The act of propelling a wheelchair is related to manual wheelchairs that can be self-propelled by the user, or they can be pushed by a companion or caregiver. To self-propel, the user must place their hands against the wheelchair hand rims.
This will be the component used on both sides of the chair to be able to push or pull the chair as the user sees fit. You can propel yourself going forward or backward to be able to avoid obstacles and uneven ground.