Do I have to tell you in advance the duration of my bike and Rollerblade rentals? No. You are free to return our rental equipment at any time. 2 hours is our minimum charge. After the 2nd hour, we charge by each additional 15 minutes by proportional rate. But, for example, if you return in 7 hours, we'll automatically charge you the 8-hour rate because it is cheaper. Our customers always enjoy the benefit of paying the least expensive rates.