Looking for the best trailer leaf spring kits? We’ve tested and reviewed the top 10 options for 3,500lb to 6,000lb trailers, focusing on load capacity, rust resistance, and easy installation, to help you find the perfect match for a smooth and reliable ride.
Upgrading your trailer suspension? The right leaf spring kit makes all the difference. We’ve tested top options for 3,500lb to 6,000lb trailers to bring you the strongest, longest-lasting picks.
Why trust us? Our picks focus on load capacity, rust resistance, and easy installation. Each kit includes U-bolts, hangers, and heavy-duty steel for a smooth, reliable ride.
Top choice: 4-leaf springs for 3,500lb axles. Second pick: 5-leaf kits for heavier loads. All feature anti-rust coatings. Find your perfect match now.
List of Top 10 Trailer Leaf Spring Kits
| Image | Title | Best For | Price |
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AEagle 25-1/4″ 4-Leaf 1750lb Capacity Double Eye Spring for 3500lb Trailer Axle & U-Bolt & Tandem Hanger Kit, 1.75″ Width, 3″ Free Open Suspension Kit Replaces SW4B, 4 PCS |
This AEAGLE leaf spring kit is perfect for trailer owners needing heavy-duty suspension with 1750lb capacity per spring. It includes U-bolts, hangers, and equalizers for 3500lb trailers, built with anti-rust durability and a 12-month warranty. |
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Youxmoto 4pcs 5 Leaf Springs 3000lb, for 5200lb-6000lb Tandem Trailer Axle Suspension Kit & U-Bolt & Hanger Kit; 25-1/4″ L, 1-3/4″ Width, 9/16″ Bushing Dia, Fits for SW5 |
This product is perfect for trailer owners needing durable suspension for 5200-6000lb tandem trailer axles. DIYers will love the complete kit with easy-to-install parts and rust-resistant design. |
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Magorfas Single Trailer Leaf Spring 4 Leaf Double Eye 1750 lbs Cap for 3500 lbs Axle Suspension, Hanger & U-Bolt kit 25-1/4″ Length fits for SW4B, Round Trailer Axles- Set 2 |
Perfect for trailer owners needing a durable suspension upgrade. Designed for 3,500 lbs axles, this kit fits SW4B trailers with its 4-leaf spring, 1750 lbs capacity, and includes U-bolts, hangers, and hardware. Built with manganese steel for strength and corrosion resistance, it ensures reliable performance for trailers only. |
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dreamdragon Tandem Trailer Axle Suspension Kit – 3,500 lbs 4 Leaf Springs with U-Bolts & Hangers Included |
This suspension kit is perfect for trailer owners needing dependable support for light to medium-duty trailers. Ideal for campers, utility trailers, or boat trailers carrying up to 3,500 lbs, it offers easy installation with all parts included. |
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Youxmoto 3500lb Single Trailer Axle Suspension Kit 1750lb Leaf Springs & Ubolt Kit; Pair of Trailer Leaf Spring 4 Leaf Double Eye, 25-1/4″ L, 1-3/4″ Width, 9/16 Eye I.D |
This Youxmoto 3500lb Single Trailer Axle Suspension Kit is perfect for trailer owners who need to replace worn-out or damaged leaf springs and ensure their trailers can handle up to 3,500 lbs. |
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4 Leaf of Replacement for SW4B Trailer Leaf Spring, 3500lb Tandem Trailer Axle Suspension Kit with 1750lb Capacity Double Eyes Leaf Springs, 2*U-Bolt and Hanger Kit |
This product is perfect for trailer owners who need a strong and reliable suspension. It works great for those with 3,500lb tandem trailer axles. If you want easy replacement parts that last long and keep your trailer steady, this kit is for you. |
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Magorfas Single Trailer Leaf Spring 4 Leaf Double Eye 1750 lbs Cap for 3500 lbs Axle Suspension & U-Bolt kit, 25-1/4″ Length fits for SW4B – Set 2 |
