FAHR.RAD is one of several bike rental places in Eberswalde and was recommended by my hotel. They…read morecharge a nominal 8€ per day for bike rentals (according to their website). I paid 10€ per day for two days, but this included both a delivery and pickup from my hotel.
My hotel called them around 4pm to order a bike and it arrived shortly after 6pm. The bike included a headlight and tail light (both powered by a generator), as well as a bike lock. The bike was in good condition and appeared to have been well maintained. I left the bike with the hotel at checkout and went about my way.
The delivery person spoke decent English. I will use them again if I'm in the area.