Bike in Train

Hi!
We would like to go to Stockholm by train and take bikes with us . In Lulea station we could'nt find office information...
Obviously, it's possible to get in the train with BIKES but untill september 1st.
In different countries in Europe, when bike is not allowed in train, it is allowed to dismantle and bring it in the bike bag.
Do you know if it is possible to do that in swedish train?
What is the limit size bag to travel in train?

Thank you for your answer...
Fabien

It is no longer allowed...

Due to security reasons you are not allowed to bring your bike on the train. However, if the bike is foldable and you can carry it yourself as hand luggage, you may take it with you.

It is only allowed between june 14 and august 31 and only on certain trains. A special ticket is needed, costs from 149 SEK and you need to hand in your bike 30 minutes before departure.

On the train you are only allowed to bring as much luggage as you yourself can carry and your luggage may not intrude on other passengers' space. I doubt very much this includes a disassembled bike.

This information concerns train run by SJ. Check the links below for more information.

Links
SJ.se
SJ.se - Luggage and storage

are you sure it's only in certain periods?? The fare of course is more expensive but :::

If you click on the link you see that they have changed the information. It now says:

Due to security reasons you are not allowed to bring your bike on the train. However, if the bike is foldable and you can carry it yourself as hand luggage, you may take it with you.