a very useful app for cyclists in both rio de janeiro city and state is bicicletando (cycling)  downloadable on this page - the utility provides guides, routes, and  even games for all bike aficionados - also available via itunes on this page.

this map shows close up of several neighborhoods in rio, and depicts existing and planned bicycle paths for each district. 

this very useful map shows a simplified layout of the main bicycle paths, with a list of landmarks at the base of the map - also by trasporte ativo, this map shows an overall view of bike paths across the entire city.

this interactive map by bike rio shows all the stations where public bicycles are available, with detailed addresses and availability status of the stations.