Wheel Offset (Inset/outset) -
This is the distance in mm between the centerline of the wheel rim, and the line through the fixing face. You can have inset, outset or neither. This determines how the suspension and self-centering steering behave. The most obvious problem that will occur if you get it wrong is that the steering will either become so heavy that you can't turn the car, or so light that you need to spend all your time keeping your vehicle in a straight line. Other problems that can occur, include tires hitting the body or suspension and high speed vibrations in the steering wheel.