Bonza Bike Tours (30 Harrington St., The Rocks, NSW 2000, Australia; phone +61 2 9247 8800, www.bonzabiketours.com) offers daily bike rentals plus four bicycle tours of Sydney.
Most popular is the 3½- to 4-hour “Sydney Classic Tour,” visiting Sydney Opera House, Royal Botanical Gardens, Chinatown, Sydney Harbour and more. At AU$89 (US$84) per person, including bike rental, it is available Monday, Wednesday, Friday and Saturday.
Renting a bike on your own costs AU$15 (near US$14) per hour; AU$35 for four hours, or AU$50 for 24 hours.