HLaB
Marie Attoinette Fan
indeed without a place for the water to disperse won't you technically be aquaplaning!
I forget the exact figure but on a narrow tyre you have to be going something like 200mph before aquaplaning becomes an issue. Treads on road bike tyres are only there for fashion/ sellability (is that even a word ;-) ). Its a bit like some fruit may taste better than others but if it doesn't look right it won't sell.