The information you’ll find here applies to regular sized bicycles. A useful alternative for some people is a folding bicycle which can be carried as hand luggage. Folding bicycles can normally be carried on any service, though if they are in a case or wrapped up they may be looked on more favourably. On some services you can take full-size cycles but only packed up or in cases. Again, it is worth checking with the service operator to see what size restrictions they have for packages.