Quote:
Originally Posted by j-c-c
The wrinkling seen IMO is a byproduct of the lag of the outermost tread surface "stuck" to the pavement lagging rotationally behind the wheel rim, angling the tire's carcasses reinforcement plies from no longer being perpendicular to the rim as the rim/wheel tries to accelerate its rotation, resisted by the car's mass, and that angling of the ply's without stretching allows the tread/contact surface now to become closer to the rim, effectively shortening the rolling radius of the tire. The inherent compression as tire gets a smaller rolling radius of the contact patch forces the sidewall to wrinkle.
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Yes I agree. What I don't agree with is that this somehow creates artificial downforce.