Bikes are a great way to experience the city and get a feel for its layout. Berlin is relatively big; maybe not in number of inhabitants, but after a day on a bike you could be feeling the stretch of the city unless you were smart enough to stretch first. It’s pretty easy to whip through the inner neighborhoods, but there’s a lot more to see beyond the central sights.
You can follow this tour—brought to you by Henrik “Henne” Kürschner—through pretty much the whole of town, as well as some far out beautiful suburbs, still in Berlin. Bring your fixie, 10 speeds, rent a cruiser or whatever, just get on the road.