public float getSkidInfo() {
        return wheelInfo.skidInfo;
    }
returns how much the wheel skids on the ground (for skid sounds/smoke etc.)<br>
0.0 = wheels are sliding, 1.0 = wheels have traction.

@return the relative amount of traction (0&rarr;wheel is sliding,
1&rarr;wheel has full traction)
jme3-jbullet/src/main/java/com/jme3/bullet/objects/VehicleWheel.java