Sumitomo ST778+ SE Commercial Truck Steer Tire - Long Haul, EPA SmartWay Verified

The Sumitomo ST778+ SE is a Premium Series, EPA SmartWay Verified commercial truck and bus steer tire purpose-built for long haul and line haul operations. Engineered with Sumitomo's proprietary S-Tech Flat Contact Technology, this tire line is designed to maximize tread life, promote even wear across the full service life, and reduce rolling resistance — delivering measurable cost-per-mile savings for fleet managers and owner-operators.

Key Features:

• S-Tech Flat Contact Technology: Controls footprint shape and pressure distribution to minimize irregular wear and extend tread life throughout the tire's full service life
• Wide Solid Closed Shoulder Ribs: Maintain even pressure distribution across the contact patch, supporting low rolling resistance and consistent, even wear
• Narrow Shoulder Grooves with Flat Tread Radius: Work in tandem to manage and control irregular wear patterns across the tread surface
• Four Circumferential Grooves: Assist with water evacuation to reduce hydroplaning risk in wet-weather conditions
• Micro Sipes: Protect interior tread ribs from punch wear while improving grip and traction in varying weather conditions
• Stone Ejectors: Embedded in tread groove bases to protect the casing from cuts, chips, and punctures caused by stone retention
• Advanced Dual-Compound Tread: A durable outer compound maximizes wear life while a cool-running base rubber minimizes heat buildup, supporting casing integrity and retreadability
• Four Steel Belt Package: Resists punctures, increases vehicle stability, and contributes to more retread cycles — extending the overall value of each tire
• EPA SmartWay Verified: Low rolling resistance construction meets SmartWay standards, contributing to improved fuel economy and reduced fleet emissions

The "SE" designation signifies that this tire carries full EPA SmartWay Verified status, reflecting Sumitomo's commitment to engineering low rolling resistance into its Premium Series long haul patterns. The S-Tech casing architecture, combined with reduced rolling resistance, supports long mileage to removal, excellent durability, multiple retread cycles, and reduced fuel cost across the life of the tire.

Backed by Sumitomo's decades of commercial tire engineering expertise — rooted in a heritage dating back to 1909 — the ST778+ SE is an ideal choice for fleet operators and owner-operators who demand consistent steer axle performance, extended wear life, and lower operating costs mile after mile.