RB 86 is the designation of several regional rail services in Germany:
, operated by DB Regio Nord between Göttingen and Einbeck Mitte , operated by DB Regio Nord between Lübeck and Lübeck-Travemünde Strand , operated by Go-Ahead Bayern between Dinkelscherben and Munich , operated by VIAS between Hanau and Groß-Umstadt-Wiebelsbach