I purchased a new set of yokohama 225/45r18 tornante tires in october 2016 from mr. tire. immediately following installation i experienced an excessive warbling noise from the tires and took the vehicle to a trusted tire shop. they found that the tread was wobbling from side-to-side when placed on the tire balancing machine and recommended i take it back to mr. tire for replacement. i did this and mr. tire said that the uneven tread was normal and refused to replace the tire. i proceeded to drive the vehicle 43,000 miles over a 2.5 year period and experienced an increasingly noisy ride and vibration at high speeds. i got to the point where i was concerned about the safety of the tires and took the vehicle in for service. they inspected the vehicle and recommended immediate replacement of the tires as there were severe cracks forming on both the inner and outer sidewall that went all the way through to the interior of the tire. clearly a tire not safe to be on the road. i feel that these tires were defective from the purchase date and the defects got worse over this 2.5 year period to the point of the aforementioned severe sidewall cracking.