I have a '05 3.0 Sport with 18 inch OEM wheels and tires. The ride seems to be a bit "bouncy", particularly compared to my previously owned Land Rover LR3. If I go up to 20 inch wheels and tires will that help or make the ride rougher? I know this is an elementary question for this gorup but I do apprecaite the input - got to do something to help the ride. Thanks