Trofeo, Michelin Pilot Sport Cup and Pirelli Corsa System all have minimal tread depth when new (5/32" or 6/32") so there are not large channels to allow the water to escape. Some hard laps and you're down to 2/32". They are actually not bad in the "moist", having predictable break-away qualities, but treacherous in "wet" (easy hydroplaning) and sure as hell suicidal around anything frozen :-)
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