5" Wheels

WOAH! 5 inch wheels???!!! It's like the compactness of a 4 inch wheel, and the largeness of a 6 inch wheel! Amazing!

I googled 5 inch wheels, and found some good results.

[Aren Siekmeier]

If you're looking for a more customized wheel to suit your needs, and you have any crude lathing or milling abilities, you could consider making your own out of stock aluminum. Then you can make the diameter whatever you want, as well as customize other features like lightening pattern and how it fastens to sprockets and/or shafts.

Obviously, you should CAD the thing first, keeping in mind the limitations of whatever shop tools you have. Then, the actual machining process would be an excellent exercise for any student. We really need to give our students more jobs like this; they somehow can't ever drill a hole in the right spot, let alone mill something to spec.

Sorry if that was too unrelated to your inquest about buying wheels, but its an option that, while usually not as practical, shouldn't be totally ignored.