I have been advised by WA Transport Dept that in WA the new national code VSB14 applies and it is legal to go to up to a tyre 50mm diameter oversize from stock if fitted to a 4X4 and you do not have a lift kit. This will allow up to a 25mm lift using tyres only. Total overall lift allowed including tyres is 50MM. These are for modifications that do not require approval. I am happy withthis as I am looking at fitting 265/70R17 Cooper St Maxx on my stock 2010 STX but just wondering if anyone here in WA has been told anything different by the local authorities.