Depends on the day and the bike I ride. If I ride the commuter which is heavier, but a bit faster I can go 10km in about 30 minutes counting all the traffic stops. Obviously the time goes up if I get unlucky and get all reds. I've had it down to 15 minutes but that was a lucky day when ALL the lights were green and there were no ^&*&^* buses to block the lane, stop, make me wait, block the lane. On my 15km bike trail commute days I can get there in 30-35 minutes if I can clear the bike shaped objects in the park quickly enough. Exercising I get around 25-28km/h averages. Commuting I get 23-25km/h averages.