TBC Wholesale recently enhanced its Sailun medium truck tire warranty to provide additional confidence to truck owners and tire distributors. Some of the upgrades include free tire replacement period extended to 50% of the original tread life if the tire becomes unserviceable due to workmanship or material defects. The enhancements cover all Sailun brand medium radial truck tires including the EFT (Environmentally Friendly Technology) series of fuel-efficient tires.