I just put a Trackmaster II on my 650L a few weeks ago. I have about 130 mi street and about 30 mi offroad on the tire so far. Rode it to work today, during the ride I noticed a funny feeling in the rear. I get to work to find the tire chunked to hell. This also happened to a D606 when I had about 1500 mi on it. What's the deal, my pressure was about 22 psi. The bike is uncorked. Is this a defect in the tire in which I can warranty? I know offroad miles can cut or damage knobs causing chunking but with a tire that has 160 miles on it??