This tool can convert from a Pioneer cycling computer internal “*.DB” data file, to a GPX file suitable for upload to Strava.
Note: This tool can handle only activities that have location information; indoor trainer rides without location information can't be turned into a GPX file.
Note: you may be able to create a proper FIT file directly on your unit (a FIT file is superior to a GPX file, holding much more data and can represent an indoor-trainer activity as well). See this comment at DCRainmaker.
Data uploaded to this tool is used only for creating the GPX file returned to you, and is not logged or retained. If you encounter an error with a particular DB file, please mail it, along with a description of the problem, to Jeffrey.