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  1. Trailer Leaf Springs
  2. EMCO
  3. Slipper Springs
  4. 30 Inch Long
  5. 1800 lbs
  6. 2 Leaf
2-Leaf Slipper Spring w/ Flat End for 1,800-lb Trailer Axles - 30" Long
EMCO

2-Leaf Slipper Spring w/ Flat End for 1,800-lb Trailer Axles - 30" Long

Part Number: EM56AJ
In Stock
$50.96
Trailer Leaf Springs
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USA-made slipper leaf spring acts as part of your trailer's suspension system providing an attachment point for a 1,800-lb axle. Spring flexes to resist shock while ensuring a smooth ride. Includes bushing with 9/16" inner diameter. Great Prices for the best trailer leaf springs from EMCO. 2-Leaf Slipper Spring w/ Flat End for 1,800-lb Trailer Axles - 30" Long part number EM56AJ can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (29)
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EMCO Trailer Leaf Springs - EM56AJ

Highlights

  • Supports 1,800-lb Axles: Handles up to 900 lbs per spring for balanced trailer suspension.
  • 30" Long, 1-3/4" Wide: Proper fit for standard hanger setups and stable axle placement.
  • 2-Leaf Slipper Design: Flexes to absorb road shock for a smoother, quieter ride.
  • 9/16" Eye with Nylon Bushing: Provides a snug, low-friction pivot for consistent movement.
  • Sturdy Steel Build: Resists wear from heavy loads and rough roads over long use.
  • Flat Slipper End: Slides into rear hanger or equalizer for secure, simple attachment.
Made in USA

Features to know about

Smooth Ride on Rough Roads: 2-Leaf Slipper Spring Flexes to Absorb Shock

Long trips and uneven roads can make a trailer bounce and jolt. This 2-leaf slipper spring flexes under load to absorb road shock, keeping the ride smooth and steady. It acts as part of the suspension system for a 1,800-lb axle, helping reduce wear and tear on the trailer and keeping things level even on bumpy surfaces.

Reliable Support for Everyday Use: 900-lb Spring Capacity per Side

Each spring carries up to 900 lbs, working together to handle an axle capacity of 1,800 lbs. With sturdy steel construction and a 3/8" leaf thickness, it’s built to manage regular hauling without sagging or losing shape. It gives dependable support mile after mile, whether you’re on pavement or rougher roads.

Easy Connection for Secure Mounting: 30" Long with 9/16" Eye

Getting the fit right matters for proper suspension movement. This spring measures 30" from the center of the eye to the end, with a 1-3/4" width that matches standard hangers. The front eye includes a 9/16" nylon bushing for smooth rotation on the suspension bolt, while the flat slipper end slides cleanly into the rear hanger or equalizer for a solid connection.

Built for Simple Replacement or Fabrication: Works with Hanger Kits

Whether you’re swapping out worn springs or building a new setup, this design makes it straightforward. It fits hangers that are either pre-mounted or part of an aftermarket kit (sold separately). Replacing both springs at once ensures even alignment and consistent performance, keeping your suspension geometry right where it should be.

Specs

Quantity and Capacity

  • Quantity: 1 leaf spring
  • Spring capacity: 900 lbs
  • Axle capacity: 1,800 lbs

Dimensions

  • Length from center of spring eye to end of spring (unloaded): 30"
  • Spring width: 1-3/4"
  • Eye diameter with bushing: 9/16"
  • Eye diameter without bushing: 7/8"
  • Leaf thickness: 3/8"
  • Number of leaves: 2
  • Additional dimensions: see table

Part Number A B C D E
TRU42FR 16-1/2" 30" 15" 17-3/4" 4-7/8"

Technical diagram of EMCO 2-leaf slipper spring with flat end for 1,800-lb trailer axles, showing labeled dimensions A through E for eye-to-end, overall length, and other key measurements.

  • A: 16-1/2"
  • B: 30"
  • C: 15"
  • D: 17-3/4"
  • E: 4-7/8"

Note

  • Important: To ensure proper axle alignment and suspension performance, leaf springs should always be replaced in pairs.

WID-2 TruRyde EMCO Slipper Trailer Leaf Spring - 2 Leaf - 900-lb Capacity

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Customer Satisfaction Score:

Ratings & Reviews

4.9

29 reviews
Review sort icon
USA-made slipper leaf spring acts as part of your trailer's suspension system providing an attachment point for a 1,800-lb axle. Spring flexes to resist shock while ensuring a smooth ride. Includes bushing with 9/16" inner diameter.

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came packaged as it should safe and sou nd



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Perfect fit, great softer spring for my light use trailer.



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Spring was fine, had to modify due to being to long. Needed 22 inch, and ordered a 24 in. My mistake.



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cheap but seem good quality



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very well made, trailer feels much smoother on the road.



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Perfect fit! Better load carrying capability (3 leaf replacement for 2 leaf springs). The right part for the job! I rebuilt my King boat trailer for a 16 ft Lund skiff with 30 hp Yamaha outboard. Austin B at etrailer (Thanks Austin) helped me determine fitment. While this was only one part of the rebuild it was a strategic choice. Now I can carry all my extra gear in the boat when it’s on the trailer and springs are not overloaded!



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Perfect replacements! BERY easy to measure for and order.



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perfect fit very reasonable price and excelant service



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It fit the trailer!



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I was amazed at how quickly they arrive d.



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Fast and just what I ordered



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Express delivery. Perfect fit!



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Good product fast delvery



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Looks to be just what I ordered for my trailer re-build.

Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

1/8/2026

Good luck on the re-build, Tim! How much more do you have left to do?


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See what our Experts say about this EMCO Trailer Leaf Springs


Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B

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