Innovative vario seat allows for children of various sizes and ages to ride comfortably. Comfort back support for riders. Yellow powder-coated frame resists rust and scratches. Beats the competition with lifetime service and replacement parts. Grooved vario seat handle for easier carrying by adults. No protruding hardware for a safer ride. Durable welded steel frame. Sturdy, solid rubber tires on spoke-less wheels. One-piece welded crank. Heavy-duty rubber handgrips. Recessed no-pinch hub design. Long-lasting self-lubricating nylon bearings. Ships fully assembled (maxi requires one-bolt assembly). 5-year warranty.