ICON Triple-Rate 3-3.5-Inch Rear Springs | 2022-2026 Toyota Tundra

These are the rear coils for ICON’s 6-inch third-generation Tundra system, not a generic 3.5-inch spring. The triple-rate design gives the axle a softer droop/ride zone, then brings in a firmer overload rate as the truck gets deeper into compression.

Lift depends on the truck underneath them: expect about 3 inches over stock on TRD Off-Road, TRD Sport, TRD Rally and TRD Pro models, and roughly 3.5 inches on most non-TRD coil-spring Tundras. They are not compatible with the factory load-leveling rear air suspension.

That distinction matters on a travel truck. A spring that can move when lightly loaded but gains support when the bed is full is far more useful than a single stiff rate chosen only to hold ride height.

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