Choosing the right leaf springs is essential for dump trailers to handle loads, absorb road jolts, and maintain stability. This guide reviews five well-regarded options across different load capacities and configurations, helping you compare fit, material, and performance for safer hauling. The selections cover common axle ratings and eye-to-eye lengths, with attention to corrosion resistance and ease of installation.
| Product | Brand | Capacity (per spring) | Eye-To-Eye | Leaves | Compatibility |
|---|---|---|---|---|---|
| Magorfas Single Trailer Leaf Spring | Magorfas | 1750 lbs | 25-1/4″ | 4 | 3500 lbs trailer axles; SW4B |
| 6-Leaf Heavy Duty Trailer Spring | TRAILER SUPPLIES | 6000 lbs | 30-1/2″ | 6 | 12,000 lbs axle capability |
| Autoholic Trailer Leaf Spring Kit | Autoholic | 1750 lbs | 25-1/4″ | 4 | 3500 lbs axle; includes U-bolt kit |
| dreamdragon Tandem Suspension Kit | dreamdragon | 3500 lbs per spring | 25-1/4″ | 6 | 7K axles; tandem setup |
| Youxmoto 5-Leaf Springs | Youxmoto | 3000 lbs | 25-1/4″ | 5 | SW5 compatible; heavy-duty |
Magorfas Single Trailer Leaf Spring 4-Leaf SW4B
Specifications include 4 leaves with an eye-to-eye length of 25-1/4″, 3″ free open, 1-3/4″ leaf width, 9/16″ bushing, and 5/16″ leaf thickness. Each spring supports about 1750 lbs, suitable for 3500 lbs trailers. The kit uses 60Si2Mn manganese steel for strength and corrosion resistance with a two-coat paint finish. Fitment targets SW4B trailers; verify load rating before purchase.
6-Leaf Heavy Duty Trailer Spring
Designed for 12,000 lb axle capacity, this slipper-style spring uses 3″ wide alloy steel and measures 30-1/2″ long from center to slipper end. It features a 1″ spring eye diameter with a rubber bushing installed for vibration reduction and easier installation. Replacement aligns with UNA-269 and 72-44-1 parts. The kit is built for high-load trailers, offering durability and stability under heavy use.
Autoholic Trailer Leaf Spring Kit
Autoholic provides a complete 4-leaf, 25-1/4″ eye-to-eye spring kit rated for up to 1750 lbs per spring, suitable for standard 3500 lbs trailer axles. The package emphasizes a robust manganese steel construction and straightforward replacement. It is designed to cushion travel and relieve stress on the trailer chassis, with easy maintenance and reliability in frequent-use scenarios.
dreamdragon Tandem Trailer Suspension Kit
This kit includes six 4-leaf springs, U-bolts, and hanger hardware for 7,000 lbs tandem axles. Each leaf spring is rated around 3,500 lbs, with a 25-1/4″ eye-to-eye length, 3″ free open height, and 1-3/4″ leaf width. The set utilizes manganese steel with a corrosion-resistant finish, offering durable suspension for heavy-duty use and long-distance hauling where tandem axles are required.
Youxmoto 5-Leaf Springs For SW5
Youxmoto provides a 4-piece 5-leaf spring kit designed for SW5-compatible tandems, rated at 3000 lbs per spring (total payload potential up to 6000 lbs). Features include 25-1/4″ eye-to-eye length, 3″ free open, 1-3/4″ leaf width, and 9/16″ bushing diameter. The kit also includes corresponding U-bolt hardware for full replacement and reliable mounting stability.
Buying Guide: Key Purchase Considerations And Comparisons
Purpose and compatibility: Match the axle capacity of your trailer with the spring’s per-spring rating and the overall suspension layout (single vs. tandem). For dump trailers, stability under load and smooth recovery after unloading are crucial.
Leaf count and design: More leaves generally provide better load distribution and ride comfort on rough roads, but add weight and complexity. Slipper-style and standard designs each have distinct installation and towing characteristics.
Eye-to-eye length and mounting: Ensure the spring’s eye-to-eye measurement aligns with your trailer’s hanger and axle arrangement. Incorrect length can cause binding, improper ride height, or clearance issues with tires and frame.
Material and finish: Look for manganese steel (60Si2Mn) for strength and fatigue resistance. Corrosion-resistant coatings extend life in exposed environments.
Hardware included: Some kits come with U-bolts, brackets, and hanger components. Confirm whether mounting hardware is included or if replacements are needed.
Ease of installation and maintenance: Kits with pre-installed bushings or easy-to-handle hardware simplify setup, reduce vibration, and shorten downtime for repairs.
Warranty and availability: Consider brands with clear warranty terms and readily available replacement parts to minimize downtime on critical dumpsites or work sites.
Cost vs. benefit: Heavier-duty springs provide longer service life on demanding jobs but may require changes to mounting components or leveling adjustments. Balance upfront cost with expected load cycles and maintenance needs.