Tread depth and Stopping distance

theMAG · 10th April 2007, 15:11

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.

10th April 2007, 15:11	#1
theMAG Distinguished - BHPian Join Date: May 2006 Location: Avon, CT Posts: 7,219 Thanked: 1,816 Times View My Garage	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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