Last time I tried to ride at -15C, I made it a mile before I had an ice cream headache and bailed back for the house.
I was too proud to take the garage owner's offer for a ride back home.
At least it was sunny.
Kids were skating on a backyard rink on my return trip!
I've walked and jogged at those temps, wasn't so bad. The biking though.....
15F and no wind is about where I draw the line for riding. You crazy!
Won't deny that.
For more reasons than biking in cold weather though.