The Bicycoo Mg, our third-generation balance bike, is no toy. There are plenty of cheap plastic balance bikes on the market that hit low price points. Our Bicycoo Mg is a one-piece magnesium frame. Not only is magnesium lightweight, durable, and stronger than aluminum, but it also absorbs 16 times more shock and vibrations, making it the ideal metal that gives competitive sports that extra edge. Magnesium is also the most eco-friendly and sustainable metal known to man. The rims are magnesium, with rubber pneumatic tires. The deluxe stem (gooseneck) and handlebars are aluminum. The Bicycoo Mg’s overall weight is 6.7 pounds, making it very easy for a child to control from the walking start to riding. The lowest seat height is 12 inches off the ground; kids can start the walking process early. The quick-release seat clamp is a small, simple but vital part; its job is to firmly clamp down on said tube to hold the seat post in place. Our seat post clamp does not require any tools, and it is adjustable as your child grows.