in a child seat, mounted on a bike, raise the center of gravity of the bike. This changes how the bike handles and but doesn’t add significantly to instability. The bicycles frame geometric also play a roll in stability — longer chain stays are an element that helps. The heavier the child the greater the impact. But, the weight of an infant is negligible compared to the size and strength of most adults so usually the change in balance is not unacceptable. If you want to practice before you put you kid into the child seat, load a book back with the child’s weight in books and strap it into the seat and take it for a ride.
childs bike seat
