On my 08 Fat Boy I am replacing the wheel sprocket after 17,000 miles. The wear is excessive in the grooves, and after a recent trip I find the 'crown' on the sprocket wearing also. The wear on the sprocket has been more on the outside, with a little less wear on the inside. After closer inspection of both sides of the belt I see the wear is showing relative to the sprocket wear. There still appears to be a lot of wear left in the belt, but it is wearing more on one side than the other. I have been aware of this during past tire changes (as I am going thru tires after 3,500 & 4,000 miles respectively in a short period of time) and have been anal about belt deflection and wheel alignment. I always use a straight edge to check wheel trueness after all adjustments. (lay the straight edge on the fork to barely touch the rim, spin the wheel and feel for light contact) Any separation from contact would be in the micro of a measurement, and over such a short distance in the rim that I attribute it to variances in the mold of the wheel! If I were to screw in one axle bolt farther to pull the belt over to the inside more, I expect I would have the wheel out of alignment, or am I missing something?? Thanks Thanks.