Product details 700c wheels fit riders 64 to 74 inches tall. Schwinn aluminum fitness frame with rigid road fork offers quick, agile riding. 21-speed trigger shifters provide quick, smooth gear changes. Front and rear mechanical disc brakes deliver crisp all-condition stopping. Light and strong alloy rims provide added durability for everyday riding. Schwinn sport tires supply fast yet comfortable riding. Schwinn triple-density ergonomic grips and fitness saddle offer added comfort where you need it most. Tool-free adjustable seat post makes it easy to find a comfortable fit. Includes limited lifetime warranty for as long as you own the bike.SpecificationsBrand:SchwinnBicycle Type:Hybrid BikesBicycle Wheel Diameter:28\”Age Group:AdultNumber of Speeds:21 SpeedColor:RedFrame Material:AluminumAssembled Product Dimensions (L x W x H):70.00 x 25.50 x 43.00 Inches