Part on Bricklink: 80441. 80441pb01 is the full value on Bricklink, the Lego instructions show 6400773.
Background:
I am using this in Bricklink Studio. The interesting thing is that I can find the wheelchair model in Bricklink Studio (part 80440), but I could not find the wheelchair while searching the LDraw Library. It was my understanding that LDraw was the source of the models used in BrickLink studio. This could be a case of my search skills failing me, but regardless of source it seems like a wheelchair model was made but not the wheels (yet).
Note that this wheelchair model is only a couple years old and very similar to the previous wheelchair. The new wheelchair is narrower at only 3 studs wide, which allows it to fit in more places.
Background:
I am using this in Bricklink Studio. The interesting thing is that I can find the wheelchair model in Bricklink Studio (part 80440), but I could not find the wheelchair while searching the LDraw Library. It was my understanding that LDraw was the source of the models used in BrickLink studio. This could be a case of my search skills failing me, but regardless of source it seems like a wheelchair model was made but not the wheels (yet).
Note that this wheelchair model is only a couple years old and very similar to the previous wheelchair. The new wheelchair is narrower at only 3 studs wide, which allows it to fit in more places.