I had heard about the hairshirt in past years, and a friend asked if I wanted to do it this year.. after psyching myself up into training, I realized that it was this week! My longest rides so far have only been 80-90km with a group, averaging about 30 kph.. any thoughts on what kind of training would be required for such a ride?

I think I need to get at least a full (imperial) century under my belt before I consider a double.