The Fitnex FMI-Fitness Masters Inc - X5 Kids Spin Bike will help your kids get in shape, fight childhood obesity and create young athletes. FMI-Fitness Masters Inc. is the only manufacturer in the world offering this totally new and fun Kids Spin Exercise Bikes Perfect for both boys and girls. The Fitness X5 Kids Spin Exercise Bike is designed especially for the body sizes of children, teens, & Little People 40" to 63". The X5 will rapidly become a standard tool for family fitness and weight management. The X5's are built with high quality materials for smoothness and long life.