- Unique Open shoulder directional tread Design Delivers excellent traction in All weather and road conditions - Multi-extruded tread package Promotes cooler running, Which Helps to preserve casing Integrity - robust casing Design with stone ejectors Preserves The casing, maximizing service life - offset shoulder blocks with ties help keep The tread stable, providing long tread life - Deep original tread for excellent mileage in long and short Haul applications - heavy-duty casing for strength, stability and The promotion of retreading - EPA SmartWay Verified