I will be riding STP this year and had planned that it would be my first double century in a day. But I was recently invited to join a group in a slightly hilly double here in Idaho's mountains that I don't want to pass up. The problem is that there is only three weeks between events and I don't want to be weak for STP.

I am pretty fit right now and completed a sub-five hour (ride time) century a few weeks ago on my converted fixed gear. Centuries are fun and not that taxing if I am not going for broke. I just don't know how the double game is different (although I always feel like I could do much more after a century). How long will I need to recover from the first double?