At last, a wheel base with adjustable width and depth that can accommodate installation of a custom technical aid. The solution is herea base to build on! The bases frame is 90% aluminum, making it extremely light for the caregiver to handle and easy for the user to propel. Characteristics The tilt angle, controlled by two hydraulic cylinders, adjusts smoothly with two levers. Setting it at a negative 5° angle makes standing transfers easier. A hydraulic cylinder allows for all desired readjustments. The seat-to-floor height can be modified by adjusting the interface anchoring mechanism on the frame as well as by front- and rear-wheel selection. The T-shaped armrests are removable, retractable, and height adjustable.