Coil SumoSpring – Improving F-350 Front End Performance

by | Jul 2, 2022

We had good success adding SumoSprings to our 5th wheel axles to manage the road shock felt from the bad roads. We contacted SuperSprings International to see what could be done to improve the front end performance of our Ford F-350 ton dually. We were glad to discover Coil SumoSprings were available.

What Are Coil SumoSprings?

Coil SumoSprings are made from the same material as the SumoSprings we installed on our Montana 5th wheel. The micro-cellular polyurethane that is used decreases vibration, stabilizes sway, and tightens up existing factory coils. This is an added benefit for older trucks that have mileage ad the coil springs may have compressed over time loosing some mass and ability to manage poor road conditions. Our expectation for this upgrade was to add additional capacity to our front end coil springs, creating a cushion effect and stopping unwanted dip and rocking when we hit uneven pavement and bridges during our RV travel.

Installing The Coil SumoSprings

The Coil Sumo Spring installation was the simplest RV project we’ve done since we started our travel. In less than thirty minutes from start to finish and requiring nothing more than a jack and a spray bottle with a little water and dish detergent to lubricate the springs.

To order the Coil SumoSprings, a website contains the instructions of how to measure to ensure the springs will fit properly. If you have a truck with some mileage, the front springs may have compressed to some degree. The Coil SumoSprings are very dense and will not fit between the spring spacing if the wrong size is ordered. SuperSprings International provides simple instructions and a helpful chart to use here to help you find a set of Coil SumoSprings for your application.

We used a floor jack to lift the frame of truck just enough to take the pressure off the springs. A bottle jack could be used, but recommend securing the truck with a jack stand if used. Turning the wheels to access the springs, spraying a little diluted dish detergent on the springs, and the Coil SumoSprings slipped in place.

Coil SumoSprings Results

In the video below, we take you on our first drive towing our 19,500lb Montana along a bad stretch of I-285 north of Atlanta. We experience long sections of uneven concrete, broken and missing concrete, poor bridge access and departure – overall this section from I-20 to I-85 is a mess.

We didn’t expect the Coil SumoSprings to create a luxury vehicle ride, but are able to report the ride was much improved, dampening the road hazards experienced and with the added SumoSprings on the 5th wheel axles, dampening the front to back rocking from uneven roads.
This is a very inexpensive upgrade, simple install and improved our handling of bad roads when towing our 5th wheel.

installing coil sumosprings
Helpful Links:
Not sure about what RV accessories you need as you start RV travel?
RV AccessoriesCheck out our RV Accessories page where we have listed a wide range of products from essential items to those “nice to have” RV products to make RV life more enjoyable. Every item listed is being used or has been used by Joan and I as we’ve traveled across the country in our RV.
Receive the latest updates from I Love RV Life!

Sign up to receive an email notification as we post new RV travels, RV tips and information about RV life in general. It’s simple. Just enter your name and email address on the Subscribe to our newsletter form located at the top right side of this page and click subscribe.

Purchased use of Digital Juice BackTraxx 1 End User License Agreement for Travelin. The Music may be used, altered, or incorporated according to the guidelines described herein into any production (including but not limited to, broadcast, commercial, industrial, educational, and personal).


ilovervlife travel map

RV Accessories

Epoch Batteries

Active Control RV Soft Start

RV Mattress - Brooklyn Bedding

Haloview Backup Camera

Oupes Portable Power Stations

TST and TechnoRV

Antler Roots Outdoors

RV Mobile Connect

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.

We are a participant in the affiliate advertising program for the following companies: Active Controls, Brooklyn Bedding, Epoch Batteries, BougeRV, ALLPOWERS, HOVSCO, CyCrown, TROXUS, LiTime, LANPWR, and Escapees RV Club. Each affiliate advertising program is designed to provide a means for us to earn fees by linking to each company's affiliated sites.