The single speed Allen Downtown model incorporates a 6061 aluminum frame, 20″ wheels, a patented folding stem and delivers a smooth, responsive ride. As a single speed model, the Downtown is best suited for flat terrain or small hills. The Downtown 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. Rider size range: 4’8″ to 6’5″/Max rider weight: 230 LB. Bike ships 100% assembled – unfold and go.