Yedoo Kids - Aluminum Rimmed Balance Bike - UK Designed Specialized Training Balance Bike - Fifty Model Balance bike made with a High Tensile Steel frame and fork Aluminum rims hold 12" inflated tires with scraeder valves - Great balance bike for toddlers! Handlebars are chrome plated steel with molded rubber handgrips Wheel hubs use lubricated cup and cone bearing sets. Safety/convenience: Rubber Tires with angled inflation valve stems