I purchased a set of 4 nitto motivo's for my touareg tdi in sept 2013 at which time i had 60,000 miles on my vehicle. today, 6/17/14, @ 75, 000 miles with 15,000 miles on the motivo's, i noticed 2 defects in 2 of my tires. the left rear tire had a huge bulge on the sidewall...about 3" inches across and 2" high. the right front tire had this 2" x 2" cut/gash or something on the sidewall. i immediately went to discount tire where i bought them and they said these issues were probably the result of driving over potholes and that all 4 will need to be replaced since i have an all-wheel drive vehicle and that the best they can do is give me a tread wear based credit on a new set in the amount of around $320. i paid over $1000 for your tires, which were warranted for 60,000 and i only got 15,000 out of them. and to make matters worse, it appears that the quality of the sidewall is very poor causing the defects i mentioned. i contacted nitto numerous times and they advised that they do not cover "road hazards" which they say caused the defects in my 2 tires. they also advised that since my tires were only measured as having between 5/32 and 6/32 of tread wear, essentially 1/2 worn out, they only warranty their tires if they are between 1/32 and 2/32...ie, totally worn out, before they would issue a pro-rated credit. this is absurd!!! the warranty is for 60,000 miles...after just 15,000 miles, my tires are halfway worn out! i should get a credit for 75% of the cost of the tires. i would really appreciate your consideration in helping me to receive credit in the amount of 75% ($750) of the $1000 i paid for these tires, since i only have 15, 000 miles on them and the warranty is for 60,000. *tr