Big Ken, thanks for taking the time to submit a review. We're sorry that your tires are in need of replacement. Treadwear is determined by the following factors: Type of vehicle (heavier vehicles will wear tires more rapidly), Driving habits (aggressive driving accelerates wear), Driving style (in-town driving results in quicker wear rate than highway driving), Geographical location (tires wear quicker in a mountainous region), How vehicle is maintained (regular alignment/suspension checks), How tires are maintained (proper air pressure and rotations)