The Whirlwind Mountain bike from Genesis Bicycles features a custom lightweight aluminum frame, a suspension fork to smooth out rough roads and trails, a 21-speed drivetrain with easy-action twist shifters and a Shimano rear derailleur for big hills as well as long flats. Alloy wheels with knobby tires for great grip on the trails. Front disc and rear linear pull handbrakes keep your speed under control, while the overstuffed springer style saddle and rise handlebars give the rider a comfortable and upright riding position. Whether you're on an off-road adventure or running errands in town, the Whirlwind has all your bases covered. Ideal for tween/adult females