The user cleans his wheelchair tires (video)
Two brushes are mounted on the aluminum structure at a distance equal to the distance between the wheels; a roller rotates in front of and behind the brush. Two small aluminum ramps for each wheel lead up to the structure. The user drives up onto the stand so that the front wheels stop above the brush. The rotatable rollers allow the wheels to spin in place while the brushes clean the tires; see the video here.
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