1. Trailer Leaf Spring Suspension
  2. CE Smith
  3. U-Bolt Kits
  4. Axle Mounting Hardware
  5. Round Axle - 2-3/8 Inch
  6. 5-1/2 Inch Long
CE Smith U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts - Zinc

CE Smith U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts - Zinc

Item # CE23002
lowest price pledge
Our Price: $27.87
You Save: 56%
Trailer Leaf Spring Suspension
Orders above $99 qualify for Free Shipping
Shipping Weight: 6 lbs
CE23002 - Round Axle - 2-3/8 Inch CE Smith Axle Mounting Hardware
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

In Use/Installed

Customer Photos

Mount your round, 2-3/8" diameter axle to your trailer's leaf springs with this U-bolt kit. U-bolts, plates, nuts, and washers included. Zinc plating resists rust and corrosion - great for boat trailers. Lowest Prices for the best trailer leaf spring suspension from CE Smith. CE Smith U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts - Zinc part number CE23002 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (59)
  • Q & A (19)
  • Videos (2)
  • Photos
  • Why etrailer?

CE Smith Trailer Leaf Spring Suspension - CE23002

  • U-Bolt Kits
  • Axle Mounting Hardware
  • Round Axle - 2-3/8 Inch
  • 5-1/2 Inch Long
  • 3500 lbs
  • 1/2 Inch Diameter
  • CE Smith

Mount your round, 2-3/8" diameter axle to your trailer's leaf springs with this U-bolt kit. U-bolts, plates, nuts, and washers included. Zinc plating resists rust and corrosion - great for boat trailers.


  • Mounting kit attaches trailer axle to leaf springs
  • Galvanized plates and zinc-plated hardware resists rust and corrosion
  • Includes:
    • 4 U-bolts
    • 2 U-bolt plates for 1-3/4" springs
    • (8) 1/2" Hex nuts and washers
  • Spring seats (sold separately) required for mounting axle to leaf spring
  • Made in the USA


  • Application: 2-3/8" diameter axle
    • Typical 3,500-lb axle
  • U-bolt dimensions
    • Inner width: 2-7/16"
    • Length: 5-1/2"
    • Diameter: 1/2"

23002 CE Smith U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts - Zinc

Video of CE Smith U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts - Zinc

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

Video Transcript for CE Smith U-Bolt Kit for Round Trailer Axles Review

Speaker 1: Today, we'll be having a look at the CE Smith line of U-bolt mounting kits for mounting round trailer axles. Here's what our kit comes with. It's everything you need for replacing the U-bolts on a single axle on your trailer. We have 4 new U-bolts, you'll have 2 per side; 2 new plates, 1 per side; 8 new lock washers, you'll be using 4 for each side of the trailer; and 8 new nuts, again 4 for each side of the trailer.You can see how well our U-bolts grip around the contours of our axle. This'll keep the axle firmly attached to our leaf springs, so we don't have to worry about it slipping and sliding.Now because we have the zinc and the galvanized finish on our plate and our hardware, this will better protect them from corrosion from the elements, especially salt spray. It's not an issue if you decide to use them on a boat trailer such as this one.Now many of our customers have had to make a second phone call or send an email to us after they bought a new axle for their trailer because they found, once they tried to remove the old one or put the new one on, that they couldn't get their factory U-bolts off.

They had to cut them off, and now they're searching for a replacement. This kit will be a perfect solution for this problem here.Now many of our customers compared these to the Redline line of U-bolt kits. Now the main difference you're going to see between this one and those is that those do not have the galvanized or the zinc finish on the plates or the hardware, which will cause them to rust out faster.As you can see, we already have our new axle sitting on top of our leaf springs. Now this kit could work for an axle that sits on top or below your leaf springs. It works for both applications.

You don't need to worry if yours resides below, you can still use this kit for that.We'll start by taking our new U-bolts and dropping them over our axle on either side of our leaf spring. Now we'll take our new plate. We want to make sure that this flange right here faces down, this hole here in the center lines up with the alignment pin on our leaf spring, and we'll insert our U-bolts through the holes. Place on our lock washers, and we'll put that on our nuts.Now we can start to tighten our hardware, making sure we tighten them evenly as possible. Now we'll torque our hardware again, making sure we alternate to ensure that we're doing it as evenly as possible.And that completes our look at the CE Smith line of U-bolt kits for mounting round trailer axles..

