Quote Originally Posted by sundial View Post
As I was noodling around on my freight train bike, I was pondering the benefits of riding a heavier bike + less saddle time vs. a lighter bike + longer saddle time.

If my heavier bike is twice the weight of my lighter bike and I go half the distance of my lighter bike ride, am I still getting the same cardio benefit?
I think not. If you are only going five miles, and riding slower because the the bike is heavier, it's not nearly the benefit of riding ten miles at higher pace on a lighter bike. I seriously doubt that anyone rides twice as fast/hard on a heavy bike, the tendency is to slow down because the bike is a pig.