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Old 10th April 2007, 15:11   #1
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Default Tread depth and Stopping distance

Any formula/thumb rules to calculate the stopping distance of a car in relation to its tread depth for the following conditions:

(a) wet roads
(b) dry roads
(c) car weight ?

To simplify, lets also assume the braking system is standard front discs, rear drums and passive braking (no ABS, EBD etc.). And the speed of the car is 100 kmph.

I did find a graphic towards the same, from Tyres stopping distances - as tread depth reduces so required stopping distances increases:

Any affirmations/otherwise of the graph will also help, although a car's weight is not accounted for in that graph.
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