Advice from a Pro. Good Info.

[Portis]

Here (http://www.arcticultra.de/en.php?Gear) is some info from guys that race hundreds of miles in below 0 F temps. Good stuff.

[Machka]

Here's a few other sites with info from people who ride in the winter:

A couple of 'ultra' winter event sites
http://www.alaskaultrasport.com/
http://www.susitna100.com/

And the icebike site:
http://www.icebike.org/