Sumitomo St778+ SE Tires

Commercial Truck/Bus. SmartWay Verified Medium-Duty Truck Long Haul Steer tire.


  • New S-Tech Flat Contact Technology
  • Shoulder grooves
  • Micro sipes
  • Advanced tread compounds
  • Stone ejectors
  • EPA SmartWay Verified


  • Reduces potential for irregular wear by controlling the shape and pressure distribution of the tire footprint
  • Work with the wide, flat tread radius to control irregular wear
  • Protect the interior ribs from punch wear
  • Even longer wearing tread compound on the outside, cool running base rubber compound on the inside
  • Protect the casing in base of the tread groove
  • Low rolling resistance for better fuel economy


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