3 wheel cars, especially lightweight ones, can have some problems when driven on snow covered roads since its wheel pattern doesn't fit the ruts left in the snow by 4 wheeled vehicles, especially after the snow has refrozen into hard icy snow and is wanting to push your wheels back into the pre-existing ruts. Traction could get interesting if the middle wheel is the driven wheel and is always having to cut a new rut in the snow.
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