whats a good tire size for rainy weather? no mud or rail road tracks(not on my commute). and what kind of tread pattern is good? i was thinking 28 or 32c semi slicks and trying to keep it under 300grams. i know frame/brake calipers determines how big i can go. but should i look for a slick center part and a gripy or a knooby outter tread for cornering?