For the Number of Front Axles and Number of Rear Axles, the first unit must have at least a front axle and the last unit must have at least a rear axle.
Drawbar trailers: If you specify front axles on the trailer of a steered vehicle the wizard assumes you want a drawbar.
Self-steered/retracted axles: Click the Advanced button to use the Advanced Editor and select the Self-Steered and/or Retracted box for the relevant axles.
Steering linkages: Click the Advanced button to use the Advanced Editor and tick the Linkage box.
Wheels on each axle: Enter the total number of wheels on each axle, so if there is only one wheel on each side you should enter 2 in this field. Wheels are generally assumed to be at the ends of the axles except for aircraft main undercarriage wheels which are at specified spacing.
Evenly spaced or specified-spacing wheels: Click the Advanced button to use the Advanced Editor and select Evenly Spaced or At Specified Spacing from the wheel position drop down box on each axle.
For Front track width, all axles are assumed to be identical. Track width must be non-zero.
Non-identical track widths: Click the Advanced button to use the Advanced Editor and set the Outer Face Wheel Track on each axle.
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