I bought these Mickey Thompson Sportsman tires online about 4 months ago and had them installed locally. I haven't put many miles (maybe 200) on them since then and there seems to be cracking all the way around the sidewall. Could this be from sitting and weathering during that time? Anything to worry about here? Driver side is in pics and pass. Side is just starting to crack in the same spot. Maybe 1mm deep at most and sidewall has decent thickness there.