Graeme does it really go 30mm lower than this? Mine is a 2010 but does seem to do strange things like lower itself just before we lock it..https://www.aulro.com/afvb/images/im...016/08/555.jpg
30mm lower would be about 2 inches from bottoming out completely... Ground to spare...
The 285s are virtually a 1inch lift yeh? So with standard size tyres and another 30mm I'd probably be creating sparks as i bottomed out down the road..

