I got the wheel home tonight and using 2 drums I have in the garage here are some pics.
Here is the wheel:
[IMG]
http://i107.photobucket.com/albums/m290/fclaridge/195Wheel1.jpg[/IMG]
The wheel is installed over the front hub and drum brake. Looks like there is plenty of room here:
[IMG]
http://i107.photobucket.com/albums/m290/fclaridge/195Wheel4.jpg[/IMG]
[IMG]
http://i107.photobucket.com/albums/m290/fclaridge/195Wheel5.jpg[/IMG]
Here are front and rear angles of the rear drum with the wheel:
[IMG]
http://i107.photobucket.com/albums/m290/fclaridge/195Wheel3.jpg[/IMG]
[IMG]
http://i107.photobucket.com/albums/m290/fclaridge/195Wheel7.jpg[/IMG]
So I think I am going to call this a success and be on the lookout for some of these wheels and try them out with tires on the bus. I'll keep the test wheel for a few days so when I can get outside when it's not raining and slip it on to see what the size ratio is for the bus I can see if it is what I truly want.