I have a used Schwinn Sierra 7 Bicycle available for sale, as well as a service package with the Stanford Campus Bike Shop through June 2016. The service package entails free labor charges, such as fixing flat tires, installing brakes, or fixing any other issues with the bike with no labor cost. The bike has a couple issues in that it only works in the fifth gear unless the chain is manually shifted to another gear, and the front brake is more effective than the back brake. However, it looks and rides great and makes a great bike for commuting. Please email me with any questions or offers, thanks!