The Costway 16-Inch Kids Bike is designed for children aged 4-7, featuring a robust high carbon steel frame and a safe dual brake system, including a hand brake and rear coaster brake. This versatile bike can be used with or without training wheels, which are removable and designed for stability. The adjustable seat ranges from 22.5 to 25 inches, allowing for a comfortable fit as your child grows, while the quick release lever makes height adjustments easy. With 95% of the bike pre-assembled and tools included for quick assembly, parents can enjoy a hassle-free setup. The anti-slip, shock-absorbing rubber tires ensure a smooth ride, and the front and rear reflectors enhance safety. Additional features include non-slip pedals, an ergonomic seat, and a fun bell, making this bike the perfect choice for young riders.