See also:

Tire tread
Summer tires Do not drive with a tire tread depth of less than 0.12 in/3 mm. There is an increased danger of hydroplaning if the tread depth is less than 0.12 in/3 mm. Winter tires Do not driv ...

Tire inflation pressures X5 xDrive50i with two rows of seats
...

The Appendage Factor
M cars have had what I call a high appendage factor — the feeling that the car is an extension of the driver. It's typically experienced in cars whose various systems and characteristics are well- ...