Done it but don't recommend it!
I have ridden races and centuries with a cold when I was younger, but it was always a mistake! It always took forever to get over the cold afterwards, really felt bad afterwards, etc., etc.
When you get a cold you should rest so your body can work on kicking hte bug! Other people I know who have tried this have then gotten sinus infections, and really yucky things!
Why would you want to be that miserable?
I wouldn't do it. Your health is more important than racking up another century. And feeling crummy for hours on end....well, it's your call, but all I want to do on the first real day of a cold is take it easy and pamper myself with naps and chicken soup.
Feel better soon!
Emily
I wouldn't recommend it either...
I tried to do a longer ride in Sept with a cold and I couldn't even breathe. I had to stop because I was nearly going to faint, and my throat was constricting so much, so I turned back. After that debacle it probably set me back another several days in terms og getting healthy again. I would let it run its course and not worry about it. I will NOT ride again being as sick as I was that day.