32-34 all round should be well in summer and winter... if you drive a lot on slippery roads in winter, deflate to 30... you want a better fuel consumption, inflate the rear to 36 (39 if you load the car)... that's how i manage my tires...

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BMW X5 3.0si 2008
Premium Package
Light Package
Navigation
Reverse Camera
Rear Sensor (retro-fit)
Comfort Access
Spare Wheel
Power folding mirrors
Voice Control w Bluetooth
Power trunklid

BMW X3 3.0i 2006
M Aerokit
M Sport Package
Navigation System
BT Handsfree
Xenon HID

BMW X5 3.0i 2001 --- SOLD