after purchasing tires and driving about 18, 000 miles the tires started to hum loudly at low speeds, I returned to wal mart and they told me it was in need of a front end alighment.ai then went and had a a=front end alighnment rotated the tires and they agin started to hum on the front wheels.i believe the tires are bad as i was told by a worker at goodyear tire (IWAS GETTING AN OIL CHANGE)he said wal mart had trouble with there wangler tire made for them.