Since we've had our motorcycle trailers John and I have been looking for something to dress up the bland wheels. We've tried a few inserts for golf cart wheels without success.
Recently John discovered these wheel covers in Lowes (P/N 379412, $32.99). They are plastic chrome and have a nice mag wheel look. They have removeable inserts that allow you to change the background color.
They are not plug and play, however. They won't fit over the Harbor Freight trailer hubs without modification. Enter the 2 5/8" holesaw.
15 seconds later the covers are modified.
The finished product. They fit very snuggly so hopefully they'll stay on. We'll find out in a couple weeks when we head to Georgia.
Update: I've put several thousand miles on them with no issues.