Quote Originally Posted by OakLeaf View Post
No, it's the two white dots on the front lip that appear when the "regular" part is worn down. You'd know that if you read the instructions.

Although I still haven't read enough of the instructions to find out what that oval cover in the center is for.
The center piece can be screwed into some shoes (like Sidis) that have another screw hole. It helps you remember the placement of the cleat. You just snap the new cleat onto the old center piece. Eventually, those can get worn down too. For those without a way to bolt that into the shoe, it's kind of a useless piece of rubber.