Schwinn GTX1 Adult Hybrid bike (men or women), aluminum lightweight tubing, dual sport bicycle. Size: 700c wheels that fit to riders 5'2" to 5'9' tall. Color: green / grey. 21 speeds, and including extra speedometer, and Shimano Revoshift SL-RS35-R Twist Shifters (7 Speed) that enhances the rider's ability to change gear with ease. Good as new, only used a few times. Pick up in San Jose (preferably) or on main Stanford campus.