Tuesday was a 31 mile day for me. This week was 101 miles. Both personal bests for a 2.5 month newbie I tell ya, at around 20 - 23 miles, I'm pretty pooped. That doesn't seem to be improving too quickly, but typically I only ride that far once or maybe twice in a week. Most of my rides are 12 - 15 miles. Doesn't bother me though. I'm in it for the fitness and that's way better than it was when I started.