Customer Reviews

CE Smith U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts - Zinc - CE23002

Average Customer Rating:  4.8 out of 5 stars   (59 Customer Reviews)

Mount your round, 2-3/8" diameter axle to your trailer's leaf springs with this U-bolt kit. U-bolts, plates, nuts, and washers included. Zinc plating resists rust and corrosion - great for boat trailers.

- CE23002
by: 01/15/2021

Not sure what to say, it is what i ordered. It's a spare, no use yet. 938370

- CE23002


- CE23002

I bought a trailer that someone had reversed the axle and did some “REDNECK ENGINEERING “on. I put the axle back where it was supposed to be by using U bolts I had ordered. Everything fit perfect. Now trailer is back like it was supposed to be, thanks to etrailer and Jane. She was so helpful and follow up on my order was exceptional. I know I can always count on etrailer to get what I need at a fair price. THANKS 936712

- CE23002


- CE23002
by: 11/01/2020

Perfect fit and has been problem free. 906792

- CE23002

Holds the axle great. Good quality. 897231

- CE23002

Great fit. Smooth threads. Good corrosion resistant coating. 883267

- CE23002
by: 09/06/2020


- CE23002

nice kit 862300

- CE23002

Great product! 844611

- CE23002

Good quality, excellent website w/ concise videos about product, it’s appropriate uses ( salt water or general use) and how to install. Quick delivery. 837628

- CE23002

Again an excellent product and is holding up very well I would buy again if I needed it 837171

- CE23002

Parts are excellent and they arrived very quickly as usual. Thank you very much. 844477

- CE23002

Quality parts that fit. Thanks Leo 826450

- CE23002

I am extremely happy with the purchase of my leafsprings for my 8x5 single axle trailer. It was easy to install and fit perfect. It made getting back on the road and hauling loads much easier after my old one snapped in half while hauling a load of dirt. Definitely will by from etrailer again and plan to in the near future. 795394

- CE23002

Holding strong after one year 783828

- CE23002

Good product but great service. Fast and great prices. 775784

- CE23002

Outstanding service, and the items were shipped in a timely manner. 758640

- CE23002

parts arrived quickly and exactly as advertised. Easy to find what you need on this site and the amount of information available makes it easy to find what you need. Have ordered several times now from etrailer and every time the service has been great and the quality of the products has been great. 739242

- CE23002

Great service!! Super fast!! 737980

- CE23002

Parts arrived as scheduled. Fit well and I am happy. 733133

- CE23002

Great service 729394

- CE23002

good looking quality and timely shipping 726108

- CE23002

These seem to be good quality, and fit perfectly. The customer service was excellent I was provided frequent updates and and great support. 690602

- CE23002

Other than the burs in the holes looks to be a good product. luckily I had rite size drill bit. 673788

