Taking your #bike with you on a #DeutscheBahn long-distance #train usually requires early planning and ticket acquisition well (i.e. several months) in advance. So #renting a #bicycle at your destination comes in as your next option, preferably from a #local #bikeshop. Here is the #organictraveller's update on independent #bikerental in #Bremen: https://www.organictraveller.de/organictraveller-bremen#bike-rental_bremen