Coil SumoSprings CSS-1094
Measured coil gap: 11/16–7/8 in
Front or rear, subject to confirmed application
View exact product and conditionIdentify Coil SumoSprings CSS-1094, CSS-1168 & CSS-1195
Coil SumoSprings are progressive microcellular urethane inserts that sit between turns of a compatible coil spring. Unlike a replacement suspension spring, the insert works with the original spring as it compresses. Choosing the right part begins with the actual open gap between the middle coils, not a guessed vehicle-year application. This guide compares three manufacturer sizes offered by UsedRVParts.
Measure the coil gap before selecting an insert
SuperSprings International instructs customers to measure the gap in the middle of the coil spring with the vehicle resting at its normal ride height, without raising it for the measurement. Measure both sides; the manufacturer advises that the two measurements should be within ¼ inch of each other. Round the measured gap down to the nearest 1/16 inch and select the matching manufacturer range.
Measure the free space between the adjacent coils—not wire thickness or total suspension height.
Coil SumoSprings comparison by manufacturer number
| MPN | Coil gap | Decimal gap range | Application position |
|---|---|---|---|
| CSS-1094 | 11/16–7/8 in | 0.6875–0.875 in | Front or rear, subject to confirmed application |
| CSS-1168 | 1 7/16–1 5/8 in | 1.4375–1.625 in | Manufacturer lists front applications |
| CSS-1195 | 1 11/16–1 7/8 in | 1.6875–1.875 in | Front or rear, subject to confirmed application |
These three sizes do not cover every coil gap. SuperSprings also publishes other Coil SumoSprings sizes, including models between the ranges shown here. If the measured gap falls between these models, do not stretch, stack or cut an insert to compensate. Select the correct size from the manufacturer's full fitment chart.
Can these inserts be used at the front or rear?
CSS-1094 and CSS-1195SuperSprings lists these models for qualifying front and rear coil-spring applications. The exact position depends on the coil's measured gap, vehicle application and available clearance—not merely the fact that the vehicle has coil springs.
CSS-1168The manufacturer's current Coil SumoSprings selector lists CSS-1168 for front applications. Do not infer rear compatibility from a broad catalog description. Verify the actual vehicle and spring before fitting.
What the material does
Coil SumoSprings use microcellular urethane to provide progressive resistance as a coil spring compresses. Properly selected inserts can help reduce loaded sag and suspension movement. They do not require an onboard air compressor, inflation valves or air hoses, and the kits listed here include two inserts.
Installation and safety checks
- Confirm the measured unloaded spring gap. Measure at normal ride height in the middle turns, compare both sides and round down to the nearest 1/16 inch as directed.
- Choose the actual MPN. Compare CSS-1094, CSS-1168 and CSS-1195 with their specified ranges. An insert sized for a wider gap is not automatically an upgrade for a narrower gap.
- Check the vehicle and axle position. Confirm manufacturer's fitment for the specific front or rear coil spring. Modified, lowering or lifted suspensions can change the gap and clearance.
- Inspect suspension clearance. Check brake hoses, cables, steering movement, shock absorbers and full suspension travel. Do not install where the insert can snag or contact unsafe moving components.
- Follow safe installation procedures. SuperSprings instructions call for safe vehicle support, wheel chocks and the proper installation steps. Avoid handling a loaded spring or raising an unsupported vehicle.
- Respect factory ratings. Coil SumoSprings do not increase the manufacturer's GVWR, axle ratings or legal payload. They supplement suspension behaviour rather than replace damaged original suspension parts.
Find the exact Coil SumoSprings kit
Each card links to the matching UsedRVParts.ca listing. Confirm current condition and availability before ordering. The store carries both new and used parts; eligible used items can be viewed or collected by appointment in Kelowna.
Coil SumoSprings CSS-1168
Measured coil gap: 1 7/16–1 5/8 in
Manufacturer lists front applications
View exact product and condition
Coil SumoSprings CSS-1195
Measured coil gap: 1 11/16–1 7/8 in
Front or rear, subject to confirmed application
View exact product and conditionOther types of suspension assistance
Coil inserts are not the same as frame-mounted rubber helper springs, replacement coil springs or air-spring assemblies. Choose based on the suspension design and exact application, rather than treating them as interchangeable.
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