Show More Reviews

Ask the Experts about this CE Smith Trailer Leaf Spring Suspension

  • Can 7/16" U-Bolts be Used for 3,500 lb Axle Suspension
    As long as the 7/16" U-Bolts that you are using fit your 3,500 lb axle diameter correctly and they are rated for a 3,500 lb axle then you are good to go. We only carry 1/2" U-Bolts, parts # CE23002 and # APUBR-1, but when I reached out to my contact at Dexter Axle, who is one of the leading axle manufacturers, they said that 7/16" U-Bolts are fairly common for 3,500 lb axles.
    view full answer...
  • Torque Spec for Tightening Nuts of 1/2 inch Diameter Trailer Suspension U-Bolts
    For 1/2 inch trailer u-bolts that attach to axle the recommended torque value is between 45 and 70 ft lbs of torque.
    view full answer...
  • Is the CE Smith U-Bolt Kit 23002 2-3/8 Inches Wide or 2-7/16 Inches Wide
    The 2-3/8" measurement you are referring to on the CE Smith U-Bolt Kit part # CE23002 is in regards to the diameter of trailer axle that the kit is designed to be used with. The actual width of the u-bolt from the inside edge of each bolt is 2-7/16" and the diameter is 1/2". We do not have a u-bolt with a 2-3/8" width and a 3/8" diameter. However, as mentioned above if this is for a 2-3/8" (3,500 lb) trailer axle then you will want to use one that is slightly larger than the width of the...
    view full answer...
  • Replacement Suspension Components for a 1987 Corey Dual Axle Trailer
    It is always best to replace your suspension components on your trailer with products that are the exact same size as what you currently have. We do have the U-Bolt Kit # CE23002 which is for 3,500 lb axles that have a 2-3/8" diameter and these are 5-1/2" long. I would double check your 5,500 lb axle as that is not a capacity that I am familiar with. It may be a 3,500 lb that could have been misread as 5,500. You can also measure the diameter to verify that it has a larger capacity....
    view full answer...
  • Suspension and Trailer Tire/Wheel Combo Recommendation for Boat Trailer with 3.5K Axle
    I do have just about everything you are needing. The only thing that we don't currently carry is a galvanized axle rated for 3,500 lbs. If you check with a local trailer garage/store they should be able to help you order one that has a galvanized finish that also have the correct hub-face and spring-center measurements for your application. A 3,500 lb axle should use inner bearing L68149, outer bearing L44649, and a grease seal that has an inner diameter of 1.719" and an outer diameter...
    view full answer...
  • Recommended U Bolt Kit and Shackles for 3500-lbs Axle
    For a 3500-lb axle, it's most likely a 2-3/8" diameter so you can use the U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts # APUBR-1. If this is a boat trailer or utility trailer that might be sitting outside a lot you may want to consider upgrading to the CE Smith U-Bolt Kit # CE23002 since they're zinc plated and will help fight off corrosion a bit better. For shackles, the most popular size shackle is 2-1/4" like the part # TRSL225, but you'll want to measure...
    view full answer...
  • Recommended U-Bolts and Plates for Dexter 428510 Axle
    For your 3,500 lb Dexter axle, I recommend the U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts # APUBR-1 or the CE Smith U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts - Zinc # CE23002.
    view full answer...
  • Replacement Double Eye 4 Leaf Spring For Single Axle Trailer
    I have two sets of springs that are a 4 leaf spring that'll work for you. They are for two different weighted axles, a 3,500 lb axle # SP-212275 and a 6,000 lb axle # SP-221275. Both measure 25-1/8 inches long which is a bit shorter, but this is the measurement without any weight on the springs. I've included a diagram with more measurements so you can double check! These both do not come with the mounting hardware. You could use the same hardware or you can use one of these # 7162184UB. I've...
    view full answer...
  • Recommended Replacement Tires for Lowered Trailer Currently Using LT235/75R15 Off-Road Tires
    If your springs are already on top of your axles as it sounds, then you will lose the diameter or your axle plus the spring stack height when you flip the springs to the traditional location under the axle. This will most likely lower your trailer by a little over 3 inches. You need a new u-bolt kit for your axle, so I recommend the CE Smith U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts - Zinc # CE23002 if your axle is 2-3/8 inch diameter or # CE23003 if...
    view full answer...
  • Replacement 26 Inch Leaf Springs, Shackle Straps, And U-Bolts
    To give you the correct leaf springs, I would need to know the capacity of your axle or what your Gross Vehicle Weight Rating (GVWR) is not just the weight of the trailer itself. This is the loaded capacity of the trailer. We have a few options for 26 inch leaf springs: 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long # SP-051275 4-Leaf Double-Eye Spring for 2,000-lb Trailer Axles - 26" Long # SP-124275 6-Leaf Double-Eye Spring for 4,500-lb Trailer Axles - 26" Long...
    view full answer...
  • Axle U-Bolt Kit for Single 2-3/8-Inch Diameter Trailer Axle
