ST778SE long haul steer tire delivers exceptional handling for safe operation, dependable retread ability of the Sumitomo casing and remarkable miles to removal. It is designed with long wearing tread compound on the outside and cool running base rubber compound on the inside. Its thousands of micro sipes helps protect the interior ribs from punch wear while casing is also protected from damage in the base by its 4/32” stone ejectors. Irregular wear is minimized due to its Flat Contact Technology. It also has an S-Tech Design that makes it the next generation SMARTWAY Sumitomo long haul steer tire.