general problems of the 2000 Mazda B4000

Pe#00020; wilderness ht, p225/70r15, dot#w2uuip629. After having all four tires inspected by a technician, consumer discovered that all four were defective. Tires have radial and lateral runout. Excessive vibration was felt when driving. Tires were the original tires purchased with vehicle. Vehicle is a Mazda truck, B4000, 2000.

I am concerned since at recommended tire pressure the both the inner and outer ribs are rounding prematurly and it is starting to go out of ballance which deffinately means the tires are changing configuration. Why has Mazda not been involved in the tire recall since they use the same tires on their vehicles?( dot number: tire size: r15x235 ).