    We have many sizes of round and square axle u-bolt kits that appear on the linked page. These are not rated by weight so you simply want to choose the one to match your axle diameter, which should be 2-3/8-inches. U-bolt kits # APUBR-1 or # CE23002 will do the trick.
    view full answer...
  • Parts Needed to Add Tandem Axles to Boat Trailer
    The first step in figuring out what replacement axles to get for your boat trailer is to measure the hub-face and spring-centers of your old axle. After you find that out then you can choose axles that match what your old axle had. I have attached a photo showing where you need to measure on your old axle. You can then use the Hanger Kit # APT5, U-Bolt Kit # CE23002, and Double Eye Spring # SP-212275 for 3,500 lb axles. Be sure that you use the following measurements for this hanger...
    view full answer...
  • Should I Paint U-Bolts to Protect Finish
    If you are concerned about rust and corrosion, an excellent option for you is the CE Smith U-Bolt Kit for Mounting # CE23002 which comes with galvanized plates and zinc-plated hardware. The u-bolts included are also 5-1/2 inches long and 1/2 in diameter just like in the APUBR-1 kit. You can apply a coat of rust-resistant paint to the U-Bolt Kit # APUBR-1 if you want to but it's not required. In fact, most people don't because these components, while susceptible to rust, are not directly...
    view full answer...
  • Replacement Axle for 1990's Karavan Trailer
    The best option we can offer you is the Dexter Trailer Axle Beam part # 8327812 which has a 3,500 lb capacity and E-Z Lube feature. This axle has the same hub face length of 89" and drop of 4" that you were looking for. The spring center is set at 74" yes but you can move these inward to match your 70" spring center no problem. In regards to shape, square vs round this will also not be an issue. The u-bolts would be different yes but you would need to replace these when removed from the...
    view full answer...
  • Recommended Bolt On Hangers For Aluminum Frame Trailer
    Since you've got an aluminum frame trailer, I understand why you're looking for a bolt on solution. The only available bolt on hangers we have available would be the # CE14017G and # CE14016G but they are designed for slipper springs and not double-eye springs like # SP-124275 you were looking at. If you went this route you would want to use something like the # SP-040275 as your springs, which have a 3700-lbs capacity. This would be the best solution available for your new aluminum...
    view full answer...
  • Trailer Suspension U-Bolt Kits for Round and Square Axles
    We do offer u-bolt kits for trailer suspensions for both square and round axles. All of these are shown on the linked page. The nearest round axle u-bolt kits we have to your 2-1/2-inch dimension are kits # CE23002 and # APUBR-1 which are for axles with a diameter of 2-3/8-inches. But we do offer a single 2-1/2-inch u-bolt with nuts as part # 175668, the item you referenced.
    view full answer...
  • Replacement Leaf Springs, U-Bolts, & Shackle Straps for 3,500 Pound 1981 Bass Boat Trailer
    The leaf spring I recommend to replace your trailer's existing leaf springs is the 4-Leaf Double-Eye Spring for 3,500 Pound Trailer Axles # SP-212275. This spring measures 25-1/8 inches from eye-to-eye and will work well to replace the existing spring length. Based on your trailer axle's diameter, the capacity of the axle is 3,500, which is the axle capacity for which these springs are designed. The number of springs to not determine the axle capacity, so it will not affect your trailer...
    view full answer...
  • How to Choose the Best Tires, Wheels and Axle for a Homemade Jet Ski Trailer
    Finding the ideal tires, wheels and axles for your trailer will depend heavily on the overall weight of the trailer. For example, a jet-ski can weigh as little as 400-500 lbs on the light end and around 1,000 lbs on the heavy end. You must also consider the weight of the trailer itself sitting on the axles. Also, keep in mind that if the axle is positioned properly, the tongue of the trailer should hold about 10 percent of the total weight. For example, let's assume that your jet-skis...
    view full answer...
  • Building a Complete Trailer Axle with Wheels that Have a 5 on 5" Bolt Pattern
    We have what you need here! To start with your axle, we have two choices depending on the length of axle you need. If you need a length of 89", then you can use the Dexter Trailer Axle Beam with EZ-Lube Spindles - 89" Long, part # T3584F-EZ-8974. This is an EZ-Lube axle with a capacity of 3500 pounds. If you need a length of 95", then use part # 7359765. I've linked to videos of both of these. Both of these will work with the Trailer Hub and Drum Assembly - 3,500-lb E-Z Lube, part...
    view full answer...

  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality trailer leaf spring suspension 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 leaf spring suspension 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:

Edited by:
Lindsey S
Expert Research:
Jameson C
Video by:
Joshua S
Video Edited:
Dustin K
Installed by:
Cole B
Installed by:
Brent H
Updated by:
Sarah W
Written by:
Amanda M

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.