Print the parts without support.
1/10th scale RC street racer to electric and really wanted to run it off-road...enter the 3D printer! Simply print the wheel out of rigid plastic (i.e. PLA, ABS, Nylon) and the tire out of flexible, press together and go.
Different wheels for RC vehicles, was designed to fit Daniels cool OpenRC Truggy http://www.thingiverse.com/thing:42198.