Recommended Helper Springs for a 2026 Alliance Avenue 5th Wheel RV

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

Products Featured in This Question

SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Underslung

(66)

$320.99

SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Overslung

(310)

$279.58

Question:

I need your recommendations for springs for a 2026 Alliance Avenue 5th Wheel RV (dual 7K pound axles) that has a GVWR of 15,000.

asked by: Kent S

Expert Reply:

Hey Kent, congrats on the new 5th wheel trailer. For your 2026 Alliance Avenue 5th Wheel, I have two options for springs depending on how your axles are orientated with your leaf springs.

If your axles sit above your leaf springs, (underslung) you'll need the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket item # SS33HR. You'll need to have 7-7/16" - 8-5/8" of space between the top of the spring plate and the bottom of your trailer's frame.

If your axles sit below your leaf springs, (overslung) you'll need the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket item # SS26MV. You'll need to have 5-5/16" - 6-1/2" of space between the top of the spring plate and the bottom of your trailer's frame.

Both of these spring kits are sold individually so you'll need two sets. They're are rated for axles up to 8,000 lbs.

Are your axles above or below your leaf springs?

You can add this information, along with any other questions you have, where it says Reply to Jerred H.

expert reply by: Jerred H

Overslung
(click to enlarge)

Jerred H.

12/29/2025

Hey Kent, what did you find out about how your axles sit on the Alliance Avenue 5th wheel? Once you confirm that, it’ll be clear which SumoSprings kit is the right match. Let me know what you discover—I can help from there.