Designed with high quality aluminum frame to which the wheels are securely attached. Lightweight at 14.9 lbs, kids can carry it easily, developing a sense of control. This starter balance bike comes partially assembled for painless setup. The wheels are securely attached! Just slide the seat and handlebars in position and clamp it down with the included wrench. Maximum weight capacity: 149 lbs. Like new, only used a couple times and my daughter advanced to a 20" regular bike.