Recommended 4,000 lbs Capacity 24-7/8" Long 7-Leaf Double-Eye Spring for 7,000 lbs Axles  

Question:

Helpful Expert Reply:

Welcome back Scott! I highly recommend using 4,000 lbs capacity leaf springs like our 7-Leaf Double-Eye Spring for 8,000 lbs Trailer Axles item # e89FV, which are 24-7/8" long. You will want to measure your leaf springs from eye to eye with the weight off of them to confirm this is the correct size.

Your 2021 Jayco Pinnacle 32RLTS has a gross weight rating of 15,500 lbs, which is why it came with 4,000 lbs springs. The 4,000 lbs springs like item # e89FV have a longer second leaf that extends all the way to the eyelet for additional support. This reinforces your suspension and prevents the leaf springs from flattening out and bending your axle eventually.

Installing 3,500 lbs leaf springs is going to make your suspension under capacity for your GVWR and cause them to flatten out sooner. Your RV Tech is correct on 3,500 lbs leaf springs being used on 7,000 lbs axles but that's when the axle capacity isn't exceeded by the trailer's weight.

The way your trailer's heavy slide outs are orientated above your axles puts most of the weight on the rear of your 5th wheel. To prevent further axle damage, I recommend upgrading your axles to 8,000 lbs capacity ones. Unfortunately, we do not carry axles over 7,000 lbs so I do not have a replacement option for you.

What kind of roads do you typically travel and do you store anything extra that's pretty heavy in the rear of your Pinnacle when you're on the road? Feel free to answer this and throw in any other questions you have, where it says Add Comment.

expert reply by: Jerred H

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e89FV
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Scott

9/7/2026

Hi Jerrod, Thank you for your intelligent, expert response. Tjese Pinnacle trailers are.pushing the safety envelope, especially with only 7k axles. I believe that I need to upgrade the suspension, and my plan was ti go with 8k axles. Unfortunately, I am in a remote location working, and the RV repair place here does not want to deal with axle upgrade. I did convince the shop to go OEM on leaf springs. Interesting that you mention slides, and weight. Looking at the floor plan, most of the weight seems to be from the fridge forward, which is just at the front axle. Everything towards the back beyond the fridge is lightweight. I'm talking dinette, oven, furniture, tv, fireplace, and empty living space. Typical travel for us is on interstates, and some secondary roads. Also, we do not store anything heavy in the rear of the trailer. Once trailer is repaired with another 7k axle, new leaf springs and wet bolts kit, we will head home. Don't have the time, or the $ to add Roadmaster shocks, or anythimg else. The rules of physics still apply, so driving slower, and reducing weight will help prevent further damage. Thank you!

Jerred H.

9/7/2026

@Scott You're welcome! I completely agree with you. The 7,000 lbs axles are significantly underrated once you get your trailer loaded up and ready to head down the road. Glad you were able to convince your repair shop to install the correct capacity springs. What they were saying about using 3,500 lbs leaf springs on a 7k axle wasn't necessarily incorrect but it does not apply to your situation at all. Ok, good. I'm happy to be wrong about that. The diagram I was looking at on Jayco's website made the slideouts look like they were directly over the axles. You're doing everything right then. Your plan to prevent further damage is exactly what I would recommend as well since new 8k axles and a Roadmaster shock kit aren't feasible options.

Scott

9/7/2026

@JerredH Thanks Jerrod! You are right about two of three slides over the axles, but lookong at what is in those slides is very ligjt, except the fridge. I guess I don't consider the slides heavy, based on what is inside of them, however, I have not considered the weight of the materials to make a slide, as well as the support structure, and movement mechanism. Thank you!

Jerred H.

9/7/2026

@Scott You're welcome! Yeah those slideouts are heavy with nothing sitting in them. The additional support and all the mechanisms sure do add up.