 inch diameter. You will place a spring seat on the top of the axle to provide a place for your leaf spring to sit. The new spring...
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  • Axle Flip Kit for a 1,000 Lb to 2,000 Lb Trailer Axle 1-3/4 Inch Diameter
    I have a solution that will allow you to flip your axle but there is not an all-inclusive kit for your axle size so we will need to piece together one. I assume you have a 1-3/4" diameter axle (1,000 lb - 2,000 lb) so that means you will need the U-Bolt Kit part # APUBR-10 and the Spring Seat part # TRSS175 (2). These u-bolts are 4-1/4" which is the longest we have for this width. However, I would highly doubt that you will require a 6" long u-bolt as most leaf springs are only 3/8" thick....
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  • What Torque Should Be Used For U-Bolt Nuts On Trailer Suspension
    If the U-bolts are 9/16 inch diameter, the torque specs should be between 65 to 95 foot lbs. If the U-bolts are 3/8 inch diameter, the torque should be between 30 and 50 foot lbs.
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  • Replacement Parts for Long Chih Industrial LCI-850T Folding Utility Trailer
    The website for Taiwanese trailer maker Long Chih Industrial does not provide any specs or construction details for their LCI-850T folding utility trailer so I cannot tell you which parts you will need to complete assembly. However, we do offer all sorts of trailer hardware like u-bolt kit # APUBR-10 as well as other individual parts you can see on the linked page.
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  • Can Trailer Leaf Springs be Moved from Below the Axle to the Top of the Axle
    Some trailers have the leaf spring stack above the axle and some have it underneath. You can move the stack to the top of the axle but you will have to weld on new spring seats to the top of the axle. Use # TRSS175 for a 1-3/4 inch round axle. It will raise the height of the trailer some but you need to be aware that it also raises the center of gravity. That makes the trailer more susceptible to sway.
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  • Is Trailer Suspension U-Bolt Plate Supposed to Bend and What is Torque Spec for 3/8" U-Bolts
    Trailer suspension U-bolt plates can bend, yes, so it doesn't sound like you have anything to worry about. For 3/8 inch nuts on the U-bolts in kit # APUBR-10 they should be torqued between 30 and 50 foot pounds according to Dexter Axle.
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  • Possible Solution for Bent A-Frame Trailer Due to Swivel Jack
    The frame members of a trailer really aren't replaceable. Your best option will be to take the trailer (carefully) to a fabricator to see if they weld in a new section of frame there. You should also have them go over the trailer to make sure there aren't any other structural issues that need addressing as well. Also be sure not to overload the trailer. It looks like it bent where the swivel jack was initially installed. You might have that front section of the trailer reinforced with another...
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  • U-Bolt Suspension Kit for 1-3/4 Inch Diameter Round Trailer Axle
    U-bolt kit # APUBR-10 is the only one we carry that fits a 1-3/4 inch diameter trailer axle. You would have to change the springs to 1-3/4 inch wide springs to use this kit. A larger u-bolt kit would not work because it can cause damage. To determine if we have springs that will work for your trailer I will need to know the type of springs you have, double-eye or slipper springs, and the measurements. A 1-3/4 inch diameter axle likely has a 2,000 pound capacity so we would be looking...
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  • Axle Flip Kit to Lower Trailer with 2,000 Pound Axle
    We recommend having at least 4 inches of clearance between the top of the tire tread and your fender or trailer floor to account for suspension travel. If the leaf springs are currently over the axle on your trailer and you want to move them below it to lower the trailer then you will just need a U-bolt kit and new spring seats. You will want to verify this but most likely your 2,000 pound round axle features a 1-3/4 inch diameter. For this the U-Bolt Kit # APUBR-10 and the TruRyde Spring...
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  • Parts Required to do Over/Under Conversion on 1-3/4 Axle on Tractor Supply Trailer
    From what I was able to determine the Tractor Supply trailer you have likely has a 2000-lbs axle on it, which has a 1-3/4" diameter axle. There isn't a specific over/under conversion kit for that size axle but you can use 2 of the spring seat # TRSS175 and weld them on either end of your axle and then use the # APUBR-10 u-bolts you were looking at to complete the process. It should be noted that you need to have a qualified welder perform the installation of the spring seats.
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  • U-Bolt Kit for 1-3/4" Round Axle
    There is a kit for 1-3/4 inch round axles, the U-Bolt Kit for Mounting 2,000-lb, Round Trailer Axles - 4-1/4" Long U-Bolts # APUBR-10. That said, these are for 2,000 lb axles that are found on RVs instead of a mobile home axle. The reason for that is mobile home axles are designed for a one-time use so people don't change the suspension. I have added a link to a video review of this kit for you to check out as well.
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  • Availability of 3/8-Inch Diameter U-Bolts that Measure 4-inches x 3-1/2-inches
    We do offer several different u-bolts and axle kits with 3/8-inch diameter and all of these can be seen on the link at right. One such example is part # APUBR-10 which is a kit with 4 u-bolts, plates and nuts. None of these has the exact dimensions you quoted, please note. A second link will let you see all u-bolts we offer and the filters in the left-hand margin will let you sort the results based on length.
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  • Spring Hanger and Axle Diameter Measurements for Installing Leaf Springs on Single Axle Trailer
    In the attached diagram the A measurement is actually the distance from the center of the spring hangers for a single axle trailer. The spring eye to spring eye measurement for your leaf springs will be slightly different. The B measurement that you see is simply the distance between the center of the axle and trailer frame. I have attached another diagram from the Single-Axle Trailer Hanger Kit for Double-Eye Springs # APS3 product page to help demonstrate this. If you have an axle...
