Arguably the easiest way to rent a bike in Poznań, the city's network of public bike stations and freestanding bikes is fairly dense and extends far outside the city centre, even as far as the airport (or close to it, anyway). To have a go at cycling around Poz, you need to first register online (on their website or the Poznański Rower Miejski mobile app), pay an initial fee of 20zł, and then you're free to rent a bike of your choice. Bikes come in two base varieties: 3G, which must be returned to bike stations, and 4G, which can be left anywhere within the city limits (but make sure to lock up the front wheel and select the correct option on the on-board computer). Locations and availability are conveniently shown on the PRM map, which also reveals a limited number of e-bikes and bikes with baby seats.