BikeCad have "Front Wheel Trail" and "Wheel Flop" as a standard frame measurements. As I interpret the BikeCad drawings, Front Wheel Trail is the perpendicular distance between the steering axis and where the wheel intersects the ground (sometimes referred to as mechanical trail) and Wheel Flop seems to be the vertical component of Front Wheel Trail. Both these measurements is of great use to me but I fail to find the horisontal component of Front Wheel Trail among the standard measurements. While it's easy to calculate it would be nice to be able to display it and have it updated according to changes in the drawing.

Sorry if I'm just missing the measurement somewhere.

brgds /Jesper Hansén, Sweden