Replacement 25-1/4" Long 4-Leaf Leaf Spring for a Lippert 129745 Leaf Spring
Updated 06/01/2026 | Published 05/26/2026
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Question:
My factory spring is a lippert 129745 4400 pound I’m wanting to upgrade to a heavier spring but not sure what spring there are to many options with little explanation of difference for price for what seem to be equal springs
asked by: Daniel R
Expert Reply:
Hey Daniel thanks for the information! To upgrade your Lippert 129745 2,200 lbs leaf spring for a 4,400 lbs axle, I recommend the 4-Leaf Double-Eye Spring item # TRU25FR.
The 4-Leaf Double-Eye Spring item # TRU25FR is the same length at 25-1/4" long from the center of the mounting bolts. It's also a 4-leaf spring that's 1-3/4" and sold individually. It has a bit higher capacity though at 2,500 lbs. This will give you a slight upgrade that won't make your suspension stiff or uncomfortable.
When you swap out your leaf springs, you'll also want to switch out your hardware as those wet bolts are only meant to be torqued down once. You'll want to pick a kit with the closest size to your current shackle straps.
The MORryde Suspension Upgrade Kit for Tandem Axle Trailers item # MR46ZR is for 2-1/4" shackles or item # MR76ZR is for 3-1/8" shackles. These kits come with the bronze bushings, wet bolts and shackle straps.
What issues are you running into that has you looking to upgrade to higher rated leaf springs?
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Product Page this Question was Asked From
4-Leaf Double-Eye Spring for 5,000-lb Trailer Axles - 25-1/4" Long
- Trailer Leaf Springs
- Double Eye Springs
- 9/16 Inch Eye
- Nylon Bushings
- 5000 lbs
- 1-3/4 Inch Wide
- 4 Leaf
- 25-1/4 Inch Long
- Standard Grade
- EMCO
more information >
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on Trailer Leaf Springs
