ccording to market research: longer life for wheelchairs in the future Target: enhancement of the rigidity and the longevity in conjunction with a high functionality (a lot of adjusting positions) in comparison with minimal weight constituent parts: aluminium tubes, 8 aluminium forgings, 5 aluminium bar moulding profiles, 12 plastic parts. This combination allows innovative solutions for every-day life and exceptional design. 1. all functional components are made of aluminium 2. bended element = steering axel axis and adjustment of front seat height; innovation: no angle adjustment required; made of a single aluminium component 4. innovative design of the end of the rear frame -> shapely retainer for axis tube & retainer for seating system made of a single aluminium component 5. innovative element for backrest adjustment and locking -> angle adjustment, locking and unlocking device made of a single aluminium component