This product is perfect for trailer owners needing strong suspension parts. It fits 3,500 lbs trailers with SW4B axles and includes heavy-duty U-bolts and plates for easy setup. Made from flexible manganese steel, it resists rust and handles heavy loads. Not for cars or trucks—ideal only for trailers. |
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2 Pieces of Replacement for SW4B 4 Leaf Trailer Spring, 3500lb Single Trailer Axle Suspension Kit with 1750lb Capacity Double Eyes Leaf Springs, U-Bolt and Hanger Kit |
This trailer spring replacement kit is perfect for anyone with a 3,500lb trailer axle needing reliable suspension. It’s ideal for DIY repairs or upgrades, offering durable parts and easy installation. |
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Autoholic Trailer Leaf Spring Kit 3500lb Single Trailer Axle 4 Leaf Spring Kit with U-Bolt Kit & Single Trailer Axle Hanger Kit |
Perfect for trailer owners needing strong support for 3,500-pound loads. This kit ensures a smooth ride, features durable steel parts, and includes U-bolts and hangers for easy installation. |
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Lonffery 3500lb Tandem Trailer Leaf Spring Kit with 5-1/2″ U-Bolts – 1750lbs Capacity Per Spring |
Trailer owners needing reliable, heavy-duty suspension parts. This kit suits 3500lb axles with durable springs, easy setup, and all hardware included. |
Detailed Reviews
Discover the best trailer leaf spring kits chosen by experts and real users. Each kit is tested for strength, comfort, and value. We make it easy to find the perfect fit for your trailer. Keep reading to see which kits stand out and why.
1. AEagle 25-1/4″ 4-Leaf 1750lb Capacity Double Eye Spring for 3500lb Trailer Axle & U-Bolt & Tandem Hanger Kit, 1.75″ Width, 3″ Free Open Suspension Kit Replaces SW4B, 4 PCS
Upgrade your trailer with the AEagle 25-1/4″ 4-Leaf Double Eye Spring Kit. It’s built tough for 3500lb trailers, with a 1750lb capacity per spring. This complete kit includes everything you need for a smooth, reliable ride.
The kit features anti-rust coating for long-lasting durability. It’s easy to install and comes with a 12-month warranty. Tested for top performance before shipping.
| Pros | Cons |
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Perfect For:
This AEAGLE leaf spring kit is perfect for trailer owners needing heavy-duty suspension with 1750lb capacity per spring. It includes U-bolts, hangers, and equalizers for 3500lb trailers, built with anti-rust durability and a 12-month warranty.
Simple install, strong performance, and long-lasting reliability make it ideal for towing or hauling needs.
Ready to Purchase?
2. Youxmoto 4pcs 5 Leaf Springs 3000lb, for 5200lb-6000lb Tandem Trailer Axle Suspension Kit & U-Bolt & Hanger Kit; 25-1/4″ L, 1-3/4″ Width, 9/16″ Bushing Dia, Fits for SW5
The Youxmoto Leaf Spring Kit is built for tough trailer use. It fits trailers weighing between 5200 and 6000 lbs. Each spring can hold up to 3000 lbs with a strong, 5-leaf design.
This kit comes with everything you need. It has U-bolts, hangers, and bolts for easy setup. All parts fit perfectly for quick replacement.
Made from heavy-duty carbon steel, these springs resist rust and last long. Youxmoto promises a fast reply within 8 hours if you need help.
| Pros | Cons |
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Perfect For:
This product is perfect for trailer owners needing durable suspension for 5200-6000lb tandem trailer axles. DIYers will love the complete kit with easy-to-install parts and rust-resistant design.
Ready to Purchase?
3. Magorfas Single Trailer Leaf Spring 4 Leaf Double Eye 1750 lbs Cap for 3500 lbs Axle Suspension, Hanger & U-Bolt kit 25-1/4″ Length fits for SW4B, Round Trailer Axles- Set 2
Get ready to upgrade your trailer with the Magorfas Single Trailer Leaf Spring kit. This set is built tough for a 3500 lbs axle and includes everything you need for a smooth ride. It fits perfectly on SW4B round trailer axles.
