Are Longer U-Bolts Required for Thicker Leaf Springs
Updated 09/26/2025 | Published 05/03/2025
Question:
I currently have an Arctic Wolf fifth wheel with leaf springs with 4 leaves. If I upgrade to the 6 leaf springs will I need longer u bolts? The ones in it now I believe are 7
asked by: Sean
Expert Reply:
Hey Sean! The best way to tell is by measuring on your current setup. The leaf thickness on the 6-Leaf Double-Eye Spring for 6,000-lb Trailer Axles # e94SR is 3/8" (this is standard). Check your U-bolts and see how much thread is exposed on them. As long as you have an additional 3/4" on there you can use what you have now. Feel free to reply below if you have any other questions.
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Product Page this Question was Asked From
6-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 26" Long
- Trailer Leaf Springs
- Double Eye Springs
- 9/16 Inch Eye
- Nylon Bushings
- 6000 lbs
- 1-3/4 Inch Wide
- 6 Leaf
- 26 Inch Long
- Standard Grade
- etrailer
more information >
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Robin H.
9/26/2025
Hey Sean, did you have a chance to measure the thread on your U-bolts to see if you have the extra 3/4 inch needed for the 6 leaf springs? I'm asking because your experience could help others looking to make similar upgrades.