Can A 3 Leaf Spring Be Replaced With A 4 Leaf Spring?
Updated 09/15/2025 | Published 08/23/2024
Question:
Concerning my 2018 Cruiser RV Funfinder extreme lite 26RB. Can I randomly update from a 3 leaf to a 4 leaf spring as long as the dimensions are identical? Is there any safety issue to oversizing?
asked by: John Z
Expert Reply:
Hello John. When replacing leaf springs, the important thing is to make sure the eye-to-eye length of the spring stays the same. We also want to make sure the spring has an appropriate weight rating for your axle. As long as these specs match, it is fine to go from a 3 leaf to a 4 leaf.
To add stability, some people will upgrade to higher rated springs, which can be done, but we do not want to overshoot the weight rating by too much. If the spring is rated too high, it will not flex and it will cause your ride to be very rough.
Let me know the eye-to-eye length of your springs, as well as the weight capacity of your axle and I am happy to look into it and see if we have any springs for you.
Jesse M.
9/15/2025
Product Page this Question was Asked From
Rubber Triangular Seal for RVs - Stick On - 15' Long x 7/16" Tall
- Trailer Door Parts
- Seals
- Triangular Seals
- 7/16 Inch Tall
- Stick-On
- 7/16 Inch Wide
- 15 Foot Long
- Rubber
- Steele Rubber
more information >
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John
8/23/2024
I have a 3500 lb axle rating on both of the tandem axles. I cannot tell if the eye-to-eye length of the spring is 25-1/8 or 25-1/4. Is it crucial to have this exactly or will either do? I see your website offers both.