【Safety】Rugged steel frame and 2.5-inch wide skid tires provide more stability and safety for riding. The handbrake with the shortest stroke provides better braking efficiency, and the foot brake provides double safety for young riders who do not have enough strengthr..【Designed for children】This bike comes with detachable training wheels that make it easy for even beginners to balance. The height of the seat can be quickly adjusted according to the height of the child. Bottle cages can carry water or drinks to make every ride more fun..【Easy to ride】Costic's non-slip pedals and sturdy crank for an easier ride, stable gearing and comfortable seat keep your kids happy on the ride..【Easy to assemble】85% pre-assembled, very easy to assemble, please refer to the installation instructions and installation video before installation. Please be careful not to install the front fork upside down and distinguish the left and right pedals. After assembly, inflate the tire. 20 minutes to assemble..【Good after-sales service】The 12" bike is for kids of height (32"-42"), the 14" bike is for kids of height (35"-48"), and the 16" bike is for boys and girls (42"-54"). Costic bikes are CPSC compliant, if you have any questions please contact us and our experts will help you.