There's a terrific article on rolling resistance and aero here:
Tire Rolling Resistance | Roues Artisanales
In general terms, the total drag of a cyclist will consist of 80% tire rolling resistance and 20% wind resistance at 10 km/h or 6 mph. At 40 km/h or 25 mph the numbers will reverse, with total drag consisting of 80% wind resistance and 20% tire rolling resistance.
As a general rule, most riders who try to get higher performance at commute speeds put exactly the wrong tyres on their bikes, almost everyone worries about weight too much, and some people believe quite insane things about wheels. (These beliefs have been stoked by years of marketing and pressure on cycling magazines to write absurd things, the aim being of course to extract money from people.)