It can be difficult to know if you can bring your bike on the train. The Lund Nature Conservation Association has made a detailed inventory of the transport possibilities for the 2020 cycling season. You can bring your bicycle on the regional trains in most counties. You can also take the bike on a commuter train, with some restrictions and only during a certain part of the day when there is low traffic.
Here you will find railway maps of northern and southern Sweden that show where you can take your bike on board and how dense the train traffic is on these routes.
Source: Lund Nature Conservation Association
Photo: Nora Bergslag's Veteran Railway