Yea your right but here it don't melt till spring. and most of us have gravel not cement driveways and no sidewalks in my town.
Wheels instead of skid feet work great here but is a home made thing.
That sure is something to think about Fred. They would never wear down or would take a long long time. Just might look into that. Should work really well on a paved driveway. Supper time guys so have a great evening.