Engineered based on an award-winning design, Ninebot Kids Bike is a dream ride with optimal geometry physique, superior safety checks, refined bearing system to be easier-to-learn and smoother-to-operate. Premium grade kid’s bike made for boys and girls with top of the line safety. The Ninebot 18 inch kids bike is easy to operate and comfortable to ride for children 5-10 years old with the height of 3'9'' – 4'9''. Easy to ride: Suspension on the front wheel maximizes riding stability. Refined design of bearing system remarkably reduces friction for effortless operation. Streamline and minimalist design with adult bicycle craftsmanship for top quality kids bike. Double Protection: The coaster brake works on rear wheel, the hand brake on the front. The fully-enclosed bicycle chain can effectively reduce friction and minimize the risk of chain breakage. Plus, it protects little ones from potential scratches. Safe & Comfortable Riding: Ergonomic and adjustable saddle allow the bike to grow with your child. Shock reduction tires for superior effortless riding experience. Optimized gear ratio with balanced resistance for kids’ to encourage muscle development. Design for Young Rider: Standardized steady stand and soft-silicone coverage on bike stem, top tube, head tube, hub prevents exposure from all sharp edges offering extra safety for kids. Easy to assemble, please refer to the manual for details..