hmm.. not sure but that sure dont look too normal. Whens the manufacture date on your tires? Look next to the DOT thing and itll have some numbers i believe its like week# and year so like 1407 would be 14th week of 2007, I believe..
nope no cracking for me.. my buddy back home has mud graps on his 7.3 I'll be home friday after class to use his lift to put my new pinion seal in so I'll take a peak at his as long as he didnt sell them yet..
he had a little cracking, not as bad as yours but id say yours looks normal considering his are new-ish too and his were like the size of the smaller ones in your pic. I wouldns stress over it
