Bob Noel wrote:
Do people really bike on snow and ice?

I used to! :-) there was a mountain pass near how that I
would climb with my bicycle, carrying my cross-country skis so I
could start a nice ski trek from there -- being already warmed
up and ready to go. I never quite figured out though how to carry
the bike on my back when skiing, twould have allowed me
to connect to another road on the other side of the mountain
and push the thing a bit further. I did however find a way to
wrap the tires with some strings to get some more grip on snow
(another technique consisted in putting larger tires on top
of the regular ones); but then, that wasn't commuting, just
having fun.

--Sylvain