1. Add this line to the default.dat file below MODELFILE MODELS\GENERIC\wheels.dff.
   MODELFILE MODELS\GENERIC\nowheel.DFF

2. Change this line in the default.ide
   # wheels: 250-257

   Change it to
   # wheels: 250-257, 249

3.  Add this file to the \models\Generic folder.
    nowheel.DFF

4.  Add this line below the line 256, wheel_smallcar, generic, 2, 20, 70, 0 in the default.ide
    249, wheel_lightmod, generic, 2, 20, 70, 0