Originally Posted by
Roody
There's an interesting
article on icebike.org about why winter speeds are slower. They conclude that greater air density is a major factor.
I looked at this again and don't think their reasoning is correct. By their reasoning, it looks like they are saying that if the air density doubles- 100% increase - your speed would drop to zero. Even if you can approximate speed changes due to small changes in density by a linear relationship, the proportionality factor is probably not 1.0.