---
product_id: 443170337
title: "LIBRA 3500lb Single Trailer Axle Suspension Kit Leaf Spring U-Bolt & Hanger Kit"
brand: "libra"
price: "4004 Lei"
currency: RON
in_stock: true
reviews_count: 8
category: "Libra"
url: https://www.desertcart.ro/products/443170337-libra-3500lb-single-trailer-axle-suspension-kit-leaf-spring-u
store_origin: RO
region: Romania
---

# 25.25 inch eye-to-eye length Complete U-bolt & hanger kit 3,500 lbs axle capacity LIBRA 3500lb Single Trailer Axle Suspension Kit Leaf Spring U-Bolt & Hanger Kit

**Brand:** libra
**Price:** 4004 Lei
**Availability:** ✅ In Stock

## Summary

> 🚛 Elevate your trailer game with LIBRA’s powerhouse suspension kit!

## Quick Answers

- **What is this?** LIBRA 3500lb Single Trailer Axle Suspension Kit Leaf Spring U-Bolt & Hanger Kit by libra
- **How much does it cost?** 4004 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/443170337-libra-3500lb-single-trailer-axle-suspension-kit-leaf-spring-u)

## Best For

- libra enthusiasts

## Why This Product

- Trusted libra brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Fit:** 25-1/4 inch eye-to-eye length and 1-3/4 inch leaf width ensure seamless replacement and optimal suspension performance.
- • **All-Inclusive Kit:** Includes U-bolts, tie plates, hangers, shackle straps, and hardware for a hassle-free, one-stop installation.
- • **Easy Installation:** Pre-assembled components and nylon bushings reduce noise and wear, saving you time and effort on the road.
- • **Heavy-Duty Strength:** Supports up to 3,500 lbs trailer axle load with dual 1,750 lbs leaf springs for unmatched durability.
- • **Trusted OEM Quality:** Backed by 16+ years of LIBRA’s industry-leading reliability, favored by major trailer manufacturers.

## Overview

The LIBRA 3500lb Single Trailer Axle Suspension Kit is a robust, OEM-quality solution designed for standard 3,500 lbs trailer axles. Featuring dual 1,750 lbs leaf springs with nylon bushings, a precise 25-1/4 inch eye-to-eye length, and a comprehensive U-bolt and hanger kit, it guarantees durability, easy installation, and reliable performance trusted by industry leaders for over 16 years.

## Description

1,750lbs capacity per each spring, for standard 3,500lbs trailer axle,Eye to Eye length: 25-1/4 inch, Free open: 3 inch, width of leaf: 1-3/4 inch, 4 leaves, 9/16 inch bushing dia, nylon bushings installedIt will replace SW4B / 72-42 / LIB-401-DE / UNA212 / PR4B / 124903 / 9150014 / 93184 (different SKU# but same spring) Include 3,500lbs axle U-bolt kit for 2-3/8" dia round trailer axles , Kit include: 4 x 5-1/2" long U bolts, U bolts dia. 1/2"; 2 x tie plates for 1-3/4" leaf springs; 8 x 1/2"-20 hex nuts Include Complete single trailer axle hanger kit for 1-3/4" leaf springs, Kit include: 2 x 3" tall hangers, 2 x 2.1" tall hangers, 4 x shackle straps (eye to eye 3.09"), 6 x 9/16"-18 x 3" long shackle bolts and locknutsLIBRA has been supplying US OEM trailer industry for over 16 years, reliable and quality parts trusted by major trailer & trailer axle manufacturers.

Review: Quality kit, good pkg, on time. - Kit provided all fasteners and parts needed to replace a very old system. Was impressed with how easy it was to install. Loose assemble ALL parts before tightening to aid in aligning. You will save :10 off the :65 it took me to finish the installation.
Review: Work - These work as they should. Its a universal part so some fabrication was necessary. Trailer pulls great

## Features

- 1,750lbs capacity per each spring, for standard 3,500lbs trailer axle,Eye to Eye length: 25-1/4 inch, Free open: 3 inch, width of leaf: 1-3/4 inch, 4 leaves, 9/16 inch bushing dia, nylon bushings installed
- It will replace SW4B / 72-42 / LIB-401-DE / UNA212 / PR4B / 124903 / 9150014 / 93184 (different SKU# but same spring)
- Include 3,500lbs axle U-bolt kit for 2-3/8" dia round trailer axles , Kit include: 4 x 5-1/2" long U bolts, U bolts dia. 1/2"; 2 x tie plates for 1-3/4" leaf springs; 8 x 1/2"-20 hex nuts
- Include Complete single trailer axle hanger kit for 1-3/4" leaf springs, Kit include: 2 x 3" tall hangers, 2 x 2.1" tall hangers, 4 x shackle straps (eye to eye 3.09"), 6 x 9/16"-18 x 3" long shackle bolts and locknuts
- LIBRA has been supplying US OEM trailer industry for over 16 years, reliable and quality parts trusted by major trailer & trailer axle manufacturers.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09TJVC8JL |
| Best Sellers Rank | #995,822 in Automotive ( See Top 100 in Automotive ) #154 in Trailer Springs |
| Brand | LIBRA |
| Customer Reviews | 4.4 4.4 out of 5 stars (76) |
| Date First Available | February 27, 2022 |
| Item Weight | 50.1 pounds |
| Manufacturer | LIBRA |
| Manufacturer Part Number | SW4B |
| OEM Part Number | 072-42, SW4B |
| Package Dimensions | 28 x 28 x 7 inches |

## Images

![LIBRA 3500lb Single Trailer Axle Suspension Kit Leaf Spring U-Bolt & Hanger Kit - Image 1](https://m.media-amazon.com/images/I/71dGcwkCGRL.jpg)
![LIBRA 3500lb Single Trailer Axle Suspension Kit Leaf Spring U-Bolt & Hanger Kit - Image 2](https://m.media-amazon.com/images/I/81lkJwswPCL.jpg)
![LIBRA 3500lb Single Trailer Axle Suspension Kit Leaf Spring U-Bolt & Hanger Kit - Image 3](https://m.media-amazon.com/images/I/51SmlUhocBL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quality kit, good pkg, on time.
*by A***R on July 28, 2024*

Kit provided all fasteners and parts needed to replace a very old system. Was impressed with how easy it was to install. Loose assemble ALL parts before tightening to aid in aligning. You will save :10 off the :65 it took me to finish the installation.

### ⭐⭐⭐⭐⭐ Work
*by S***Y on February 20, 2026*

These work as they should. Its a universal part so some fabrication was necessary. Trailer pulls great

### ⭐⭐⭐⭐⭐ Quality
*by M***D on December 6, 2024*

Quality product was not expecting the leaf springs and hangers to be so well made for the price.

## Frequently Bought Together

- LIBRA 3500lb Single Trailer Axle Suspension Kit Leaf Spring U-Bolt & Hanger Kit
- MAXXHAUL 70205 Trailer Light Kit - 12V All LED, Left and Right Waterproof Submersible for Trailers, Boat Trailer Truck Marine Camper RV Snowmobile, Red
- HECASA Single Axle Trailer Fenders W/Fender Backs Fits 14" to 16" Wheels - 32" x 9" x 15" Replacement for Car Hauler Trailer Cargo Trailer Utility Trailer Landscape Trailer Steel Round (2Pcs)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ro/products/443170337-libra-3500lb-single-trailer-axle-suspension-kit-leaf-spring-u](https://www.desertcart.ro/products/443170337-libra-3500lb-single-trailer-axle-suspension-kit-leaf-spring-u)

---

*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-04-25*