The presented concept is a tricycle designed for the elderly or physically challenged people with an inclusive design approach. One of the most special features of this concept is its movement mechanism, which receives the force from the passenger as a simple up and down movement.After ideation with the aim of placing the user at the center, we advanced the design and 3D modeling stages using digital human digital modeling (DHM) tools.In this way, the dimensions of the final product are in good agreement with the anthropometry of the end user, and the posture of the user was checked from...