4 Leaf 2500lb Double Eye Spring for 5000lb Trailer Axle - Durable Fit

Our review of the 4 Leaf 2500lb Double Eye Spring focuses on trailer owners who need a straightforward, cost-effective replacement for SW4-style axles. The bottom line: this two-piece spring kit offers correct sizing and a robust capacity for a 5000 lb trailer, making it a practical choice for routine trailer maintenance and axle rebuilds. It stands out for its clear specifications like 25-1/4' eye-to-eye length and 2500 lb capacity per spring, and it delivers reliable ride support when fitment and installation are handled carefully.

Key Features

• 2500 lb capacity per spring: Provides the rated load support needed for a 5000 lb trailer when used as a matched pair, giving predictable suspension response under load.
• Precise eye-to-eye length: The 25-1/4' measurement helps ensure the springs match trailer hangers and mounting points for a proper fit.
• Four-leaf construction: The 4 leaves with 3/8' thickness balance load capacity and ride compliance for common trailer applications.
• Anti-rust coating: A corrosion-resistant finish extends service life in wet or salty environments and reduces surface deterioration.
• Included bushings: 9/16' eye diameter with bushing simplifies installation and reduces wear at the mounting points.

Who It's For

This kit is aimed at DIY trailer owners, small-fleet operators, and repair shops replacing worn or damaged SW4-style springs on tandems or single axles rated up to 5000 lb. The clear dimensions and capacity make it suitable when the original spring spec matches these numbers and when customers want a direct, economical swap.

Those who should look elsewhere include owners of trailers with nonstandard spring geometry, users needing leaf springs with different ride characteristics, or anyone requiring a premium symmetrical build; a few customers noted minor fit and alignment variability that could matter for precision restorations.

Pros & Cons

Pros

• Good value for money with confirmed fit and functionality for many users.
• Durable materials and an anti-rust coating improve longevity in exposed conditions.
• Easy to install in typical trailer setups when hardware and alignment are correct.

Cons

• Some buyers reported inconsistent build quality and minor asymmetry between leaves on different springs.
• Installation can be compromised if other hardware such as u-bolts is worn or strips out, so complementary parts may need replacement.

Specifications

Replaces Part Number	Replaces SW4
Includes	2 x 4-leaf double eye springs
Capacity per Spring	2500 lb (5000 lb combined)
Eye to Eye Length	25-1/4 in
Free Open	3 in
Leaf Width	1-3/4 in
Eye Diameter with Bushing	9/16 in

Our Verdict

The 4 Leaf 2500lb Double Eye Spring is a pragmatic replacement for trailers needing SW4-style springs, offering the correct capacity and clear dimensions at a reasonable price. It represents good value for most routine trailer repairs, though buyers should inspect mounting hardware and be prepared for occasional fitment adjustment if parts show wear.

Frequently Asked Questions

Will these springs fit my trailer hangers?
Check that your existing eye-to-eye length is 25-1/4' and that the 9/16' bushing diameter and 1-3/4' leaf width match your hangers for compatible fit.

Are these springs sold as a pair?
Yes, the kit includes 2 x 4-leaf double eye springs, providing the pair needed for a single axle rated to 5000 lb when both springs are installed.

Should I replace u-bolts when installing?
It is recommended to inspect and often replace u-bolts and related hardware, since several users reported issues when old or damaged fasteners were reused.