Are you saying the rear tire is NOT centerlined with the front track???
I'm new so please pardon my ignorance of the M3W.
Dan,
Per the drawing shown in the link below, the rear wheel most certainly appears to be centered between the tracks of the front wheels.
Hope this answers your question.
https://www.dropbox.com/s/hll7o2qzf6bddf8/M3W%20dimensions.pdf