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Registered
Join Date: Mar 2001
Location: Falls church Va
Posts: 725
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It has nothing to do with the HAZ. I have seen this same fail mode in unmodified 6X15 fuchs that were tracked. The cracks were bad in one wheel and just starting in another from the set. They were starting in the web between the lug holes almost as if the hub was pulling the center apart outward. Heat in the hub perhaps? Many aluminum alloys are sensitive to heat in the range seen in brakes and to some extent the hub the rotors are bolted to..
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