About this item ? High-quality Frame : The frame of this bike is made of high-quality carbon steel, and the tube wall of the frame is thickened to increase its strength, so it has a stronger load-bearing capacity and is very stable. ? Thickened and Widened Tires : The thickened and wear-resistant rubber tires can easily cope with various road surfaces. And its widened design makes the tires’ landing area larger, steering more smoothly. The bicycle is designed with two auxiliary wheels to keep balance during a ride and effectively prevent rollover. ? Height Adjustable : The seat can be raised from 22inch to 26.3inch, no need to change the bike even if your child grows taller. ? Combined Front and Rear Brakes : This bike is equipped with a high-sensitivity dual brake system in front and behind. Its braking action is very reliable and it has a chain cover to prevent the chain from hurting the child’s feet. ? Streamlined Triangular Structure : This bike uses the classic streamlined triangle structure, bringing a stylish and sporty appearance. In addition, the triangular design is stable, solid and shock-resistant, which can prevent your kids from falling even when the training wheels get deformed.