Originally Posted by
Jurgen
I wouldn't cycle in shorts anything below 50 degrees, and even that is probably on the low end of reasonableness.
Why take the risk with your knees?
If you're feeling kinda Homer Simpson though ("Don't you hate pants??"), invest in some leg warmers for those ~50 degree days and quality tights for when its colder.
I'll go a little cooler than that- high 40s maybe. One of the honchos in my bike club is always on me about protecting my knees, but I don't think he bares is legs at anything less than 65. Wimp.