Post by Kai on Aug 6, 2007 12:53:10 GMT -7
Keeping Polish people alive on wet highways .... and other people as well. Here is an interesting demonstration of how tire (tyre) tread depth automobile stopping power on wet roads.
www.tirerack.com/tires/tests/includes/min_tread_vid.jsp
For people with metric measures, number equivalents are:
tread depth
12/32" = 9.5 mm
4/32 = 3.2 mm
2/32 = 1.6mm
speed
44mph = 71 kmh
47 mph = 76 kmh
length - stopping distances
automobile
195.2' = 59.5 m
290' = 88.4 m
378.8' = 115.5 m
pick up truck
255' 77.8 m
377.8' = 115.2 m
499.5 = 152.2 m
Water depth is given as 5/100" to 6/100"
' = feet
" = inches
www.tirerack.com/tires/tests/includes/min_tread_vid.jsp
For people with metric measures, number equivalents are:
tread depth
12/32" = 9.5 mm
4/32 = 3.2 mm
2/32 = 1.6mm
speed
44mph = 71 kmh
47 mph = 76 kmh
length - stopping distances
automobile
195.2' = 59.5 m
290' = 88.4 m
378.8' = 115.5 m
pick up truck
255' 77.8 m
377.8' = 115.2 m
499.5 = 152.2 m
Water depth is given as 5/100" to 6/100"
' = feet
" = inches