Function VehicleWheel.suspensionStiffness
This value defines the stiffness of the suspension. Use a value lower than 50 for an off-road car, a value between 50 and 100 for a race car and try something around 200 for something like a Formula 1 car.
double suspensionStiffness() nothrow @property @nogc;
void suspensionStiffness
(
double v
) nothrow @property @nogc;