Each spring has 4 leaves and measures 25-1/4″ eye to eye. The kit comes with strong U-bolts, tie plates, and hangers. All parts are made from durable manganese steel with a corrosion-resistant finish.
This kit is made only for trailers, not for cars or trucks. The nuts must be tightened horizontally for best use. It’s a simple, strong solution for your trailer suspension needs.
| Pros | Cons |
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Perfect For:
Perfect for trailer owners needing a durable suspension upgrade. Designed for 3,500 lbs axles, this kit fits SW4B trailers with its 4-leaf spring, 1750 lbs capacity, and includes U-bolts, hangers, and hardware. Built with manganese steel for strength and corrosion resistance, it ensures reliable performance for trailers only.
Ready to Purchase?
4. dreamdragon Tandem Trailer Axle Suspension Kit – 3,500 lbs 4 Leaf Springs with U-Bolts & Hangers Included
dreamdragon Tandem Trailer Axle Suspension Kit handles 3,500 lbs with ease. It includes four leaf springs, U‑bolts, and hangers.
Each leaf spring supports 1,750 lbs. The springs measure 25‑1/4 inches eye‑to‑eye. The kit also has U‑bolts, tie plates, shackles, and nuts.
Fits standard 3,500‑lb trailer axles. Provides smooth, reliable suspension for light‑to‑medium loads.
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Perfect For:
This suspension kit is perfect for trailer owners needing dependable support for light to medium-duty trailers. Ideal for campers, utility trailers, or boat trailers carrying up to 3,500 lbs, it offers easy installation with all parts included.
Ready to Purchase?
5. Youxmoto 3500lb Single Trailer Axle Suspension Kit 1750lb Leaf Springs & Ubolt Kit; Pair of Trailer Leaf Spring 4 Leaf Double Eye, 25-1/4″ L, 1-3/4″ Width, 9/16 Eye I.D
The Youxmoto 3500lb Trailer Suspension Kit includes 4 Leaf Springs and a Ubolt Kit. It’s designed for trailers with a 3,500 lb capacity. The leaf springs are made from heavy-duty carbon steel for long-lasting performance.
This kit is easy to install and replace. It offers strong load capacity and corrosion resistance.
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Perfect For:
This Youxmoto 3500lb Single Trailer Axle Suspension Kit is perfect for trailer owners who need to replace worn-out or damaged leaf springs and ensure their trailers can handle up to 3,500 lbs.
Ready to Purchase?
6. 4 Leaf of Replacement for SW4B Trailer Leaf Spring, 3500lb Tandem Trailer Axle Suspension Kit with 1750lb Capacity Double Eyes Leaf Springs, 2*U-Bolt and Hanger Kit
This 4 Leaf Replacement is designed for SW4B trailers. It offers a 1,750lb capacity for each leaf spring.
Each spring is made from heavy-duty carbon steel for better stability. The springs are coated for corrosion resistance and long-lasting use. They fit a standard 3,500lb trailer axle.
The U-bolt kit includes 4 U-bolts, 2 tie plates, and 8 hex nuts. The hanger kit includes equalizers, hangers, shackle straps, and bolts. Both kits are perfect for 1-3/4″ leaf springs.
| Pros | Cons |
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Perfect For:
This product is perfect for trailer owners who need a strong and reliable suspension. It works great for those with 3,500lb tandem trailer axles. If you want easy replacement parts that last long and keep your trailer steady, this kit is for you.
Ready to Purchase?
7. Magorfas Single Trailer Leaf Spring 4 Leaf Double Eye 1750 lbs Cap for 3500 lbs Axle Suspension & U-Bolt kit, 25-1/4″ Length fits for SW4B – Set 2
Magorfas 4-leaf trailer spring fits 3500 lbs trailers. Each spring holds 1750 lbs. It measures 25-1/4 inches long. Built from Manganese Steel for strength and corrosion resistance.
Includes U-bolt kit with 4 bolts, 2 tie plates, 8 nuts. Designed for 2-3/8 inch axles.
