With an Aluminum frame, 7 speeds and patented four-link front suspension system, the Allen Central delivers an incredibly versatile folding bicycle that is equally suited for long weekend rides or daily commutes through the city. The Central incorporates a 6061 aluminum frame, Tektro brakes, high performance 451 MM wheels, a patented adjustable folding stem and a 7 speed Shimano rear derailleur to provide a smooth, responsive ride in a bicycle that weighs approximately 25 LB. The Central uses a patented press-linkage folding design on the frame and headset which makes folding and storing this bicycle quick and easy. A patented rear wheel lock system allow the bicycle to be rolled like a cart when in a folded position for easy transport. With the exception of our Downtown model, all Allen folding bicycles use 451 MM wheels, which are slightly larger than standard 20″ wheels and deliver an exceptionally comfortable ride. Rider size range: 4’8″ to 6’5″/Max rider weight: 230 LB. Bike ships 100% assembled – unfold and go.