Sumitomo ST508 Commercial Truck All-Position Tire

The Sumitomo ST508 is a medium-duty commercial truck and bus tire engineered for all-position use in demanding mixed-service environments. Purpose-built for fleet operators who require reliable, long-lasting performance, the ST508 delivers a proven combination of durable casing technology, advanced tread engineering, and retreadability — all designed to reduce total cost of ownership over the full lifecycle of the tire.

Advanced Casing Construction:

• All-steel casing resists punctures, enhances vehicle stability, and supports multiple retread cycles to maximize tire lifecycle value
• Special steel coating technology shields internal steel cables from rust and corrosion, preserving long-term structural integrity
• Proprietary liner compound helps prevent moisture intrusion into the casing, reducing the risk of internal corrosion and damage
• Retread-friendly design supports multiple usable retreading cycles, lowering per-mile operating costs for commercial fleets

Tread Performance Technology:

• Patented tread compound resists cutting and chipping for consistent durability across mixed-service conditions
• Computer-designed zigzag groove pattern channels water away from the contact patch to boost wet traction and improve hydroplaning resistance
• Closed shoulder design improves surface contact for enhanced handling stability and even tread wear across all positions
• Optimized tread architecture resists casing failures, supporting dependable performance throughout the tire's full service life

The ST508 is backed by the Sumitomo Tire Limited Warranty, giving fleet managers added confidence in their investment. Available in a range of sizes to suit a variety of medium-duty commercial truck and bus applications, the Sumitomo ST508 is a trusted, cost-effective choice for fleets that operate in mixed on- and off-highway service conditions.