A Coil SumoSpring held open to show the edge

Are Coil SumoSprings Right for Me?

Tom Bateman Product Information Leave a Comment

The vast majority of vehicles on the road today utilize coil suspension in some way. But towing trailers, adding cargo boxes, and fitting rooftop tents can create a need for more out of your suspension. This article will give you an idea of how our Coil SumoSprings work, why they can help, and the best way to find the right set for your vehicle.

What are Coil SumoSprings Made of?

Coil SumoSprings are not rubber. They’re from the same material as our other SumoSpring products. A micro-cellular polyurethane that will never require any maintenance and they come with a lifetime warranty.

Because this isn’t a rubber solution, the performance is different. This is a progressive spring that has a soft initial engagement but as more weight is added, the more they push back. This provides support and control when you need it without negatively affecting your factory ride.

SumoSprings Compression Progressive Spring Rate Curve

How to Install Coil SumoSprings

Installing Coil SumoSprings is very simple. Besides some soapy water, it won’t require any tools to add them to your vehicle. Once the vehicle is jacked up with the wheel slightly off the ground, the Coil SumoSprings easily slide between the coils of your factory suspension. It’s that simple and this can add up to 30% additional capacity to the existing suspension on your vehicle.

What are the Benefits?

When most people think of addressing suspension issues, it has to do with rear-end sag or bottoming out. But that misses an important element of the driving experience – the front. Let’s talk about a few examples of how adding Coil SumoSprings to the front of your vehicle can change the ride.

Let’s say you have a Transit or a ProMaster van, and you’ve taken care of the sag in the rear. It’s likely that the van still dips in the front end when cornering, braking, and coming in and out of driveways. Adding Coil SumoSprings will alleviate that weight transfer and tighten up the front end of the van.

There are times when Coil SumoSprings might also be used as a full solution. For instance, where all four corners of your vehicle use coil suspension. Think of a family vehicle such as a minivan or Subaru. You’re adding bikes, tents, roof boxes, kids, and gear. Adding Coil SumoSprings prevents the vehicle from sagging or having top-heavy balance issues when driving. This lets you add all the weight and accessories without compromising ride quality.

Spring without a Coil SumoSpring Installed
A Spring with a Coil SumoSpring Installed

Selecting your Coil SumoSprings

So, it’s time to choose your Coil SumoSprings kit. We make our Coil SumoSprings in one density and in multiple different sizes. We’ve made it simple to measure and order the right kit for your coil setup, even if you’ve changed out your factory coils. With your vehicle parked on a level surface, measure the vertical distance between the two middle turns of the coils. No need to lift your vehicle to measure. Using our tool on the Coil SumoSprings page, you can select your coil measurement from the dropdown, and we’ll show you what kit to buy. 

Hopefully this article helps you better understand what Coil SumoSprings are and how they can help make the journey better on vehicles with coil suspension.

Check out this video where SSI President Adam Wesiner explains what Coil SumoSprings are and if they are right for you.

Use our application guide to see what we have for your vehicle.

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