Sumitomo ST709 Commercial Truck Regional Steer Tire

The Sumitomo ST709 is a medium-duty commercial truck regional steer tire engineered for demanding, high-scrub service environments. Purpose-built for fleet operators who require proven tread longevity, robust casing durability, and consistent on-highway performance, the ST709 line delivers dependable reliability across regional hauling, urban delivery, and bus operations.

The ST709 is part of Sumitomo's Premium Series and is built on proprietary S-Tech casing architecture — a technical platform engineered to deliver high mileage, inhibit irregular wear, improve driver satisfaction, and retain casing integrity through multiple retread cycles. The result is a lower total cost of ownership across the full service life of the tire.

Key Features:

• Wide, flat casing with generous tread depth — delivers increased rubber volume for extended service life in high-scrub regional environments
• Chevron block center ribs with lateral siping — cut water film from the contact patch to enhance wet-road traction and all-weather safety
• Thick curbing ribs — shield the sidewall and casing from damage during urban maneuvering, tight turns, and curbside operations
• Integrated stone ejectors — protect casing integrity at the base of the tread groove, preserving structural durability and long-term retreadability
• Innovative wear control design — helps manage irregular tread wear during on-highway use, promoting an even wear pattern across the full contact footprint
• S-Tech casing technology — Sumitomo's Premium Series architecture engineered for long tread life, casing durability, and support for multiple retread cycles

Select variants within the ST709 product line carry EPA SmartWay Verified designation, reflecting low rolling resistance design that contributes to improved fuel efficiency and reduced vehicle emissions — an important consideration for cost-conscious, environmentally responsible fleet operations. SmartWay Verified variants are identified by the SE suffix.

The Sumitomo ST709 line is well-suited for fleet managers seeking a dependable, long-wearing steer tire for high-speed regional transport, local pickup and delivery, school buses, equipment haulers, refuse trucks, and urban dump trucks primarily operating on paved surfaces.