For riding on streets or a dirt trail, the versatile Schwinn Men's GTX 2 700c 21-Speed Hyrbid Bike delivers smooth and comfortable riding. The Schwinn® multiuse tires and alloy high-profile double-wall rims offer stability and traction on several types of surfaces, while the front and rear disc brakes provide reliable stopping. The Shimano rear derailleur with trigger shifter facilitates easy gear switching between the 21 speeds.