Schwinn GTX 2.0 700c Men's Dual 18 Sport Bike, 18-Inch/Medium, Red Schwinn aluminum dual sport frame with Schwinn suspension fork offers versatile riding Shimano 21 speed trigger shifters with Shimano rear derailleur for precise gear shifting Front and rear disc brake for extra stopping power Schwinn alloy crank offers optional graring Alloy wheels with Schwinn multi use tires for use on or off road