Coil Spring Enhancement Made Simple
Download the Printable Gap Tool to Find the Right Coil SumoSprings for You
Smarter than spacers. Simpler than airbags. Stronger support where it counts — right inside your coil springs. Find the right size Coil SumoSprings for your vehicle by downloading the printable coil gap tool below.
Coil SumoSprings fit inside your coils — and quietly transform your suspension.
Designed to Support. Engineered to Disappear.
Built from our proprietary microcellular polyurethane, Coil SumoSprings compress under load to deliver real spring support without affecting ride comfort. They install between the coils with no cutting, no drilling, and no air plumbing. As your suspension flexes, they compress progressively — absorbing shock, reducing sway, and helping the vehicle stay level and predictable.
Made in the USA. Designed for a lifetime of load-bearing performance.
Built to Handle Heat, Weight, and the Long Haul
Tough from the Inside Out
More support. Better comfort. No compromise.
A Smarter Upgrade Than Coil Spacers
Coil SumoSprings, by contrast, work with your existing coil spring to add a progressive spring rate. They compress under load to provide real support, help the coil recover faster, and reduce stress on the suspension. The result is better ride control, smoother handling, less sway, and a suspension system that lasts longer — all without the drawbacks of traditional spacers or air systems.
Built for real-world loads — and backed for life.
Trusted by Drivers, Installers, and Industry Pros
Confidence for Every Corner and Cargo
Built for Loaded Vehicles and Real-World Driving
Coil SumoSprings are ideal for vehicles that frequently carry passengers, cargo, or equipment that push factory coils to their limits. From passenger vehicles with full back seats to vans filled with tools, these upgrades add the stability, height retention, and ride quality that spacers and stock setups just can’t match.
They’re especially effective for SUVs carrying rooftop tents or camping gear, light trucks with mounted equipment, and off-road builds that demand smoother trail performance without sacrificing travel. Once installed, Coil SumoSprings require no adjustment or upkeep — they’re the set-it-and-forget-it upgrade that transforms your suspension for the long haul.
FIND THE RIGHT SIZE COIL SUMOSPRINGS FOR YOUR VEHICLE
Measure the gap between in the middle of the coil. Enter the measurements below for the right fit. Take the measurement with the vehicle as it sits. You do not need to raise it. Ensure that each side of the vehicle is within 1/4″ (0.25″) measurement of the other.
Don’t want to download our printable gap tool? Measure the gap between the middle coil of your vehicle, and round your measurement down to the nearest 1/16″.
