private void applyInfo() {
        if (wheelInfo == null) {
            return;
        }
        wheelInfo.suspensionStiffness = suspensionStiffness;
        wheelInfo.wheelsDampingRelaxation = wheelsDampingRelaxation;
        wheelInfo.wheelsDampingCompression = wheelsDampingCompression;
        wheelInfo.frictionSlip = frictionSlip;
        wheelInfo.rollInfluence = rollInfluence;
        wheelInfo.maxSuspensionTravelCm = maxSuspensionTravelCm;
        wheelInfo.maxSuspensionForce = maxSuspensionForce;
        wheelInfo.wheelsRadius = radius;
        wheelInfo.bIsFrontWheel = frontWheel;
        wheelInfo.suspensionRestLength1 = restLength;
    }
The maximum suspension force, raise this above the default 6000 if your suspension cannot
handle the weight of your vehicle.

@param maxSuspensionForce the desired maximum force per wheel
(default=6000)
jme3-jbullet/src/main/java/com/jme3/bullet/objects/VehicleWheel.java