[Quicksilver]

It is pretty obvious that you can use different materials to make wheels so why not fiberglass composited with plastic for general putt-putt driving around. When designing composites you only are interested in the tensile strength from the fiber. The only strength characteristic of the matrix that is of interest is its ability to deal with a compression load.

So far so good... It is all doable.
I just want to know what happens to the matrix when it is subjected to brake heat when you really start to drive the car. "Sorry sir, the warranty doesn't cover melting on mountain roads."