Hybrid bike aluminum frame and alloy front suspension fork is great for a variety of terrain28-inch wheels fit riders 64 to 74 inches tall21-speed shifters provide smooth gear shiftsAlloy linear pull brakes deliver precise stopsAlloy double wall rims provide lightweight strengthSuspension seat post, Schwinn hybrid seat, and ergonomic handlebar grips offer superior comfortIncludes a limited lifetime warranty for as long as you own the bikeThe manufacturer may substitute components with components of equal or greater performance level.