Some bicycle parts, particularly hub-based gearing systems, are complex. Self-service, assisted-service, and full-service bicycle maintenance and repair options exist.
Some cyclists choose self-service: they maintain their own bicycles, perhaps as part of their enjoyment of the hobby of cycling or simply for economic reasons.
There exist several hundred assisted-service bicycle co-ops worldwide. At a co-op, laypeople bring in bicycles needing repair or maintenance; volunteers teach them how to do the required steps.
Full service is available from bicycle mechanics at a local bike shop. In areas where it is available, some cyclists purchase roadside assistance from companies such as the Better World Club or the American Automobile Association.
