Understand the parts of the stroller If you want to fold the stroller easily, you first need to understand the various parts of the stroller. The key parts of the stroller are mainly wheels, chassis, seats, brackets, handles, etc. Before folding a stroller, understand how these parts interact. The wheels are the core part of the stroller, they are responsible for the weight and movement. The chassis is the structural part that supports and secures the wheels. The seat is the part that the child sits on, and the bracket is the key part that fixes the seat to the chassis. The handle is the part that controls the movement of the cart, usually