Do they make snow tires for bicycles?

the tires on my mountain bike would make pretty good snow tires. Ice might
be
a problem though.

I wonder if you can get spiked tires for bicycles, like the ones they used
in (that insane "sport") motorcycle racing on frozen lakes.

Although, to be honest, I haven't seen one of those races in many years. I
wonder if they finally outlawed them?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"