My indoor bike, a Schwinn Airdyne, is my only fixed gear bike.
When I do 40 miles on "The Beast," I am totally wasted for about 1/2 hour. It takes me roughly 3 hours.
When riding outside, on a real bike (Specialized Crosstrail - Hybrid 9 spd triple,) the same 40 miles take about the same time, and I'm much more relaxed while riding, and not nearly as worn out.
You people are either, nuts, gluttons for punishment, or, in extremely good shape.
My current goals are 30 - 40 miles per day (average over 7 days), and 1,000 miles per month. I seldom take a day off.
I am so happy to be off "The Beast" and back outside on a real bike.
40 miles outside, is so much more fun....... especially if I can shift and coast.....