Quote:
Originally Posted by SvNewbie
What you know to be true is actually completely false. There is no relation between friction co-efficient and contact patch size. The friction force between an object and a plane is given by Force = co-efficient of friction * weight. The co-efficient is a static number which is the same for a given material, or compound of tyre in this case.
The reason you want to stop at the verge of a stoppie is because the centre of mass of the motorcycle and rider is considerably higher the centre of rotation of the tyres. Therefore some of the stopping force is going to act to pivot the motorcycle around the front axle.
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Just to be a complete geek about it since we'd best get this right or mr otter up there might demand I put my engineering L plates back on.
The coefficient of friction actually varies a bit depending on the force on the tyre, they're actually sliding a bit all the time.
And to the best of my knowledge the fulcrum point is the contact patch not the axle.