6,000 lb Double-Eye Leaf Spring to Replace 25-1/4 Inch Long Spring

Updated 05/12/2023 | Published 05/10/2023

Question:

My new to me 2004 5th wheel broke a leaf spring, and I have started disassembly. This is a 2004 Forest River Cardinal 31 LE bunk model trailer. I have the good leaf removed on the driver side free to measure It is a 4 leaf spring. Eye to eye measures out to 25 1/4 in, depth from the eye to eye center line down to the top of the first leaf spring is 3 1/8. I suppose these measurements could be skewed, as they are 20 years old. The stamping on the band plate was RA 93115 7 29 04 I might assume the second line was the date the springs were made. The trailer dry weight is 9850 lbs, GVWR is 12,100 lbs. The spring rate on the unit sticker appears to be 5080, but im not sure. Either way, I think 6000 lb springs may be more appropriate. The number I found on the axle band was 5200 lb, so... that seems odd, but they are 3inch axles. AL-KO appears to be the brand. So, what springs do you suggest?

asked by: Scott L

Expert Reply:

Appreciate all that info, and since leaf springs flatten over time, you will want to get one a bit shorter than the 25-1/4 inch eye to eye measurement. For a 6,000 lb replacement the best option is the following:

- 4-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/8" Long # e47SR

Also keep in mind, to ensure your trailer rides evenly, that you do want to replace all of your leaf springs at the same time.

expert reply by: Kyle S