BMW 2006 X5 4.8is SAV Manuale Proprietario

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Wheel/tire condition
Tire tread 
The tread depth should not fall below 
0.12 in/3 mm although, for example, 
European regulations only require a 
minimum tread depth of 0.063 in/
1.6 mm.
At tread depths below 0.12 in/3 mm, 
there is an increased risk of high-speed 
hydroplaning, even when only small 
amounts of water are present on the 
road surface.
As winter tires display a noticeable 
loss in their ability to cope with cold-
weather driving conditions once the 
tread wears to below 0.16 in/4 mm, you 
should always have such tires replaced 
to ensure continued safety.
Wear indicators at the tread-groove 
base are distributed over the tire's cir-
cumference and are marked on the side 
of the tire with TWI – Tread Wear Indi-
cator. If the tire tread has worn down 
to the wear indicators, then the legally 
permissible tread depth limit of 
0.063 in/1.6 mm has been reached.
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