Make realistic wheels from store-bought ones
Typical mass-produced wheels look okay on many toys, but if you want wheels that look more like the real thing, try this. First, drill out the center of a purchased wheel using a 7⁄8 " Forstner bit. Dye the resulting tire black. Then, cut a 1⁄2 " length of 7⁄8 " dowel and drill an axle hole in its center. Dye this wheel rim a contrasting color or leave it natural; then, glue it into the center of the black tire.
—Matt Wellington, Temple, Texas