Z&Uuml;M SX Metal Balance Bike Sealed bearings for maintenance free, silent and smooth running wheels All terrain, rubber, air inflated tires on steel hub and spoke wheels, make for a durable smooth ride High grade steel components including quill stem and double bearing head set Dimensions: 33.5 inches long, 23 inches tall, handlebar width - 16.5 inches, seat/frame width - 5.5 inches Adjustable Seat Height (Adjustable from 14.5 to 18 inches from the floor)