I like the angle on the old tire trick 5 points just for that! good focus and lighting take a dull surface and gives it depth 2 points more. nothing to distract the eye in the background and a lone stone to give it life 2 more...total 9!
an old tire i'm guessing, I get that it's technically round but i don't see the roundness. the photo isn't really that nice to look at, it's very plain. i think this all could have been fixed by a slight change in a perspective and composition.
It is interesting the way the centre groove leads you into the scene. Mabee a higher angle would have shown more of the grooves, and more charactor. I'm finding the blurred forground a bit distracting as well. I like the concept.