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      12-14-2016, 05:08 AM   #4
3ster
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Drives: 1M Coupe, M135i, M140i, Z4M40i
Join Date: Oct 2013
Location: Cotswolds, UK

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As the wheel goes onto full lock it tilts (castor angle). This tilt cause the tyre to fold over the edge of the tread which causes a thump through the suspension and steering.

I too had the problem you are describing and took the car back to the dealer who gave me this explanation.

When I changed the fronts to winters and then onto Goodyear Assymetric 3's when I replaced the PSS's (92Y rating on the front) the knocking was no more.
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