If you need a bike rental in Silicon Valley, UDC Tours is the place. They have beautiful carbon Scott bikes to rent. I sent them all of my numbers and the bike was set up perfectly. Wouldn't know I wasn't on my own bike (S Works Roubaix) at home (except for the gorgeous weather). The staff was very friendly, knowledgeable, and accommodating. I was leaving early Monday morning before they opened, so I left the bike with the concierge at the hotel and they picked it up later that day (for only $5).
TripAdvisor June 2013