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  • Recommended Slipper Spring for Custom Kayak Trailer
    Thanks for the photos with measurements. The 2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long # SP-177275 are rated for 500lbs each for use with a 1000K axle. This will work with the inside to inside measurement you are seeking. You will simply need the 9/16 inch bolt # 166079. If there is any extra space in the hanger it won't be an issue with the bolt and bushing.
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  • Hub, Leaf Spring, and U-Bolt Kit for 2,000 lb Trailer Axle
    The Dexter Trailer Axle w/ Idler Hubs # 20545I-EZ-72-15 is designed to fit 2,000 lb trailer axles. If that's what you have then this will fit and the U-bolt kit part # APUBR-10 that you referenced would also work since that's what it's designed to fit. The leaf spring part # SP-169275 is also a 2k axle spring but you'll want to make sure the length matches what you need too. This has an overall lenght of 20-3/8 inch.
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  • Upgrading The Axle On A Harbor Freight 48"x 96 Trailer
    To determine fit, the width of your trailer should be the same as the spring seat center to center measurement on the axle (48 inches). The # T20BTR-6048 lines up fine there. If these bearings fit your hubs, inner bearing L44649 and outer bearing L44649 would be compatible with this axle. The hubs on this axle should accommodate 12 inch wheels with a 4 on 4 bolt pattern. I would go ahead and replace the u bolts to prevent any potential thread misalignment. The U-Bolt Kit for Mounting...
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  • Is There An Axle Flip Kit for a 2,000 Lb 1-3/4 Inch Diameter Axle
    I do have all of the components you will need to flip the axle on your tent trailer but there is not an all inclusive kit per se to do so. However, the kits are pretty basic as all they include are u-bolts, tie plates, and spring seats. For your 1-3/4" diameter axle, I recommend using the U-Bolt Kit part # APUBR-10 with the Spring Seat part # TRSS175 (2). The only difference between these two parts and a kit like the Dexter Trailer Springs Over-Under Conversion Kit is that the spring seats...
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  • Parts Needed to Flip Axle on a Pop up Camper
    I have exactly what you need, but it will have to come in the form of a couple parts pieced together because an over-under conversion kit or "axle flip kit" as some people call it isn't available for the smaller 1-3/4 inch round axles. To move your leaf springs above your axles, you will want the following parts: Qty 2 - Spring Seats # TRSS175 Qty 1 - U-Bolt Kit # APUBR-10 The spring seats will be welded to the opposite side of the axle as the current spring seats. You may not need...
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  • Replacement Trailer Axle for a 5x10 Utility Trailer
    Unfortunately, we do not have any hubs that match the dimensions you provided. The only other option I have for you at this time would be to replace the axle. If you can provide me with the hub face to hub face and spring center to spring center measurement, I can go about trying to find a replacement axle for you.
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  • Replacement Trailer Suspension Components
    In a typical leaf spring trailer suspension a spring seat like # TRSS300 is welded to the axle but the u-bolt plate is not. The u-bolt plates are bolted around the axle and leaf spring and these hold the spring in place on the spring seat and to the axle, as noted on your photo. You can also refer to the linked article on slipper spring suspensions for more on the details of how these parts work together and on how to measure. You'll want to completely remove one spring from the suspension...
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  • Will Slipper Springs be Installed Above or Below New Dexter Axle
    If you are installing the Dexter Idler Trailer Axle w/ Hubs # 20545I-EZ-60-10 with the U-Bolt Kit # APUBR-10 on your Harbor Freight trailer you will install the slipper springs, either # SP-039275 or # SP-179275, below the axle like in the linked installation video. This axle will work as a replacement, though I do recommend verifying your current axle has the same 48" spring-center-to-spring-center length and 60" hub-face-to-hub-face length.
    view full answer...
  • What Is Needed To Replace An Old Axle With A New Axle
    The Dexter Trailer Idler Axle Kit, Item # 20440I-EZ-60, includes most of what you need to complete the axle change and installation. It has a 2,200-lbs weight capacity and is fairly easy install (see attached video). I also encourage you to double-check your measurements to make sure you are getting the right kit for you and your trailer. This Dexter kit will include a straight trailer axle that measures 60 inches from hub face to hub face and 48 inches from spring center to spring...
    view full answer...
  • Correct Spring Seat and U-Bolt Kit for my 1-3/4" Round 2,000 lb. Axle
    The Spring Seat for Typical 2,000-lb, Round Trailer Axles with 1-3/4" Diameter part # TRSS175 are confirmed to work with the U-Bolt Kit for Mounting 2,000-lb, Round Trailer Axles part # APUBR-10. The U-bolts are always slightly wider at the mouth than at the bend and they all fit together really well.
    view full answer...
  • Converting Tandem to Single Axle Boat Trailer
    The Dexter Trailer Idler Axle w/ Hubs part # 20545I-EZ-72-10 does not come with leaf springs but we do have the correct ones for you as well as the leaf spring hangers, shackle straps, u-bolts, and everything else you need to convert to a single axle. For the leaf spring, I recommend using the 3-Leaf Double-Eye Spring part # SP-219275. For the suspension kit, I recommend the Single-Axle Trailer Hanger Kit for Double-Eye Springs part # APS4. For the u-bolt kit, I recommend the U-Bolt Kit...
    view full answer...
  • Hanger, Leaf Spring, and U-Bolt Kit Recommendation for Dexter Axle # 20545I-EZ-60-15
    The Dexter axle part # 20545I-EZ-60-15 is a 2,200 lb axle so for springs you'd want the 2,500 lb spring part # SP-219275 which is the closest we offer to a 2,200 lb axle spring. Then for a u-bolt kit you'd want the part # APUBR-10. The part # APS4 would be a great single axle kit to use as well.
    view full answer...

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Info for this part was:

Expert Research:
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Video Edited:
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Video Edited:
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Installed by:
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Installed by:
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Video by:
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