Trailer Leaf Spring 4 Leaf 2500lb for 5000lb Axle - Direct Fit

In this review the Trailer Leaf Spring 4 Leaf 2500lb set is evaluated for trailer owners who need a direct replacement for a standard 5000lb trailer axle. The bottom line: these springs are a practical, value-focused replacement designed to match original equipment lengths and capacities, with a heavy duty carbon steel construction and anti-rust coating that make them a sensible choice for routine repairs and restores. For anyone replacing overloaded or corroded springs, the set offers a clear capacity match and eye-to-eye dimensions that simplify installation.

Key Features

• Capacity: Each spring is rated at 2500lb so the pair suits a 5000lb trailer axle and restores rated load capacity when both sides are replaced.
• Exact fit dimensions: The 25-1/4in eye-to-eye length and 3in free open length match common OEM sizes for straightforward swapping with the listed replacements.
• Robust construction: Heavy duty carbon steel and a protective anti-rust coating improve transmission stability and help the springs resist corrosion over time.
• Mounting details: The four-leaf stack with 3/8in leaf thickness and 1-3/4in leaf width provides familiar spring geometry that fits existing hangers and U-bolt clamping methods.
• Replacement compatibility: These springs are specified to replace SW4, UNA218, PR4, 9150016, 93181 and related part numbers for an easier parts match.

Who It's For

This product is aimed at trailer owners, repair shops, and DIY mechanics who need a like-for-like replacement for a standard 5000lb trailer axle. Because the springs match common OEM lengths and eye diameters, they are well suited to trailers that show wear from overloading, cracking, or corrosion and require a full spring swap.

Those who should look elsewhere include owners of trailers with nonstandard suspension geometry or those needing specialty springs with greater travel or a different free height; if you need a higher capacity or a custom-length leaf, choose a spring specified for that application rather than this direct-fit set.

Pros & Cons

Pros

• Good value for money with a 2500lb capacity per spring that restores rated trailer capability.
• Direct fit dimensions and compatibility with common OEM part numbers reduce installation guesswork.
• Durable carbon steel construction and anti-rust coating for improved longevity in outdoor use.
• Includes PU-mounted holes for tougher hanger wear and more durable pivots.

Cons

• Some users have reported early failures under extreme use, so heavy commercial duty applications may need higher-spec springs.
• Free open travel of 3in may be limiting for trailers that require more suspension travel for off-road or highly loaded conditions.

Specifications

Capacity per spring	2500lb
Intended axle rating	5000lb trailer axle
Eye to eye length	25-1/4in
Free open	3in
Leaf count / thickness	4 leaves / 3/8in thickness
Leaf width	1-3/4in
Eye diameter	9/16in with bushing, 11/16in without

Our Verdict

The Trailer Leaf Spring 4 Leaf 2500lb set is a practical, cost-effective replacement for most trailers built around a 5000lb axle, offering direct-fit dimensions and durable carbon steel construction. It represents good value for routine repairs or restoring original ride geometry, but operators with extreme-duty needs should consider higher-capacity or specialty springs.

Frequently Asked Questions

Are these springs a direct replacement for common OEM part numbers?
Yes. They are specified to replace SW4, UNA218, PR4, 9150016 and 93181 style parts and match common OEM lengths and eye sizes.

What is the capacity and how many are included?
Each spring is rated 2500lb and the package includes two springs, matching a 5000lb trailer axle when both sides are installed.

What materials and coatings are used?
The springs are made of heavy duty carbon steel with an extra anti-rust coating and PU-mounted holes to improve corrosion resistance and hanger durability.