Just this week rode in 5° F weather, my new low record. Learned a bit more about underestimating needed gear, though if I had been doing more than the 2 miles each way I normally do it probably wouldn't have been an issue. Today though, my rear tire hopped off the rim and got wedged in between it and the brake pad. Had to let air out of the tube to get it back on and couldn't ride it at that low a pressure for fear of damaging the tire. When on my way back, it decided it wouldn't stay on no matter what I did and I had to carry the darn thing 3/4 of the way. Thank goodness for aluminum frames.