This study presents a computer aid engineering analysis of an adaptive system designed to enable CrossFit wheelchair users to train with an AirBike. The design process was based on a user needs assessment, considering key aspects such as equipment accessibility, device ergonomics, exercise intensity, and necessary modifications to ensure a safe and inclusive experience. The evaluation established the user profile, identifying physical factors such as upper-body mobility and strength, as well as the scope required to meet users’ motivational needs. This analysis defined the key functional requirements for the system. To meet these requirements, the development process adhered to the quality function deployment methodology to prioritize technical specifications. A three-dimensional model was created in SolidWorks, integrating a rail and stop mechanism for wheelchair accessibility, along with adjustable handles. Stress analyses were conducted to assess system performance under an applied force of 1372 N, representing the expected loading conditions. The results showed that the maximum stress (230.6 MPa) remained within safe limits, as it did not exceed the material’s yield strength. Finally, a full-scale prototype was manufactured, ensuring compliance with safety, comfort, and efficiency criteria for adaptive CrossFit athletes.