What is the Spacing Between the Front Hanger and Rear Hanger for 27" Leaf Spring Single Axle Trailer

Updated 01/28/2025 | Published 01/27/2025

Question:

E36VF: What is the recommended spacing center of front spring hanger hole to center of rear hanger hole for this 27inch long spring? Thank you.

asked by: Jim C

Expert Reply:

Hello Jim,

Great question! Because there is not a real standard to trailer suspension I do not have a direct answer for the spacing for the hangers to install the # e36FV. It all depends on what size shackle you are using, if the spring is over or under the axle. Most likely your measurement is going to fall between 25 1/4" to 26 1/2". You want to make sure your shackle strap is at a 40-50 degree angle. I attached a picture of what single axle suspension should look like, I know it's weird going off "looks like" but that's the way to do it. I have also attached a great help article that we have about trailer suspension.

I really wish I could give you a direct answer with "this many inches." Are you building a trailer from scratch or upgrading the suspension on an older trailer?

expert reply by: Kate F

Single axle suspension.
(click to enlarge)

Jim C.

1/27/2025

Thanks for the reply, Kate. Retired mechanical engineer building a trailer from scratch. I would think that E-Trailer would have the load - deflection data for this spring or access to the manufacture's recommended hanger spacing. I'll load the spring in my hydraulic press and work out the spacings. Jim C.

Kate F.

1/28/2025

@JimC I agree Jim, it was very weird to get used to there not being a standard. But with the different size shackle straps, hangers, leaf springs, equalizers (if more than one axle) it makes sense. Just too many combinations out there. That sounds like a great project and will definitely keep you busy. Please send me a picture when you get things completed, I am eager to see your finished product.