Enjoy a smooth and comfortable ride with the GMC women"s Denali road bike. It has Vitesse V-Profile aluminum wheels with 700c high performance tires for comfortable riding. It offers 21 speeds for truly exciting performance. The bike has Shimano REVO gear shift system for better control on different terrains. Its Shimano TZ30 derailleur lets you effortlessly ride uphill. The 21-speed road bike has a sturdy steel and aluminum frame. Its caliper brakes offer smooth and easy stopping power. With 26" front wheels and 28" rear wheels, the GMC Denali 28" road bicycle lets you enjoy smooth rides on tough and hard terrains. It has a kickstand for easy parking.