I can do my 11 mile ride in about 50 minutes or so. Half of the ride is on a bike path with no cross traffic and only sparse foot or bike traffic so I can book that section pretty fast so I am sure that takes some time off. Certainly leave yourself some extra time so you can take it easy the first few times. I am guessing before long you'll be doing the ride in 90 min. or so. But as had been stated several times. Take it easy at first. Otherwise you will burn yourself out and give up.