Wheel base. The figure inclosed by lines through the points contact of the wheels of a vehicle, etc., with the surface or rails on which they run; more esp., the length of this figure between the points of contact of the two extreme wheels on either side.

Wheel base. The figure inclosed by lines through the points contact of the wheels of a vehicle, etc., with the surface or rails on which they run; more esp., the length of this figure between the points of contact of the two extreme wheels on either side.

• the horizontal distance between the front and rear axles of a road or rail vehicle