Originally Posted by
Stratocaster
Yes, the difference is always there...as are the psychological variables. You are proving my point.
In a math problem, the lighter bike is always faster. You said it doesn't matter that variables happen in real life. Sure it does. That's the difference between a math problem and real life.
In selecting a particular bike with a particular weight, you're selecting a constant rather than a variable. And this whole discussion is a simple math problem.
rpenmanparker is correct, except that he forgot that the heavier bike is faster when going downhill.