Quote:
Originally Posted by icdumbpeeps305
The thing you would have to ensure is that the wheel can offer no resistance when pushed sideways (which is pretty hard). Even a caster design would offer some form of resistance until its direction was changed.
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Actually, a caster was what I had in mind. I believe that any resistance from the caster will be at least an order of magnitude less than wheel friction, so in engineering terms is "negligible", therefore can be ignored.