My company enters a Dragon Boat race every year, in September (I think), and this year, I thought I'd travel there by bike. It's around 130 miles from my house, so I thought I'd get sponsored for charity, take the Friday off, cycle up there, spend the Saturday at the racing (I'm in the crew, but it's not really hard work), and the cycle back on the Sunday. Then, having stared my new cycle business, working with Downtube, I thought it would be great publicity to do it on my Downtube 9 speed full suspension folder.
Now, I've read all about nutrition and hydration on the ride, and will have a Bento bag full of food, plenty of fluids, and will stick to the guidelines as a minimum. The IXFS is fairly low geared, so I think I'll be fine on the hills even when tired. My question is, how will I know I'm ready? I've only done commuting mileages over the winter, and really don't have time for training rides of over 40 miles. My plans so far include putting a Brooks on the Downtube, and doing all my training rides on that, for familiarity. If I'm lucky, I'll get to do 2 20-40 mile rides a week. What should I aim for, in order to be sure I'll make it?