Low-Cost Method to Raise Height of Trailer with 3500-lb Axles


I am looking to replace a pair of braked axles on an enclosed trailer for straight axles so I can gain some lift for off-road clearance. I want to keep the brakes and hubs to keep costs down. Can you suggest a compatible straight axle that will allow me to keep the brakes and possibly hubs? Picture of axle tag attached. 5-4.5 bolt pattern Bearings: Outer- Cone:L44649 Cup:L44610 Inner- Cone:L68149 Cup:L68111 Seal:1.72IDx2.565OD Thank you.


Expert Reply:

There is a fairly simple and low-cost method for raising the height of a trailer that does not require replacing the axles. This method consists of installing an "over-under" kit on each axle. These bolt-on kits let you move the leaf springs to the tops of the axles. Doing this gives you a height gain equal to the sum of the axle diameter plus the height of the leaf spring stack.

Round 3500-lb axles such as your Lippert axles are usually a 2-3/8-inch diameter. For example, let's say your leaf spring stack is 2-inches tall. If you were to install Over-Under Conversion Kit # K71-384-00 on each of the axles you would raise the trailer by 4-3/8-inches.

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expert reply by:
Adam R

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