How cold is too cold?

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The lowest I've ridden in is 24 degrees Fahrenheit. My gloves and shoes covers weren't much help.

The lowest I've ridden in is 24 degrees Fahrenheit. My gloves and shoes covers weren't much help.
I've ridden in -5 degrees celsius, but find the cold air hirts my lungs so try to avoid it. I live in a much warmer place now so dont have the problem anymore

recent articles on the subject.

Link 1 (http://online.wsj.com/article/SB119586938632802777.html?mod=googlenews_wsj)

Link 2 (http://www.roadbikerider.com/warmfeet.htm)

I live in Spokane. I have ridden as cold as 20 F degrees. I have toe covers, tights, thick jersey, long sleeved T, and wind breaker. However, I can only handle about 10 miles in the cold. I typically ride every month of the year, but I don't ride when the roads are icy or have snow on them.

Supposedly there's a Nordic saying that goes: "There's no such thing as too cold, only not enough clothes." Or something like that. I've ridden straight through several Midwestern winters. 5° F seems to be about my limit for training. Wear lots of wool.
I once had a science teacher tell me “There is no such thing as cold just an absence of Heat” :confused:

Anyway, I rode yesterday with the temp about 30 deg F with strong winds and was not really cold at all, maybe because I was working so hard to get home against the wind:eek:

I commuted to work for years, year round, in the Washington DC area. The coldest it gets is like 5 to 7 F (for one day or so) in the winter. You can definitely dress for and ride in those temperatures, but the problem with it is if you have a mechanical. You could get into some problems very quickly standing there in the cold. I rode in those temps because I had no other option, but if I just needed to train, I definitely would have been on the turbo.

Rode with a group yesterday with the temp at 26 degrees. You just need to dress right. If you dress right it really is not that bad.