A child seat needs to be chosen for the bicycle that will carry it. Rear seats may attach to the frame’s seat tube or to a compatible rack; front seats need their own suitable mounting area. Cycling UK notes that frame size and design can limit the options, so check the requirements of both the seat and bicycle manufacturers before buying.
Next, look closely at the safety details. The shoulder harness and foot straps should adjust to fit the child, and the mount should give a clear indication that it is locked. A rack-mounted seat requires a rack approved for that particular seat and load. The child’s feet must also be kept away from the wheel spokes.
A child seat changes how a bicycle balances, especially when its passenger sits high and behind the rear axle. Before setting off, confirm that the seat is fully secured and the straps fit, then get used to the handling in a quiet place. The most useful choice is not simply front versus rear: it is a complete setup that fits the bicycle and the passenger.