Tip Nº 01
Postel's bike rental at reception is sign-out-by-name with no deposit and no time limit, but it works on a first-come basis (4 bikes only). On weekends in summer (June-August) all four bikes are usually out by 11h — sign out at 09h-10h if you want to do the Eggenberg loop before the rafting day-trippers fill the riverbank. The bikes have built-in locks but no helmet provision; if you want a helmet, the Vltava.cz rental on the riverbank has them for €2 / day (separate to renting their bikes).
Tip Nº 02
The Eggenberg brewery tour timing: Mon-Sat 11h, 14h and 16h, 35 minutes, 80 CZK / €3,20 with one beer included in the small taproom afterwards. The 11h tour is the most touristy (combines with the standard rafting put-in time), the 14h tour is the quietest weekday option, the 16h tour overlaps with the post-rafting crowd refuelling on Eggenberg dark. Book on weekends in summer (May-August) at the gate the day before; walk-in is fine on weekdays. Bring exactly 80 CZK in cash for fastest entry — the gate accepts cards but the queue is faster with cash.
Tip Nº 03
Cesky Krumlov bike-from-Postel route to the Eggenberg brewery: out the door of Postel on Rybářská, left to Latrán bridge (200 m), cross the bridge, immediate right onto the Vltava cycle path (signposted), follow the river south for 3 km on the south bank, cross back to the east bank at the brewery footbridge, follow signs for Pivovar Český Krumlov (200 m up from the river). Total cycling time 18-22 minutes, all flat, well-paved. Return via Plešivec back-road for the photo angle of the castle from the south (add 10 minutes, more scenic).
Tip Nº 04
If Postel's bikes are all out and you're staying at Merlin or Travel Hostel, the cheapest fallback is the Vltava.cz rental on the Plešivec bridge approach: €10 / day for a city bike, €2 helmet, no deposit. Walk 5-7 minutes from either hostel to the riverbank, rent for half a day (they accept hourly rates of €4 / 2 hours if you ask, even though it's not posted — say you're going to the brewery and back). Skip the Ingetour rental 100 m further, their bikes are in worse shape and the price is the same.
Tip Nº 05
The Vltava cycle path beyond the Eggenberg brewery continues to Větřní (10 km from Cesky Krumlov), then up the Lipno reservoir cycle network (60-80 km from town) for multi-day cycle tours. If you've brought your own bike or rented for a full day, this is the proper Czech-cycling experience that the Postel-bike Eggenberg loop hints at. Day-trippers from Cesky Krumlov to Větřní and back: 4 hours total cycling, lunch at the small Větřní pub on the river square (€8 goulash, locals' rate). Bring the Plzeň salami and rye bread from Hruška for the picnic option.
