1. Trailer Leaf Spring Suspension
  2. Redline
  3. U-Bolts
  4. Axle Mounting Hardware
  5. Square Axle - 1-1/2 Inch
  6. 5 Inch Long
1-1/2" Square Trailer U-Bolts (Qty 2)

1-1/2" Square Trailer U-Bolts (Qty 2)

Item # SP01-120
lowest price pledge
Our Price: $26.71
Trailer Leaf Spring Suspension
Orders above $50 qualify for Free Shipping
Shipping Weight: 1.51 lbs
Quantity: 
In Stock
SP01-120 - 1/2 Inch Diameter Redline Trailer Leaf Spring Suspension
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

Customer Photos

Videos

Lowest Prices for the best trailer leaf spring suspension from Redline. 1-1/2" Square Trailer U-Bolts (Qty 2) part number SP01-120 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (83)
  • Q & A (13)
  • Videos (1)
  • Photos
  • Why etrailer?

Redline Trailer Leaf Spring Suspension - SP01-120

  • U-Bolts
  • Axle Mounting Hardware
  • Square Axle - 1-1/2 Inch
  • 5 Inch Long
  • 3500 lbs
  • 1/2 Inch Diameter
  • Redline


Square Trailer U-Bolt

  • Width: 1-1/2"
  • Diameter: 1/2"
  • Length: 5"
    • Threaded portion measures 2"
  • For 3,500-lb axles only
  • Includes Lock Nuts

071090 Redline Square Trailer U-Bolts with Nuts and Washers





Video of 1-1/2" Square Trailer U-Bolts (Qty 2)

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




Video Transcript for Redline Trailer Suspension SP01-120 Review

Today we'll be reviewing part number SP01-120. This is Red Line's 1 1/2 inch Square Trailer U-bolts. You're going to get two U-Bolts and you're going to get four nuts. The width of the U-bolts. We're measuring the distance between the two bolt posts. Is going to measure an inch and a half.

Each bolt is going to give us a diameter of a half inch. The length that we have from the bottom of the cross member to the bottom of the mounting post or the bolt post is going to be 5 inches. The threaded portion going to measure right at 2 inches. This is for 3500 pound axles 00:43 only. Again, you're going to get two U-bolts, measure a half inch in diameter, and you're going to get four nuts.

That's going to do it for our review of part number SP01-120. This is Red Line's 1 1/2 inch Square Trailer U-bolts. .


Customer Reviews

1-1/2" Square Trailer U-Bolts (Qty 2) - SP01-120

Average Customer Rating:  4.8 out of 5 stars   (83 Customer Reviews)


- SP01-120
by:

I purchased these U bolts to upgrade the suspension on my trailer. I would get a a lot of trailer sway when I was towing my jet ski trailer. I bought the trailer used and never really looked at the springs. Unfortunately for me, There was nothing but one U bolt strapped diagonally across the spring. I'm no suspension expert but I knew this could NOT be safe. I did extensive research on trailer suspension. It was difficult to find parts for a 11/2 inch square axle. It was until I came across etrailer webpage. They had everything I required to upgrade and make my trailer safe to operate on the road. It was actually criminal what the person did to attach the original spring. I am greatful nothing ever happened while towing. Now with the new parts installed, I feel a lot better and my trailer does not sway anymore. I will definitely purchase my trailer needs from etrailer from now on. The pictures and videos make finding what I needed so much easier. The complete transaction from order to delivery was extremely efficient and the customer service is absolutely outstanding. 636959



- SP01-120
by:

I got what I was looking for and received just what I ordered. 852355



- SP01-120
by:

These U-Bolts were exactly what I needed to replace the 1 1/2" wide ones on my 1966 Silver Streak travel trailer. When I started this project I had no idea how hard parts were going to be to find. When I brought the original U-Bolts in to my local (Anchorage, AK) trailer supply place and also a custom spring shop they all looked at them like they had dropped in from outer space. etrailer had exactly what I needed to get our vintage trailer back on the road. This will be my first stop the next time I need parts for my not so standard trailer. Thanks etrailer.com! 822285



- SP01-120
by:

Just what I needed. It was very hard to find 11/2 axle parts. Etrailer had it. Thanks. 802572



