A device for the simulation of a seated position in a wheelchair that includes at least one of the following adjustable components: • a seat backrest (i), whose horizontal position can be adjusted by a horizontal adjustment means, • the seat backrest, whose vertical position can be adjusted by a vertical adjustment means, • two armrests whose horizontal distance, which defines the seat width, can be adjusted by a means for the adjustment of the horizontal position of the armrests, • a foldable seat pan, whose reclination around the shaft of one modular frame can be adjusted by a means for the adjustment of seat reclination, • a footrest whose vertical position can be adjusted by a means for the vertical adjustment of the footrest; and at least one means for position measurement (61, 62, 64, 65, 66, 68) for determining at least one position of the at least one adjustable component (1, 2, 3, 6); the device further including two wheels, which have a shaft whose horizontal position can be adjusted by a means for the adjustment of the horizontal position of the wheels, characterized in that all the adjustable components are included; and wherein all the means for position measurement (61, 62, 64, 65, 66, 68) used for the determination of all the positions of all the adjustable components (1, 2, 3, 4, 6) are included, thereby allowing for the determination of the following dimensions which are used for the manufacture of a personalized wheelchair: • height of seat backrest • seat width • horizontal depth of seat • seat reclination • horizontal distance between the seat backrest and the wheel shaft • distance between the seat pan and the footrest. • a seat backrest (i), whose horizontal position can be adjusted by a horizontal adjustment means, • the seat backrest, whose vertical position can be adjusted by a vertical adjustment means, • two armrests whose horizontal distance, which defines the seat width, can be adjusted by a means for the adjustment of the horizontal position of the armrests, • a foldable seat pan, whose reclination around the shaft of one modular frame can be adjusted by a means for the adjustment of seat reclination, • a footrest whose vertical position can be adjusted by a means for the vertical adjustment of the footrest; and at least one means for position measurement (61, 62, 64, 65, 66, 68) for determining at least one position of the at least one adjustable component (1, 2, 3, 6); the device further including two wheels, which have a shaft whose horizontal position can be adjusted by a means for the adjustment of the horizontal position of the wheels, characterized in that all the adjustable components are included; and wherein all the means for position measurement (61, 62, 64, 65, 66, 68) used for the determination of all the positions of all the adjustable components (1, 2, 3, 4, 6) are included, thereby allowing for the determination of the following dimensions which are used for the manufacture of a personalized wheelchair: • height of seat backrest • seat width • horizontal depth of seat • seat reclination • horizontal distance between the seat backrest and the wheel shaft • distance between the seat pan and the footrest. • height of seat backrest • seat width • horizontal depth of seat • seat reclination • horizontal distance between the seat backrest and the wheel shaft • distance between the seat pan and the footrest.