AEagle 4 Leaf 1750lb Double Eye Spring Kit - Trailer Suspension

In this review of the AEagle 4 Leaf 1750lb Double Eye Spring Kit the bottom line is clear: it is a practical, budget-friendly suspension replacement for owners of small trailers who need a straightforward swap for worn springs. The kit includes two 4-leaf double eye springs rated at 1,750 lb each for a combined 3,500 lb axle capacity and arrives as a complete hanger and U-bolt kit, so installers get most of the hardware needed for a single axle job in one package. It is best suited to DIYers and repair shops focused on function and value rather than cosmetic perfection.

Key Features

• Direct replacement: Replaces part number SW4B and offers the same eye-to-eye length and capacity so it fits most trailers designed for 1,750 lb springs.
• Complete kit: Includes two springs plus a 3,500 lb axle U-bolt kit and hanger kit, which reduces the need to source separate hardware for a single axle installation.
• Robust capacity: Each spring is rated at 1,750 lb so the pair supports a typical 3,500 lb trailer axle with predictable load handling.
• Durable finish: Springs are treated with an anti-rust coating to improve corrosion resistance for longer service life in wet or salty environments.
• Clear installation parameters: The kit lists exact dimensions such as 25-1/4' eye-to-eye, 3' free open and 1-3/4' leaf width to help confirm fit before purchase.

Who It's For

This kit is aimed at trailer owners and small shops performing routine suspension maintenance who want a drop-in replacement for SW4B style springs. It is particularly useful for single-axle trailers up to 3,500 lb where matching leaf length and capacity matters.

Those who need precision-built, symmetrical springs for high-end trailers or who require guaranteed perfect hardware fitment may want to consider higher-tier aftermarket options; several users reported mixed build consistency and occasional missing or damaged hardware during installation.

Pros & Cons

Pros

• Includes a full hanger and U-bolt kit, simplifying a single axle replacement job.
• Good value for money, delivering the required 1,750 lb per spring capacity.
• Anti-rust coating and solid raw material choice improve expected durability.
• Most buyers report good fit and straightforward installation for common trailer axles.

Cons

• Some users noted inconsistent build quality and non-symmetrical leaves on occasion.
• A few reports of missing or stripped hardware mean installers should verify all parts before beginning work.

Specifications

Capacity per spring	1,750 lb
Combined axle capacity	3,500 lb
Eye-to-eye length	25-1/4 in
Free open	3 in
Leaf width	1-3/4 in
Leaf thickness	5/16 in
Included hardware	U-bolts, tie plates, hangers, shackle straps, bolts and nuts

Our Verdict

The AEagle 4 Leaf 1750lb Double Eye Spring Kit is a cost-conscious, functional replacement for trailers needing SW4B-compatible springs. It provides correct load capacity, most required hardware, and an anti-rust finish, making it good value for DIYers and shops. Buyers should inspect included fasteners before installation and accept that cosmetic and symmetry variations may occur on some units.

Frequently Asked Questions

Will these springs fit my 3,500 lb trailer axle?
They are rated at 1,750 lb per spring for a combined 3,500 lb axle capacity and list a 25-1/4 in eye-to-eye length; confirm those dimensions with your trailer before ordering.

Does the kit include U-bolts and hangers?
Yes, the package includes 4 U-bolts, tie plates, hangers, shackle straps and required nuts and bolts for a single axle installation.

Are replacement bushings included?
Each spring has two installed bushings of 9/16 in diameter, so no separate bushings are required for initial installation.