NITTO TERRA GRAPPLER G2 TIRES Complaints

275/60/20 tire size. Driving home the other night started noticing my truck felt wobbly. Thought it was just the road until the truck started violently shaking at around 60mph. VIOLENTLY shaking. Pulled off immediately and looked at the front, sides, rear end, etc. Checked the tires, rear passenger side was stolen in 1 spot, and around that spot in a very isolated area the tire was completely bald and had a large lump in it. Other 3 tires seem ok right now. Contacted manufacturer who directed me to fill out a form on their website to "try for a replacement.". Can't find receipts from purchase so that's no good. Took to local mechanic/tire shop who stated that the "tread separated from the tire.". Separation is approximately 1 foot long and 2/3 of the tire width. Bald spot runs along this lump/separation.

My tires have only 5600 miles on them...Nitto 265/65R17's. I have my 5,000 mile service. They rotated the tires. A couple of days later I noticed my steering wheel shaking. I took it back to the dealership. They said my tires have High Road Force..only the two that were from the rear. They contacted Nitto, they will not replace the tires because they only cover the first 1/32 of the tires and Im at 2/32. There has to be something wrong with these tires to be so new and yet have this problem. My tires cannot be rotated because the two with the problem will need to stay on the back of the truck so as that my steering wheel wont shake.