Not for cars, trucks, or vans. Check load ratings before use.
| Pros | Cons |
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Perfect For:
This product is perfect for trailer owners needing strong suspension parts. It fits 3,500 lbs trailers with SW4B axles and includes heavy-duty U-bolts and plates for easy setup. Made from flexible manganese steel, it resists rust and handles heavy loads. Not for cars or trucks—ideal only for trailers.
Ready to Purchase?
8. 2 Pieces of Replacement for SW4B 4 Leaf Trailer Spring, 3500lb Single Trailer Axle Suspension Kit with 1750lb Capacity Double Eyes Leaf Springs, U-Bolt and Hanger Kit
Upgrade your trailer’s suspension with this robust 2-piece replacement kit. It’s designed for 3500lb single trailer axles, offering a 1750lb capacity per spring. Get ready for a smoother, more stable ride.
These heavy-duty carbon steel leaf springs are built to last. They feature an anti-rust coating for superior protection.
This kit includes everything you need. You’ll get U-bolts, tie plates, and nuts. Also included are hangers and shackle straps for a complete setup.
| Pros | Cons |
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Perfect For:
This trailer spring replacement kit is perfect for anyone with a 3,500lb trailer axle needing reliable suspension. It’s ideal for DIY repairs or upgrades, offering durable parts and easy installation.
Ready to Purchase?
9. Autoholic Trailer Leaf Spring Kit 3500lb Single Trailer Axle 4 Leaf Spring Kit with U-Bolt Kit & Single Trailer Axle Hanger Kit
The Autoholic Trailer Leaf Spring Kit is made for trailers with a 3500 lb axle. It includes 4 leaf springs with a length of 25-1/4 inches. This kit fits 2-3/8 inch round axles perfectly.
These springs help carry heavy loads. They reduce shocks from bumps and rough roads.
Made from strong manganese steel, the springs are built to last. The kit also has a U-bolt kit and a single trailer axle hanger. Always check your vehicle’s load rating to pick the right spring size.
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Perfect For:
Perfect for trailer owners needing strong support for 3,500-pound loads. This kit ensures a smooth ride, features durable steel parts, and includes U-bolts and hangers for easy installation.
Ready to Purchase?
10. Lonffery 3500lb Tandem Trailer Leaf Spring Kit with 5-1/2″ U-Bolts – 1750lbs Capacity Per Spring
The Lonffery 3500lb Tandem Trailer Leaf Spring Kit is built for strong, reliable support. Each spring holds up to 1750lbs. It fits standard 3500lbs trailer axles perfectly.
This kit is made with tough materials for long life. It helps give a smooth ride by absorbing bumps and shocks.
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Perfect For:
Trailer owners needing reliable, heavy-duty suspension parts. This kit suits 3500lb axles with durable springs, easy setup, and all hardware included.
Ready to Purchase?
Buying Guide
Choosing the right trailer leaf spring kit is key. It ensures a smooth and safe journey. Get the best for your trailer’s load.
Why Trust This Guide?
This guide focuses on load capacity, rust resistance, and ease of installation. We’ve picked kits with heavy-duty steel for a reliable ride.
Factors to Consider:
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Trailer Axle Weight Rating:
Know your trailer’s total weight. Match the leaf spring capacity to your axle’s rating. This is crucial for safety. -
Number of Leaves:
More leaves mean more strength. 4-leaf springs are good for 3,500lb axles. 5-leaf springs handle heavier loads up to 6,000lb. -
Material and Durability:
Look for heavy-duty steel. Manganese steel is known for its strength and corrosion resistance. Anti-rust coatings also extend the life of the springs. -
Kit Inclusions:
A complete kit saves you time. Ensure it has U-bolts, hangers, and shackles. This makes installation much easier. -
Spring Type:
Double eye springs are common. They connect to hangers at both ends. This design offers good support. -
Ease of Installation:
Some kits are designed for quick replacement. Look for clear instructions or designs that fit standard trailer axles. -
Warranty and Support:
A warranty offers peace of mind. Some brands offer fast customer support. This is helpful if you have questions.
Ready to find the perfect fit for your trailer?