This paper presents the study design and first experiences of a Pedelec Naturalistic Cycling study. There are 90 participants: 30 bicylists, 50 Pedelec cyclists and 10 E-bike cyclists. The bi-cycles are equipped with a data acquisition system that records among others speed data and videos on the traffic situation over a period of four weeks. Questionnaires assessing current travel and traffic behaviour and changes thereof, motives and experiences with Pedelecs / E-Bikes are used when recruiting participants, before and after the observation period. A one-week time use travel diary was used to collect qualitative information on the cycle trips and re-lated activities. Despite a low modal share of bicycling in the study area there were no prob-lems recruiting participants. Recruiting E-bike user proved to be a challenge as their market share in Germany is quite low. Participants are very cooperative even though the study proce-dure puts quite considerable demand on them. The data acquisition system provides reliable trip and video data, even though there are problems with the GPS data. Thus we expect an ex-ceptional dataset that will improve our understanding of travel and traffic behaviour of E-Bike users.