Originally Posted by operator

This is false, your bike never travels fast enough for hydroplaning to become an issue. The "treads" on a road tire are decorative issue only. A slick tire will provide the most grip in both wet and dry conditions on paved surfaces. Automotive dogma does not apply here.

It's a wonder why tire manufacturers feel the need to put any treads on tires at all. I guess its for the general public who think the exact thing as above ^. I would love to see all slick road tires become more prevalent then decoration tires.

http://www.sheldonbrown.com/tires.html#hydroplaning
http://yarchive.net/bike/tire_directional_tread.html