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The SmartWay Verified Sumitomo ST778+ SE is a long haul steer tire. Its combination of features delivers excellent handling, superior miles to removal, and dependable retreadability. The Flat Contact Technology controls the shape of the footprint to ensure even pressure distribution so that tread wears slowly and evenly. In wet conditions, grooves remove water from the contact patch to improve hydroplaning resistance. Mico-sipes enhance grip on wet surfaces and reduce uneven wear.