Probably a question that's a bit stupid but my td4 has got a factory fitted (I think) body kit on it which means that the wheel arches 'stick out' more - if I fitted bigger wheels this would 'fill the space' a bit more but I am not sure if there would be any downsides to having bigger wheels - apart from more expensive tyres? Someone told me that they would give better road holding and someone else told me it would be not as good as the 16's. Can anyone advise?