Close to 200K on 6 bikes in 19 years and on pretty much the same roads day after day. All tires except for 3 or 4 wore perfectly in the center. Even had one that wore on the right side instead of the left. They all got replaced before the tread was gone mostly due to those wear spots caused the tire to bounce a bit. And it if was road crown or turns would it not be even all the way around the tire and not just in spots?