Mower tire hub cap

This is a mower hub cap specifically designed to fit a Black and Decker mower, but I suspect many mower tires are the same design and size, so hopefully it will fit more than just mine and someone will find this useful.

The standard hub cap falls off way too easily, and I've lost all but one, so I figured I'd make something while I had a basic model to work with.

This isn't exactly the same and fits pretty tight, and that is on purpose. I have to use a rubber mallet to knock it in.

Update 2018-10-26: I had a problem with the fins breaking off and so built a little more rugged one. Uploaded as V2.