If I want to travel with bicycle from Uster to Rapperswil using ZVV S-Bahn do I need to buy additional ticket for the bicycle?

Yes.

Unless it is a folding one folded, in which case it is 'hand luggage' and goes for free.
Half priceTicket* is necessary for a bike. If you do a long trip, check out the price compared to the bike day tickets which might come cheaper even for a single journey.
More info here.

* Edit: on looking at the site more carefully, it looks as if you need a full ticket for the bike if you don't have a half-price card (Swiss Pass). I've had the half-price thing for ever and a day so I didn't know!

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Longbyt

Thank you for quick reply. I don't find option to buy such a ticket on this site: https://www.sbb.ch/en/travelcards-an...e-tickets.html

On my screen the option to buy in on the right. I see it clearly.

Pay 99,90 chf for a bag, and your bike has a lifetime of free travelling.

(great solution, unless carrying the bag is to much of a burden)

Hmm.. Guess that is the method to get my mtb up Uetli without sweating for an hour, such a bag in a backpack is no burden when going downhill..

https://www.sbb-shop.ch/pub/index.ph...=106&l=fr&l=de

I see only:

• 1-day bike pass reduced fare
• 1-day bike pass full fare
• Storage reservation

However no: "Short-distance bike ticket reduced fare" (I have Halbtax card)

You just buy a normal half fare ticket.......not bike-specific

No - you buy the equivalent ticket to your passenger ticket.

So only half fare if you have a half-tax card or are a child, or the special case that you already have a travelcard (GA, zone).

https://www.sbb.ch/en/travelcards-an...e-tickets.html

No. Only up to Waldegg. Up to Uetliberg costs another CHF 100, even if in a bag.
https://szu.ch/service-information/velotransporte.html

Thanks, saves me the search. (and I can understand the rule, the train would be overcrowded with bikes)

Back to sweating it is..