Yesterday, 05:46 PM
I'm by no means a tyre expert, but in the world of vehicle braking we use the formula F = µR.
Let me also explain that in the world of modern vehicle braking, stopping distance is all about tyre grip :0)
F is the friction force (that is to say, the attainable force which can be used for braking and/or steering), µ is the coefficient of friction (a constant to all intents and purposes, for a given tyre compound and given road surface), and R is the reaction force (which is simply the weight on the wheel or axle).
You will note contact area and tyre width are nowhere to be seen in that formula.
That's not to say that area of a tyre on the road - or of a brake shoe on a brake drum for that matter - cannot have an influence; but it is generally a negligible one.
Let me also explain that in the world of modern vehicle braking, stopping distance is all about tyre grip :0)
F is the friction force (that is to say, the attainable force which can be used for braking and/or steering), µ is the coefficient of friction (a constant to all intents and purposes, for a given tyre compound and given road surface), and R is the reaction force (which is simply the weight on the wheel or axle).
You will note contact area and tyre width are nowhere to be seen in that formula.
That's not to say that area of a tyre on the road - or of a brake shoe on a brake drum for that matter - cannot have an influence; but it is generally a negligible one.