How To Determine Hanger Spacing For A 2-1/4" Long Leaf Spring

Updated 11/03/2025 | Published 12/29/2024

Question:

I have your APT4 hanger kit. What would the hanger spacing be for this spring?

asked by: Rob D

Expert Reply:

Hey Rob, thanks for reaching out. I can provide rough guidelines for you, but there is not a specific hanger spacing for the # TRU25FR leaf spring. Generally speaking, the hanger spacing for a 25-1/4" long spring will be around 27 or 28", but you can only use that measurement as a rough guideline. The true spacing can only be determined by mocking up all the suspension components first before permanently installing everything.

In order to determine the correct leaf spring hanger locations on a trailer you first need to position the axles correctly. I have attached a help article on this part of the process. Then, once the axles are correctly positioned you can then mock up the suspension using the equalizers, shackle straps, and leaf spring. The mock up should then give you a good idea where your leaf spring hangers will sit. Refer to the article and picture I linked below. Let me know if you need anything else.

expert reply by: Jesse M

How To Determine Axle Position
(click to enlarge)

Jesse M.

11/3/2025

Hey Rob, how did things go when you mocked up the suspension to find the right hanger spacing for your leaf springs? Your results could really help others trying to dial in their trailer setup.