Being a good bike trainee, I consistently weigh myself before and after each ride to see how the hydration thing is going. I think I stared it because in the summer a lot of my rides are in the evening with temps above 90, and high humidity. Today's ride started with the temp at 57, and ended at 77. Not exactly hot. I rode 60.79 miles and averaged 17.3, and when I got home, I found I'd lost 4 pounds - that's 2 quarts. During the ride I drank 40 ounces of Gatorade, and 20 ounces of water. Not enough. I mowed the lawn after the ride (push mower), and decided to weigh myself after that, and discovered I was down another 2 pounds.
That 60 mile ride was the longest I've been on since the beginning of September, 2006. Since I'm hoping to do the 75 mile ride on May 19, I need to get the miles up. I am not sure I could have done another 15 today. I've still got some time to get better, though. Tomorrow, though will just be an easy 30 or 40 miles.
The jury is no longer out on the seat that came on the new bike. It's not great, but its light years better than the one I was using on the other bike.