Closed Shoulder Drive
Closed shoulder drive tires are most commonly used in long haul and regional service applications where long mileage and fuel economy is most important. Many of the long-haul drive tires available on Tires-easy are EPA SmartWay fuel-saving certified thanks to rubber compounds and tire construction that lower semi-truck tire rolling resistance. These closed shoulder commercial traction tires like the Hankook DL07 tire have tread blocks with open circumferential grooves in the middle of the tread to evacuate water in wet conditions, but a solid rib on the edge of the tread to ensure long even wear and better fuel economy.
These tires are used on tandem drive axle tractor trailers in line haul, interstate regional service, as well as on single axle straight trucks in urban P&D applications where long tread-life and good fuel economy are most important.