I recently put a new set of wheels and tires on my Land Rover Discovery. Nice aftermarket 18" wheels and Pirelli Scorpion AT tires in 235/60/18. I was interested to discover that these tires are factory fitted on some Touregs and Cayennes. If you have these tires, please tell me what air pressure VW or Porsche recommend. Also please tell me what air pressure you are running. I know my Disco is heavier than the other two, but it seems I have to run too much air pressure in these tires; more than I've ever run on an SUV before. I have settled on 40psi front and 44psi rear. The tread seems to be flat, but maybe wearing more in the center, meaning too much air. If you own one of these vehicles with this tire, please step in and comment on this tire in general and air pressure speciffically. Thank You.