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Sumitomo St778/st778se Tires

Commercial Truck/Bus. SmartWay Verified (ST778SE only). Medium-Duty Truck Premium Series Long Haul Steer tire.


  • Unique teardrop shaped decoupling groove
  • Micro edge sipes
  • Stone ejectors in base of tread
  • Wide shoulder elements and improved tread compounds
  • EPA SmartWay Verified (ST778SE only)


  • Reduces shoulder strain and prevents tearing
  • Reduce irregular wear resulting in dramatically improved treadwear
  • Promote casing integrity
  • Deliver superior mileage
  • Low rolling resistance and fuel saving


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