Originally Posted by some dude
On a slight side note: how do trucks put chains on while rolling? I was on a bus in Co. And it put chains on as we were rolling down the road (slowly).
If those "chains" are anything like what the school busses around here use it's an octopus like head that moves down and puts the arms into the interface between the tyre and the snow/ice. The "chains" never are on the tyre/wheel in the conventional sense. They seem to work well on an on demand basis for busses. Not piratical for a passenger car retrofit.