Can anyone fill me in on the importance of shoe wear patterns? I noticed that the wear on my Bare Access 2s is all in the middle of the shoe, towards the forefoot. The wear on my NB MR00s is on the outside of the sole, very close to the edge. The wear on my Mirages is towards the outside of the sole, but not as close to the edge. What should an ideal wear pattern look like, or is there no ideal pattern?