Also known as Cool Tour Company, this outfit located just off the market square offers bike rental, bike tours and a range of thematic walking tours with entertaining and professional guides. With the exception of segway tours, no reservations are necessary - English language walking tours leave daily from St. Adalbert's (the tiny church on the market square) at 10:00 (Jewish Kraków tour) and 14:00 (Old Town tour; price for each 80/70zł). 4hr bike tours in English leave daily from their office at ul. Grodzka 2 (at 10:00 and 15:00 from May until end of September; at 12:00 from October until end of April; price 100/90zł); don't worry, it's not too strenuous and fans, water and ponchos are all provided depending on conditions. See their full offer and book tickets on their website.
Krakow Bike Tour
ul. Grodzka 2