Czesc - Servus!

It is my first post here - nice to find this place

Could you help me, please? I am not sure what should I do if I want to take a bicycle on local train in Germany.

We are going to cycle Main-Radweg in May. And I need to buy ticket for us and our bicycles. Because we are going to use local trains ("Nur Nahverkehr" when searching) I can't buy bicycle ticket with bahn.de.

I have found also this page:

https://www.bahn.de/p/view/service/fahrrad/rad-nahverkehr.shtml

... but even with Google Translate it's not clear for me.

Summarizing - how can I buy online a ticket from Berlin to Bayreuth for us and our bicycles? :]

Thanks! :]

Szy.