Bicycles of the following categories are considered hand baggage and do not require a booking: 

• Folding bicycles, when folded up.
• Bike trailers.
• Bicycles of children younger than 6.
• Shopping carts (including those with a bicycle connection).
• (Electric) scooters, provided the largest wheel has a diameter of no more than 30cm or less than 12 inches.
• Bicycles packed in a transport bag with their front wheels detached.

For bicycles which have had their front wheels detached, use a special transport bag such as the TranZBag, which is available in the SBB Shop or from specialist bike or outdoor shops. Any cover is accepted regardless of the manufacturer provided that the front wheel that has been detached is placed in the carry bag and the cover is easily portable.

However, a prerequisite for travelling with a bicycle in SBB is that you can load it and unload it independently and place it in the holder provided. 

• Only SBB trains of the categories RE, S, and R are permitted to carry tandems, recumbent bicycles, tricycles, freight bicycles, and other bicycles longer than 2 meters. 
• Vehicles with combustion engines (such like mopeds), three-person tandems, multi-seater recumbent bicycles, personal transporters (such like Segways) and electric mopeds are excluded from being transported.
• On Zurich's S-Bahn trains, self-service loading of bicycles is only permitted from 8 a.m. to 4 p.m. and from 7 p.m. to 6 a.m., Monday through Friday. The itinerary indicates other links with bicycle transport restrictions with a crossed-out bicycle emblem.
• Due to the dimensions of train doors, and for safety reasons, only bike trailers no wider than 80cm can be carried on most trains.