I'm not going to argue Carl. Many tires wear left of center. It is not defective tires (though some are better than others). It is geography, roads ridden, riding style, and maybe chronic under inflation.
The crown in my subdivision street does not look significant, but last fall you could have canoed down the side (torrential rain), and walked down the center. I once stopped on Skyline Drive in the middle of my lane, cause there was a black bear sitting just off the edge up ahead. I put my right foot down only, and almost went over (I'm a short 5'9", but the crown was tall). But I'm not arguing.

Chet Waters of
Rattlebars in his (good) tire article wrote....
ROAD CROWN HAS NOTHING TO DO WITH LEFT SIDE TIRE WEAR!Here is another opinion from a BMW forum:
Attempting to ride straight down a crowned road with a perfectly balanced bike in zero wind conditions would still cause that motorcycle to tend to steer to the right, toward the downhill edge of the road. The rider corrects for this by holding slight uphill steering to the left. This causes the front tire to wear more, left of center. Interestingly, for many models of motorcycles this phenomenon is reversed in England, Japan, and other countries where motorists use the left side of the roadway. Of course, they also make longer, faster, sweeping turns to the right.