What is the Minimum Clearance Allowed Between a Trailer Axle and the Trailer Frame?
Updated 09/02/2025 | Published 08/08/2025
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Question:
i am building a car trailer, i want to stay low to the ground. i am using leaf springs and 7k Lippert axles and springs. How much clearance do i need from the top of the axle to the trailer frame to go underslung?
asked by: Cody
Expert Reply:
Hey Cody!
You want to maintain a minimum of 4" clearance between the axle and your trailer frame to account for suspension flex in the leaf spring.
How far along are you in the planning process? It sounds like you're trying to keep the ramp from being too steep when you're loading your vehicle. We've got Race Ramps like the part # RR-TR-4 that can assist with that as well!
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Product Page this Question was Asked From
3-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 23-1/8" Long
- Trailer Leaf Springs
- Double Eye Springs
- 9/16 Inch Eye
- Nylon Bushings
- 3500 lbs
- 1-3/4 Inch Wide
- 3 Leaf
- 23-1/8 Inch Long
- Standard Grade
- etrailer
more information >
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Jon G.
9/2/2025
Hey Cody, Did you find the 4-inch clearance recommendation helpful for your trailer build? I'm curious to know how your project is coming along and if the Race Ramps were a good fit for your needs. Let me know how it's going, as your experience could be valuable for others working on similar projects!