Originally Posted by oboeguy
Colder weather ==> having the backpack keeps us warmer than our rack / messenger bag friends. That is all.

You're not already warm enough while cycling? (I'm the guy you see with steam pouring off his head at the stopsign.)
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-=- '05 Jamis Nova -=- '04 Fuji Absolute -=- '94 Trek 820 -=- '77 Schwinn Scrambler 36/36 -=-
Friends don't let friends use brifters.