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Other than water channeling, how could the tires be considered directional? They say the construction is such that they're meant to be rotating one way but lets see how the forces break down... When the car is accellerating forward, the rear tires' contact patch sees a force tangential to the road and in the direction of the car's accelleration. When the car is braking, the front tires' contact patch would also experience frictional force tangential to the road and also direction of the cars accelleration, which, under braking, is in the direction opposite of the car's motion (negative accelleration). Doesnt this suggest that any given tire is capable of handling forces in either the rotational or counter-rotational directions, since the manufactures don't specify the front or rear location for a tire? How, then, can there be a major difference (other than in water channeling) between running tires normally or backwards? Maybe I'm smoking too much crack...
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