PIB TIP: WARRANTY A FACTOR IN TIRES. Most standard new-tire and retread warranties have coverage limited to normal-use defects in workmanship, product and material. Warranties are based on time or wear, not mileage. Some fully cover the tire’s lifespan, or until tread wears to a specified thickness. Most warranties have buy-back plans for retreadable tires. Know exactly what the warranty is before you buy. The Partners in Business program is produced by Overdrive and the consultants at ATBS, the nation’s largest owner-operator business services firm, and is sponsored by Schneider National Inc. and Freightliner Trucks.