- SP01-120
by:

Exactly the item I needed! 3 places in my not so small but not so big town, did not carry these. I am glad that I looked on-line and the best part was the price was very reasonable for these u-bolts. Shipping was on time too!! 786834



- SP01-120
by:

Excellent product, bolted right on, great fit. Several orders through etrailer.com have yet to be disappointed 786540



- SP01-120
by:

The u-bolts that I ordered from etrailer arrived quickly, even tho I chose the economy shipping option. The bolts are a hard to find item and are exactly as shown on the etrailer website. I am very pleased and won't hesitate to make additional purchases from etrailer.com 778715



- SP01-120
by:

These U-bolts are massive and exactly what I needed to upgrade my trailer suspension. Great service and fast delivery, too. Etrailer.com is my new go-to for anything trailer related. 776882



- SP01-120
by:

Excellent process start to finish, order arrived promptly and the customer service follow-up was excellent 775062



- SP01-120
by:

hard to find item, only wish they were galvanized. seems that nobody makes a galvanized 1 1/2 in. square u-bolt. but product shipped very fast, and in good condition. thanks 716823



- SP01-120
by:

100% impressed with etrailer. My customer rep, Diana, was very courteous, knowledgeable, and friendly. I placed my order on Monday and was told that my shipment would arrive on Thursday. About ten minutes later, I received an email stating that my order had shipped! I just received another email that my package has been delivered - a day early. I was able to track the package from the etrailer website. I just want to say thank you for the unexpected, exceptional service from everyone at etrailer. I look forward to placing more orders in the near future. Thanks again 716353



- SP01-120
by:

Product was very easy to install, very well built and looks good on my trailer 656047



- SP01-120
by:

Appear to be very strong! They do NOT come plated and ready to use! They have to be degreased, primed and painted (or powder coated?) for maximum rust prevention! 628292



- SP01-120
by:

Perfect fitting ubolts for new axle installation, no issue's after a year of heavy use. 621944



- SP01-120
by:

Good quality, perfect replacement after cutting my old rusted u-bolts off. 621577



- SP01-120
by:

Thank u very much 578975



- SP01-120
by:

Excellent product and I appreciate the quick shipping I was not expecting. 564162



- SP01-120
by:

Bought these a year ago and still in like new condition, no rust at all and was a perfect fit when installed 544166



- SP01-120
by:

The U bolts and spring plates were of good quality, but the price was much higher than it should be. I needed them so I bought them, even though the price was way too high. 528841


Comments
Good
Landy - 06/30/2019

57313

- SP01-120
by:

These are exactly what we were looking for. etrailer is the only place we could find the 1.5" Size in a 1/2" diameter square u-bolt. 514237



- SP01-120
by:

They were ok , they hold the bracket on that hold the fender on. 510027



- SP01-120
by:

Only place that had the part i needed. Called to make sure it was the right part and ordered over the phone. Fast and easy. 506028



- SP01-120
by:

Perfect fit. Everything went together very smoothly. 505813


Comments
great, no problems with about 1000 miles on the new parts now.
Michael E - 05/10/2019

55082

- SP01-120
by:

Products are as advertised and of excellent quality. Prompt shipping and professional. No fuss, no muss... what more could I ask for! 501221


Comments
Still on my boat trailer no issues!
Christian - 04/27/2019

54558

- SP01-120
by:

These U-bolts were hard to find any where else. As always, etrailer came thru. The U-bolts went perfect with the plate that I also ordered from etrailer. The part went on with ease on my old Gamefisher trailer. Road tested it today and its holding good and no problems. Everything that I have ordered from etrailer has a very good price and great inventory that no one can match. 482657


Comments
Its been a year since I put this on my trailer and its working great. No problems at all. Thanks etrailer for having hard to find parts and great service.
Robert - 03/08/2019

50309
28
89
Show More Reviews

Ask the Experts about this Redline Trailer Leaf Spring Suspension

Do you have a question about this Trailer Leaf Spring Suspension?




  • 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:

Expert Research:
Patrick B
Expert Research:
Adam R
Video by:
Kathleen M
Installed by:
Cole B

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. Let us know if anything is missing or if you have any questions.